Sarit Kaserzon

Characterisation and comparison of the uptake of ionizable and polar pesticides, pharmaceuticals and personal care products by POCIS and Chemcatchers

Publisher: Royal Society of Chemistry (RSC)

Date: 2014

DOI: 10.1039/C4EM00392F

Abstract: This study presents new data on the s ling of ionizable and polar organic chemicals of environmental relevance with POCIS and Chemcatcher.

Machine learning combined with non-targeted LC-HRMS analysis for a risk warning system of chemical hazards in drinking water: A proof of concept

Publisher: Elsevier BV

Date: 04-2019

DOI: 10.1016/J.TALANTA.2018.11.039

Abstract: Guaranteeing clean drinking water to the global population is becoming more challenging, because of the cases of water scarcity across the globe, growing population, and increased chemical footprint of this population. Existing targeted strategies for hazard monitoring in drinking water are not adequate to handle such erse and multidimensional stressors. In the current study, we have developed, validated, and tested a machine learning algorithm based on the data produced via non-targeted liquid chromatography coupled with high resolution mass spectrometry (LC-HRMS) for the identification of potential chemical hazards in drinking water. The machine learning algorithm consisted of a composite statistical model including an unsupervised component (i.e. principal component analysis PCA) and a supervised one (i.e. partial least square discrimination analysis PLS-DA). This model was trained using a training set of 20 drinking water s les previously tested via conventional suspect screening. The developed model was validated using a validation set of 20 drinking water s les of which 4 were spiked with 15 labeled standards at four different concentration levels. The model successfully detected all of the added analytes in the four spiked s les without producing any cases of false detection. The same validation set was processed via conventional trend analysis in order to cross validate the composite model. The results of cross validation showed that even though the conventional trend analysis approach produced a false positive detection rate of ≤5% the composite model outperformed that approach by producing zero cases of false detection. Additionally, the validated model went through an additional test with 42 extra drinking water s les from the same source for an unbiased examination of the model. Finally, the potentials and limitations of this approach were further discussed.

The first environmental assessment of hexa(methoxymethyl)melamine and co-occurring cyclic amines in Australian waterways

Publisher: Elsevier BV

Date: 11-2020

DOI: 10.1016/J.SCITOTENV.2020.140834

Plastics contamination of store-bought rice

Publisher: Elsevier BV

Date: 08-2021

DOI: 10.1016/J.JHAZMAT.2021.125778

Temporal trends of per- and polyfluoroalkyl substances (PFAS) in the influent of two of the largest wastewater treatment plants in Australia

Publisher: Elsevier BV

Date: 2019

DOI: 10.1016/J.EMCON.2019.05.006

Influence of surface oxidation on the quantification of polypropylene microplastics by pyrolysis gas chromatography mass spectrometry

Publisher: Elsevier BV

Date: 11-2021

DOI: 10.1016/J.SCITOTENV.2021.148835

The legacy and drivers of groundwater nutrients and pesticides in an agriculturally impacted Quaternary aquifer system

Publisher: Elsevier BV

Date: 2021

DOI: 10.1016/J.SCITOTENV.2020.142010

Monthly variation in faeces:blood concentration ratio of persistent organic pollutants over the first year of life: a case study of one infant

Publisher: Elsevier BV

Date: 05-2016

DOI: 10.1016/J.ENVRES.2016.02.017

Abstract: Previous studies have found that the concentrations of a range of persistent organic pollutants (POPs) in faeces is linearly proportional to the POP concentrations in blood of human adults irrespective of age and gender. In order to investigate the correlation between POP concentrations in faeces and blood in infants, the monthly variation of POP concentrations in faeces over the first year of life of one infant was investigated in this study and compared to modelled blood concentrations. Faecal s les were collected from one male infant daily. The s les were pooled by month and analysed for three selected POPs (2,2('),4,4('),5,5(')-Hexachlorobiphenyl (PCB153), p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE) and 2,2('),4,4'-tetrabromodiphenyl ether (BDE47)). The POP concentrations in faecal s les increased for the first four months by a factor of 2.9, 4.9 and 1.4 for PCB153, BDE47, and p,p'-DDE, respectively. The faecal concentrations of all POPs decreased rapidly following the introduction of formula and solid food to the diet and subsequent weaning of the infant. Further, a one-compartment model was developed to estimate the daily POP concentrations in the blood of the infant. The POP concentrations in blood were predicted to vary much less over the first year than those observed in faeces. The faeces:blood concentration ratio of selected POPs (Kfb) differed significantly (P<0.0001) between the period before and after weaning, and observed changes in Kfb are far greater than the uncertainty in the estimated Kfb. A more stable Kfb after weaning indicates the possibility of applying the stable Kfb values for non-invasive assessment of internal exposure in infants after weaning. The intra-in idual variation in Kfb in infants is worthy of further investigation.

Passive sampling of perfluorinated chemicals in water: In-situ calibration

Publisher: Elsevier BV

Date: 03-2014

DOI: 10.1016/J.ENVPOL.2013.11.030

Abstract: Perfluorinated chemicals (PFCs) have been recognised as environmental pollutants that require monitoring. A modified polar organic chemical integrative s ler (POCIS) is able to quantify aqueous PFCs. However, with varying external water velocity, PFC s ling rates (Rs) may change, affecting accuracy of derived water concentrations. To facilitate field deployment of this s ler, two methods of in-situ calibration were investigated: performance reference compounds (PRCs) and passive flow monitors (PFMs). Increased Rs's (by factors of 1.2-1.9) with PFM loss rate (g d(-1)) were observed for some PFCs. Results indicate PFMs can be used to correct PFC specific Rs's for more reliable estimates of environmental concentrations with a precision of about 0.01 L d(-1). Empirical models presented provide an improved means for aquatic monitoring of PFCs. The PRC approach was unsuccessful, confirming concern as to its applicability with such s lers.

A strategic screening approach to identify transformation products of organic micropollutants formed in natural waters

Publisher: Royal Society of Chemistry (RSC)

Date: 2017

DOI: 10.1039/C6EM00635C

Abstract: Many transformation products (TPs) from organic micropollutants are not included in routine environmental monitoring programs due to limited knowledge of their occurrence and fate.

Assessment of drugs and personal care products biomarkers in the influent and effluent of two wastewater treatment plants in Ho Chi Minh City, Vietnam.

Publisher: Elsevier BV

Date: 08-2018

DOI: 10.1016/J.SCITOTENV.2018.02.309

Abstract: Wastewater s les were collected at the influent and effluent of two wastewater treatment plants (WWTPs) in Ho Chi Minh City, Vietnam and then pooled to daily s les over multiple days using 6 hourly grab s les. The aim was to provide a first assessment of the occurrence, consumption, removal and release of a range of organic chemicals including pharmaceuticals and personal care products (PPCPs), illicit drugs, an artificial sweetener, tobacco and its metabolites and alcohol biomarkers (referred to here as DPCPBs). Nineteen DPCPBs were detected via direct measurement of filtered wastewater on LC-MS/MS with a concentration range of 0.05-38μg/L. Caffeine and paracetamol were the most prominent compounds detected in the influent, while acesulfame was found at the highest concentration in the effluent of both WWTPs. Mean concentrations of metabolites of tobacco (nicotine: 7.6μg/L, cotinine: 1.4μg/L and hydroxycotinine: 1.7μg/L) and alcohol (ethyl sulphate: 3.3μg/L) were lower than those of European countries. Consumption rates based on daily mass loads and catchment population data obtained from the WWTPs were 80% apparent removal rate from the wastewater, three chemicals showed apparent removal efficiency of approximately 50% and the removal efficiency could not be assessed for 5 compounds due to their low concentrations in the influent. Based on the fraction of treated and untreated wastewater (10:90) that is released into the receiving environment we estimated a total discharge of approximately 170kg per day of DPCPBs in Ho Chi Minh City.

Development and calibration of a passive sampler for N-nitrosodimethylamine (NDMA) in water

Publisher: Elsevier BV

Date: 07-2011

DOI: 10.1016/J.CHEMOSPHERE.2011.03.018

Abstract: N-Nitrosamines such as N-nitrosodimethylamine (NDMA) are organic compounds of environmental concern in groundwater, wastewater and potable water due to their potent carcinogenicity in laboratory animal studies and probable human carcinogenicity. While passive s ling techniques have become a widely used tool for providing time-averaged estimates of trace pollutant concentration, for chemicals such as NDMA that have relatively high water solubility, the selection of a suitable sorbent is difficult. This work is a proof of principle study that investigated for the first time the use of coconut charcoal as a passive s ler sorbent. Apparent charcoal/water sorption coefficients for NDMA were >551 mL g(-1) at environmentally relevant aqueous concentrations of less than 1 μg L(-1). Under the experimental conditions employed, a s ling rate of 0.45 L d(-1) was determined and for an aqueous concentration of 1000 ng L(-1), it is predicted that the s ler remains in the linear uptake stage for approximately 4d, while equilibrium attainment would require about 26 d. The presence of humic acid, used as a surrogate for DOC, enhanced NDMA sorption on the coconut charcoal.

Dealing with Flow Effects on the Uptake of Polar Compounds by Passive Samplers

Publisher: American Chemical Society (ACS)

Date: 22-02-2017

DOI: 10.1021/ACS.EST.7B00558

Toxicity thresholds of three insecticides and two fungicides to larvae of the coral Acropora tenuis

Publisher: PeerJ

Date: 28-07-2020

DOI: 10.7717/PEERJ.9615

Abstract: Tropical marine ecosystems, such as coral reefs, face several threats to their health and resilience, including poor water quality. Previous studies on the risks posed by pesticides have focused on five priority herbicides however, as the number of pesticides applied in coastal agriculture increases, a suite of ‘alternative’ pesticides is being detected in tropical nearshore waters. To improve our understanding of the risks posed by alternative pesticides to tropical marine organisms, the effects of three insecticides (diazinon, fipronil, imidacloprid) and two fungicides (chlorothalonil, propiconazole) were tested on larval metamorphosis of the coral Acropora tenuis . A. tenuis larvae were affected by all five pesticides and the reference toxicant copper. The no effect concentration (NEC) and the 10% and 50% effect concentrations (EC 10 and EC 50 , respectively) for larval metamorphosis were estimated from concentration-response curves after 48 h exposure. The NEC, EC 10 and EC 50 (in µg L −1 ), respectively, of each pesticide were as follows: chlorothalonil (2.4, 2.8, 6.0) fipronil (12.3, 13.9, 29.1) diazinon (38.0, 40.8, 54.7) imidacloprid (263, 273, 347) and propiconazole (269, 330, 1008). These toxicity thresholds are higher than reported concentrations in monitoring programs however, these data will contribute to improving water quality guideline values, which inform the total risk assessments posed by complex contaminant mixtures to which these pesticides contribute.

Correspondence on “Calibration of Perfluorinated Alkyl Acid Uptake Rates by a Tube Passive Sampler in Water”

Publisher: American Chemical Society (ACS)

Date: 05-06-2023

DOI: 10.1021/ACSESTWATER.3C00085

Out of sight but not out of mind: Size fractionation of plastics bioaccumulated by field deployed oysters

Publisher: Elsevier BV

Date: 11-2021

DOI: 10.1016/J.HAZL.2021.100021

Response to Comment on “Quantitative Analysis of Selected Plastics in High-Commercial-Value Australian Seafood by Pyrolysis Gas Chromatography Mass Spectrometry”

Publisher: American Chemical Society (ACS)

Date: 16-11-2020

DOI: 10.1021/ACS.EST.0C07097

Rapid screening and identification of chemical hazards in surface and drinking water using high resolution mass spectrometry and a case-control filter

Publisher: Elsevier BV

Date: 09-2017

DOI: 10.1016/J.CHEMOSPHERE.2017.05.071

Abstract: Access to clean, safe drinking water poses a serious challenge to regulators, and requires analytical strategies capable of rapid screening and identification of potentially hazardous chemicals, specifically in situations when threats to water quality or security require rapid investigations and potential response. This study describes a fast and efficient chemical hazard screening strategy for characterising trace levels of polar organic contaminants in water matrices, based on liquid chromatography high resolution mass spectrometry with post-acquisition 'case-control' data processing. This method allowed for a rapid response time of less than 24 h for the screening of target, suspect and non-target unknown chemicals via direct injection analysis, and a second, more sensitive analysis option requiring s le pre-concentration. The method was validated by fortifying s les with a range of pesticides, pharmaceuticals and personal care products (n = 46) with >90% of target compounds positively screened in s les at 1 ng mL

Occurrence and distribution of brominated flame retardants and perfluoroalkyl substances in Australian landfill leachate and biosolids

Publisher: Elsevier BV

Date: 07-2016

DOI: 10.1016/J.JHAZMAT.2016.03.031

Abstract: The levels of perfluroalkyl substances (PFASs), polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCDDs) were studied in Australian landfill leachate and biosolids. Leachate was collected from 13 landfill sites and biosolids were collected from 16 wastewater treatment plants (WWTPs), across Australia. Perfluorohexanoate (PFHxA) (12-5700ng/L) was the most abundant investigated persistent, bioaccumulative and toxic (PBT) chemical in leachate. With one exception, mean concentrations of PFASs were higher in leachate of operating landfills compared to closed landfills. Polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane isomers (HBCDDs) were detected typically at operating landfills in comparatively lower concentrations than the PFASs. Decabromodiphenyl ether (BDE-209) (<0.4-2300ng/g) and perfluoroctanesulfonate (PFOS) (<LOD-380ng/g) were the predominant PBTs detected in biosolids. Using data provided by sites, the volume of leachate discharged to WWTPs for treatment was small (<1% total inflow), and masses of PBTs transferred reached a maximum of 16g/yr (PFHxA). A national estimate of masses of PBTs accumulated in Australian biosolids reached 167kg/yr (BDE-209), a per capita contribution of 7.2±7.2mg/yr. Nationally, approximately 59% of biosolids are repurposed and applied to agricultural land. To our knowledge this study presents the first published data of PFASs and HBCDDs in Australian leachate and biosolids.

Short Depuration of Oysters Intended for Human Consumption Is Effective at Reducing Exposure to Nanoplastics.

Publisher: American Chemical Society (ACS)

Date: 16-11-2022

DOI: 10.1021/ACS.EST.2C02269

Abstract: Nanoplastics (NPs <1 μm) have greater availability to marine organisms than microplastics (1-5000 μm). Understanding NP uptake and depuration in marine organisms intended for human consumption is imperative for food safety, but until now it has been limited due to analytical constraints. Oysters (

Aquatic Global Passive Sampling (AQUA-GAPS) Revisited: First Steps toward a Network of Networks for Monitoring Organic Contaminants in the Aquatic Environment

Publisher: American Chemical Society (ACS)

Date: 11-01-2017

DOI: 10.1021/ACS.EST.6B05159

Abstract: Organic contaminants, in particular persistent organic pollutants (POPs), adversely affect water quality and aquatic food webs across the globe. As of now, there is no globally consistent information available on concentrations of dissolved POPs in water bodies. The advance of passive s ling techniques has made it possible to establish a global monitoring program for these compounds in the waters of the world, which we call the Aquatic Global Passive S ling (AQUA-GAPS) network. A recent expert meeting discussed the background, motivations, and strategic approaches of AQUA-GAPS, and its implementation as a network of networks for monitoring organic contaminants (e.g., POPs and others contaminants of concern). Initially, AQUA-GAPS will demonstrate its operating principle via two proof-of-concept studies focused on the detection of legacy and emerging POPs in freshwater and coastal marine sites using both polyethylene and silicone passive s lers. AQUA-GAPS is set up as a decentralized network, which is open to other participants from around the world to participate in deployments and to initiate new studies. In particular, participants are sought to initiate deployments and studies investigating the presence of legacy and emerging POPs in Africa, Central, and South America.

Assessment of Mobilization Potential of Per- and Polyfluoroalkyl Substances for Soil Remediation.

Publisher: American Chemical Society (ACS)

Date: 28-06-2022

DOI: 10.1021/ACS.EST.2C00401

Abstract: This study investigated the mobilization of a wide range of per- and polyfluoroalkyl substances (PFASs) present in aqueous film-forming foams (AFFFs) in water-saturated soils through one-dimensional (1-D) column experiments with a view to assessing the feasibility of their remediation by soil desorption and washing. Results indicated that sorption/desorption of most of the shorter-carbon-chain PFASs (

Development and calibration of a passive sampler for perfluorinated alkyl carboxylates and sulfonates in water

Publisher: American Chemical Society (ACS)

Date: 20-04-2012

DOI: 10.1021/ES300593A

Abstract: Perfluorinated chemicals (PFCs) are emerging environmental contaminants with a global distribution. Due to their moderate water solubility, the majority of the environmental burden is assumed to be in the water phase. This work describes the application of the first passive s ler for the quantitative assessment of concentrations of perfluorinated alkylcarboxylates (PFCAs) and sulfonates (PFSAs) in water. The s ler is based on a modified Polar Organic Chemical Integrative S ler (POCIS) with a weak anion exchange sorbent as a receiving phase. S ling rates were between 0.16 and 0.37 L d(-1), and the duration of the kinetic s ling stage was between 2.2 and 13 d. A field deployment in the most urbanized estuary in Australia (Sydney Harbour) showed trace level concentrations from passive s lers (0.1-12 ng L(-1)), in good agreement with parallel grab s ling (0.2-16 ng L(-1)). A separate field comparison of the modified POCIS with standard POCIS suggests the latter may have application for PFC s ling, but with a more limited range of analytes than the modified POCIS which contains a sorbent with a mixed mode of action.

Calibration and validation of a novel passive sampling device for the time integrative monitoring of per- and polyfluoroalkyl substances (PFASs) and precursors in contaminated groundwater

Publisher: Elsevier BV

Date: 03-2019

DOI: 10.1016/J.JHAZMAT.2018.12.010

Abstract: Per-and polyfluoroalkyl substances (PFASs) as key components in aqueous film forming foams (AFFF) have led to growing incidences of environmental contamination. The aim of this study was to investigate a novel diffusion based passive s ling device comprising of microporous polyethylene (PE) for the long-term time-integrative monitoring of PFASs in groundwater systems. PE passive s lers (PEs) were deployed for 83 d and calibrated at five AFFF impacted groundwater sites representing different PFASs concentration levels (ΣPFAS 0.001 to 0.1 ng mL

Stressor dominance and sensitivity‐dependent antagonism: Disentangling the freshwater effects of an insecticide among co‐occurring agricultural stressors

Publisher: Wiley

Date: 21-06-2019

DOI: 10.1111/1365-2664.13430

Inter-laboratory mass spectrometry dataset based on passive sampling of drinking water for non-target analysis

Publisher: Springer Science and Business Media LLC

Date: 24-08-2021

DOI: 10.1038/S41597-021-01002-W

Abstract: Non-target analysis (NTA) employing high-resolution mass spectrometry is a commonly applied approach for the detection of novel chemicals of emerging concern in complex environmental s les. NTA typically results in large and information-rich datasets that require computer aided (ideally automated) strategies for their processing and interpretation. Such strategies do however raise the challenge of reproducibility between and within different processing workflows. An effective strategy to mitigate such problems is the implementation of inter-laboratory studies (ILS) with the aim to evaluate different workflows and agree on harmonized/standardized quality control procedures. Here we present the data generated during such an ILS. This study was organized through the Norman Network and included 21 participants from 11 countries. A set of s les based on the passive s ling of drinking water pre and post treatment was shipped to all the participating laboratories for analysis, using one pre-defined method and one locally (i.e. in-house) developed method. The data generated represents a valuable resource (i.e. benchmark) for future developments of algorithms and workflows for NTA experiments.

Time-Integrative Passive Sampling of Very Hydrophilic Chemicals in Wastewater Influent

Publisher: American Chemical Society (ACS)

Date: 22-09-2020

DOI: 10.1021/ACS.ESTLETT.0C00685

Glyphosate herbicide: is it as safe as we thought?

Publisher: Wiley

Date: 13-03-2018

DOI: 10.1111/AEC.12603

The strength in numbers: comprehensive characterization of house dust using complementary mass spectrometric techniques

Publisher: Springer Science and Business Media LLC

Date: 04-03-2019

DOI: 10.1007/S00216-019-01615-6

Continuation of opioid replacement program delivery in the aftermath of cyclones in Queensland, Australia: A qualitative exploration of the perspectives of pharmacists and opioid replacement therapy s

Publisher: Elsevier BV

Date: 08-2020

DOI: 10.1016/J.SAPHARM.2019.11.007

Abstract: Cyclones can significantly impact on communities and their healthcare services. Community members with chronic diseases, including opioid dependence, who rely on these healthcare services are placed at an increased risk of treatment disruption during a disaster event. Disruptions to the continuity of the opioid replacement therapy (ORT) service can potentially lead to relapse, withdrawal, and risky behaviours in clients with potential repercussions for the community. To explore the effects of Queensland (QLD) cyclones on opioid treatment programs within Queensland community and hospital pharmacies from three perspectives. Qualitative research methods were used. Participants comprised five community pharmacists, four Queensland opioid treatment program (QOTP) employees, and five public hospital pharmacists. Participants were identified as they had worked in Townsville, Rockh ton, Mackay, or Yeppoon in a community impacted by a cyclone and involved with ORT supply. Interviews were recorded and data were analysed by two methods - manual coding and the text analytics software Leximancer®. The two themes that emerged from the manual coding process were 'disaster preparedness' and 'continuity of service'. The key themes from the Leximancer® analysis aligned with the two manual coding themes with no new themes identified. Primary dosing site closures in disaster-affected areas led to increased pressures on hospitals and other community pharmacy dosing sites to supply ORT doses to clients. However, a lack of dosing information available to pharmacists and strict legislative requirements made continuity of ORT supply during these cyclones difficult. Continuation of ORT services during and in the aftermath of a cyclone event is complex. This research highlighted a need for a coordination of efforts and shared dosing information between QOTP employees, community pharmacists, and hospital pharmacists. To improve continuity of ORT services, it is essential that these stakeholders engage with each other in preparing for and responding to future events.

Glyphosate and AMPA passive sampling in freshwater using a microporous polyethylene diffusion sampler

Publisher: Elsevier BV

Date: 12-2017

DOI: 10.1016/J.CHEMOSPHERE.2017.08.013

Abstract: Glyphosate (PMG) is one of the most widely used herbicides with a reported 8.6 million tons applied globally in 2016. Due to widespread use and limited understanding of long-term environmental impacts, it is expected that future monitoring requirements for PMG and its primary metabolite aminomethyl phosphonic acid (AMPA) in aquatic environments will increase, along with the need for low cost monitoring and risk assessment strategies. The aim of this study was to investigate a microporous polyethylene tube (MPT 2-mm thickness, 17.6 cm

Novel Per- and Polyfluoroalkyl Substances Discovered in Cattle Exposed to AFFF-Impacted Groundwater

Publisher: American Chemical Society (ACS)

Date: 30-08-2023

DOI: 10.1021/ACS.EST.3C03852

Passive sampling of perfluorinated chemicals in water: Flow rate effects on chemical uptake

Publisher: Elsevier BV

Date: 06-2013

DOI: 10.1016/J.ENVPOL.2013.02.002

Abstract: A recently developed modified polar organic chemical integrative s ler (POCIS) provides a means for monitoring perfluorinated chemicals (PFCs) in water. However, changes in external flow rates may alter POCIS s ling behaviour and consequently affect estimated water concentrations of analytes. In this work, uptake kinetics of selected PFCs, over 15 days, were investigated. A flow-through channel system was employed with spiked river water at flow rates between 0.02 and 0.34 m s(-1). PFC s ling rates (Rs) (0.09-0.29 L d(-1) depending on analyte and flow rate) increased from the lowest to highest flow rate employed for some PFCs (MW ≤ 464) but not for others (MW ≥ 500). Rs's for some of these smaller PFCs were increasingly less sensitive to flow rate as this increased within the range investigated. This device shows promise as a s ling tool to support monitoring efforts for PFCs in a range of flow rate conditions.

Removal of 293 organic compounds in 15 WWTPs studied with non-targeted suspect screening

Publisher: Royal Society of Chemistry (RSC)

Date: 2022

DOI: 10.1039/D2EW00088A

Abstract: The influence of WWTP treatment standard on contaminant breakthrough is explored for 293 compounds.

In Situ Calibration of Passive Samplers for Viruses in Wastewater

Publisher: American Chemical Society (ACS)

Date: 08-02-2022

DOI: 10.1021/ACSESTWATER.1C00406

Sensitivity and specificity of macroinvertebrate responses to gradients of multiple agricultural stressors

Publisher: Elsevier BV

Date: 12-2021

DOI: 10.1016/J.ENVPOL.2021.118092

Current-use pesticides in New Zealand streams: Comparing results from grab samples and three types of passive samplers

Publisher: Elsevier BV

Date: 11-2019

DOI: 10.1016/J.ENVPOL.2019.112973

Abstract: New Zealand uses more than a ton of pesticides each year many of these are mobile, relatively persistent, and can make their way into waterways. While considerable effort goes into monitoring nutrients in agricultural streams and programs exist to monitor pesticides in groundwater, very little is known about pesticide detection frequencies, concentrations, or their potential impacts in New Zealand streams. We used the 'Polar Organic Chemical Integrative S ler' (POCIS) approach and grab water s ling to survey pesticide concentrations in 36 agricultural streams in Waikato, Canterbury, Otago and Southland during a period of stable stream flows in Austral summer 2017/18. We employed a new approach for calculating site-specific POCIS s ling rates. We also tested two novel passive s lers designed to reduce the effects of hydrodynamic conditions on s ling rates: the 'Organic-Diffusive Gradients in Thin Films' (o-DGT) aquatic passive s ler and microporous polyethylene tubes (MPTs) filled with Strata-X sorbent. Multiple pesticides were found at most sites two or more were detected at 78% of sites, three or more at 69% of sites, and four or more at 39% of sites. Chlorpyrifos concentrations were the highest, with a maximum concentration of 180 ng/L. Concentrations of the other pesticides were generally below 20 ng/L. Mean concentrations of in idual pesticides were not correlated with in-stream nutrient concentrations. The majority of pesticides were detected most frequently in POCIS, presumably due to its higher s ling rate and the relatively low concentrations of these pesticides. In contrast, chlorpyrifos was most frequently detected in grab s les. Chlorpyrifos concentrations at two sites were above the 21-day chronic 'No Observable Effect Concentration' (NOEC) values for fish and another two sites had concentrations greater than 50% of the NOEC. Otherwise, concentrations were well-below NOEC values, but close to the New Zealand Environmental Exposure Limits in several cases.

Calibration parameters for the passive sampling of organic UV filters by silicone; diffusion coefficients and silicone–water partition coefficients

Publisher: Elsevier BV

Date: 05-2019

DOI: 10.1016/J.CHEMOSPHERE.2019.02.077

Abstract: In recent years, organic ultraviolet filters (UVFs) received considerable attention as a group of emerging contaminants, including in Australia where the use of UVFs is particularly relevant. Passive s ling using polymers has become widely used for routine monitoring of chemicals in the aquatic environment. Application of passive s lers for monitoring chemicals in the water relies on calibration data such as chemical's polymer-water partition coefficient (K

Correction to Quantitative Analysis of Selected Plastics in High-Commercial-Value Australian Seafood by Pyrolysis Gas Chromatography Mass Spectrometry

Publisher: American Chemical Society (ACS)

Date: 05-10-2020

DOI: 10.1021/ACS.EST.0C05885

Occurrence and concentrations of halogenated natural products derived from seven years of passive water sampling (2007–2013) at Normanby Island, Great Barrier Reef, Australia

Publisher: Elsevier BV

Date: 12-2018

DOI: 10.1016/J.MARPOLBUL.2018.09.032

Abstract: Polydimethylsiloxane (PDMS) based passive water s lers deployed at Normanby Island, Great Barrier Reef (Australia) from 2007 to 2013 were analyzed for halogenated natural products (HNPs). Altogether, 38 s les, typically deployed for 30 days, were studied. Five HNPs (Q1, 2'‑MeO-BDE 68, BC-10, 2,4‑dibromoanisole and 2,4,6‑tribromoanisole) were detected in all s les. Most s les (>90%) featured 2,2'‑diMeO-BB 80, 6‑MeO-BDE 47, 2',6‑diMeO-BDE 68 and 2,4‑dibromophenol. In addition, tetrabromo‑N‑methylpyrrole (TBMP) was detected in ~80% and Cl

Multisite calibration of a microporous polyethylene tube passive sampler for quantifying drugs in wastewater

Publisher: American Chemical Society (ACS)

Date: 16-09-2021

DOI: 10.1021/ACS.EST.1C02900

Toxicity of ten herbicides to the tropical marine microalgae Rhodomonas salina

Publisher: Springer Science and Business Media LLC

Date: 06-05-2020

DOI: 10.1038/S41598-020-64116-Y

Abstract: Herbicide contamination of nearshore tropical marine ecosystems is widespread and persistent however, risks posed by most ‘alternative’ herbicides to tropical marine microalgae remain poorly understood. Experimental exposures of the important but understudied microalgae Rhodomonas salina to seven in idual Photosystem II (PSII) inhibitor herbicides (diuron, metribuzin, hexazinone, tebuthiuron, bromacil, simazine, propazine) led to inhibition of effective quantum yield (ΔF/F m ′) and subsequent reductions in specific growth rates (SGR). The concentrations which reduced ΔF/F m ′ by 50% (EC 50 ) ranged from 1.71-59.2 µg L −1 , while the EC 50 s for SGR were 4-times higher, ranging from 6.27-188 µg L −1 . Inhibition of ΔF/F m ′ indicated reduced photosynthetic capacity, and this correlated linearly with reduced SGR (R 2 = 0.89), supporting the application of ∆F/F m ’ inhibition as a robust and sensitive indicator of sub-lethal toxicity of PSII inhibitors for this microalga. The three non-PSII inhibitor herbicides (imazapic, haloxyfop and 2,4-Dichlorophenoxyacetic acid (2,4-D)) caused low or no toxic responses to the function of the PSII or growth at the highest concentrations tested suggesting these herbicides pose little risk to R. salina . This study highlights the suitability of including R. salina in future species sensitivity distributions (SSDs) to support water quality guideline development for the management of herbicide contamination in tropical marine ecosystems.

Wastewater-based epidemiology biomarkers: past, present and future

Publisher: Elsevier BV

Date: 08-2018

DOI: 10.1016/J.TRAC.2018.06.004

Postflood Monitoring in a Subtropical Estuary and Benchmarking with PFASs Allows Measurement of Chemical Persistence on the Scale of Months

Publisher: American Chemical Society (ACS)

Date: 19-10-2021

DOI: 10.1021/ACS.EST.1C02263

Passive-Sampler-Derived PCB and OCP Concentrations in the Waters of the World─First Results from the AQUA-GAPS/MONET Network

Publisher: American Chemical Society (ACS)

Date: 09-06-2023

DOI: 10.1021/ACS.EST.3C01866

Toxicity thresholds of nine herbicides to coral symbionts (Symbiodiniaceae)

Publisher: Springer Science and Business Media LLC

Date: 04-11-2021

DOI: 10.1038/S41598-021-00921-3

Abstract: Over 30 herbicides have been detected in catchments and waters of the Great Barrier Reef (GBR) and their toxicity to key tropical species, including the coral endosymbiotic algae Symbiodiniaceae, is not generally considered in current water quality guideline values (WQGVs). Mutualistic symbionts of the family Symbiodiniaceae are essential for the survival of scleractinian corals. We tested the effects of nine GBR-relevant herbicides on photosynthetic efficiency (ΔF/F m ′) and specific growth rate (SGR) over 14 days of cultured coral endosymbiont Cladocopium goreaui (formerly Symbiodinium clade C1). All seven Photosystem II (PSII) herbicides tested inhibited ΔF/F m ′ and SGR, with toxicity thresholds for SGR ranging between 2.75 and 320 µg L −1 (no effect concentration) and 2.54–257 µg L −1 (EC 10 ). There was a strong correlation between EC 50 s for ΔF/F m ′ and SGR for all PSII herbicides indicating that inhibition of ΔF/F m ′ can be considered a biologically relevant toxicity endpoint for PSII herbicides to this species. The non-PSII herbicides haloxyfop and imazapic did not affect ΔF/F m ′ or SGR at the highest concentrations tested. The inclusion of this toxicity data for Symbiodiniaceae will contribute to improving WQGVs to adequately inform risk assessments and the management of herbicides in tropical marine ecosystems.

Quantitative Analysis of Selected Plastics in High-Commercial-Value Australian Seafood by Pyrolysis Gas Chromatography Mass Spectrometry

Publisher: American Chemical Society (ACS)

Date: 09-07-2020

DOI: 10.1021/ACS.EST.0C02337

Identification and Quantification of Micro-Bioplastics in Environmental Samples by Pyrolysis-Gas Chromatography-Mass Spectrometry.

Publisher: American Chemical Society (ACS)

Date: 21-09-2022

DOI: 10.1021/ACS.EST.2C04091

Abstract: Bioplastics are materials that are biobased and/or biodegradable, but not necessarily both. Concerns about environmental plastic pollution are constantly growing with increasing demand for substituting fossil-based plastics with those made using renewable resource feedstocks. For many conventional bioplastics to completely decompose/degrade, they require specific environmental conditions that are rarely met in natural ecosystems, leading to rapid formation of micro-bioplastics. As global bioplastic production and consumption/use continue to increase, there is growing concern regarding the potential for environmental pollution from micro-bioplastics. However, the actual extent of their environmental occurrence and potential impacts remains unclear, and there is insufficient mass concentration-based quantitative data due to the lack of quantitative analytical methods. This study developed and validated an analytical method coupling pressurized liquid extraction and pyrolysis-gas chromatography-mass spectrometry combined with thermochemolysis to simultaneously identify and quantify five targeted micro-bioplastics (i.e., polylactic acid (PLA), polyhydroxyalkanoate, polybutylene succinate, polycaprolactone, and polybutylene adipate terephthalate (PBAT)) in environmental s les on a polymer-specific mass-based concentration. The recovery of spiked micro-bioplastics in environmental s les (biosolids) ranged from 74 to 116%. The limits of quantification for the target micro-bioplastics were between 0.02 and 0.05 mg/g. PLA and PBAT were commonly detected in wastewater, biosolids, and sediment s les at concentrations between 0.07 and 0.18 mg/g. The presented analytical method enables the accurate identification, quantification, and monitoring of micro-bioplastics in environmental s les. This study quantified five micro-bioplastic types in complex environmental s les for the first time, filling in gaps in our knowledge about bioplastic pollution and providing a useful methodology and important reference data for future research.

Exploring the Potential of a Global Emerging Contaminant Early Warning Network through the Use of Retrospective Suspect Screening with High-Resolution Mass Spectrometry

Publisher: American Chemical Society (ACS)

Date: 04-04-2018

DOI: 10.1021/ACS.EST.8B00365

Abstract: A key challenge in the environmental and exposure sciences is to establish experimental evidence of the role of chemical exposure in human and environmental systems. High resolution and accurate tandem mass spectrometry (HRMS) is increasingly being used for the analysis of environmental s les. One lauded benefit of HRMS is the possibility to retrospectively process data for (previously omitted) compounds that has led to the archiving of HRMS data. Archived HRMS data affords the possibility of exploiting historical data to rapidly and effectively establish the temporal and spatial occurrence of newly identified contaminants through retrospective suspect screening. We propose to establish a global emerging contaminant early warning network to rapidly assess the spatial and temporal distribution of contaminants of emerging concern in environmental s les through performing retrospective analysis on HRMS data. The effectiveness of such a network is demonstrated through a pilot study, where eight reference laboratories with available archived HRMS data retrospectively screened data acquired from aqueous environmental s les collected in 14 countries on 3 different continents. The widespread spatial occurrence of several surfactants (e.g., polyethylene glycols ( PEGs ) and C12AEO-PEGs ), transformation products of selected drugs (e.g., gabapentin-lactam, metoprolol-acid, carbamazepine-10-hydroxy, omeprazole-4-hydroxy-sulfide, and 2-benzothiazole-sulfonic-acid), and industrial chemicals (3-nitrobenzenesulfonate and bisphenol-S) was revealed. Obtaining identifications of increased reliability through retrospective suspect screening is challenging, and recommendations for dealing with issues such as broad chromatographic peaks, data acquisition, and sensitivity are provided.

Perceived discrimination, language proficiencies, and adaptation: Comparisons between refugee and non-refugee immigrant youth in Australia

Publisher: Elsevier BV

Date: 03-2018

DOI: 10.1016/J.IJINTREL.2017.10.006

Influence of Sample Stability on Non-target Analysis during Long Batch Acquisitions

Publisher: American Chemical Society (ACS)

Date: 11-08-2023

DOI: 10.1021/ACSESTWATER.3C00063

An assessment of quality assurance/quality control efforts in high resolution mass spectrometry non-target workflows for analysis of environmental samples

Publisher: Elsevier BV

Date: 12-2020

DOI: 10.1016/J.TRAC.2020.116063

Combined effects of climate change and the herbicide diuron on the coral Acropora millepora

Publisher: Elsevier BV

Date: 08-2021

DOI: 10.1016/J.MARPOLBUL.2021.112582

An interlaboratory study on passive sampling of emerging water pollutants

Publisher: Elsevier BV

Date: 02-2016

DOI: 10.1016/J.TRAC.2015.10.013

NORMAN guidance on suspect and non-target screening in environmental monitoring

Publisher: Springer Science and Business Media LLC

Date: 04-09-2023

DOI: 10.1186/S12302-023-00779-4

Communicating Confidence of Per- and Polyfluoroalkyl Substance Identification via High-Resolution Mass Spectrometry

Publisher: American Chemical Society (ACS)

Date: 26-05-2022

DOI: 10.1021/ACS.ESTLETT.2C00206

Monitoring Herbicide Concentrations and Loads during a Flood Event: A Comparison of Grab Sampling with Passive Sampling

Publisher: American Chemical Society (ACS)

Date: 10-03-2017

DOI: 10.1021/ACS.EST.6B02858

Abstract: The suitability of passive s lers (Chemcatcher) as an alternative to grab s ling in estimating time-weighted average (TWA) concentrations and total loads of herbicides was assessed. Grab s ling complemented deployments of passive s lers in a tropical waterway in Queensland, Australia, before, during and after a flood event. Good agreement was observed between the two s ling modes in estimating TWA concentrations that was independent of herbicide concentrations ranging over 2 orders of magnitude. In a flood-specific deployment, passive s ler TWA concentrations underestimated mean grab s ler (n = 258) derived concentrations of atrazine, diuron, ametryn, and metolachlor by an average factor of 1.29. No clear trends were evident in the ratios of load estimates from passive s lers relative to grab s les that ranged between 0.3 and 1.8 for these analytes because of the limitations of using TWA concentrations to derive flow-weighted loads. Stratification of deployments by flow however generally resulted in noticeable improvements in passive s ler load estimates. By considering the magnitude of the uncertainty (interquartile range and the root-mean-squared error) of load estimates a modeling exercise showed that passive s lers were a viable alternative to grab s ling since between 3 and 17 grab s les were needed before grab s ling results had less uncertainty.

Calibration and validation of a microporous polyethylene passive sampler for quantitative estimation of illicit drug and pharmaceutical and personal care product (PPCP) concentrations in wastewater influent

Publisher: Elsevier BV

Date: 02-2020

DOI: 10.1016/J.SCITOTENV.2019.135891

Abstract: Wastewater-based epidemiology (WBE), the per capita normalised measurement of drugs, chemicals or metabolites in wastewater influent, relies on s ling and quantitative analysis to evaluate temporal and spatial trends of chemical consumption. Continuous, high-resolution, flow proportional composite s ling is optimal for accurate representations of chemical mass loads, but is rarely implemented, with conventional autos lers providing relatively low frequency time or volume proportional s les. However, due to equipment or resource constraints at many wastewater treatment plants (WWTPs), even this may not be feasible. Passive s ling may provide an alternative s ling strategy. To investigate this, s lers comprising hollow, cylindrical Microporous Polyethylene Tubes (MPTs) containing polymeric sorbent phases of Strata-X and Strata-X in agarose were simultaneously deployed in a municipal WWTP influent stream. S lers were extracted, analysed and evaluated for a range of illicit drugs and pharmaceuticals and personal care products (PPCPs) after 4, 7, 15, 21, and 29 day deployments. The MPT s lers were calibrated against 24-hour time proportional composite grab s les that were collected in parallel. Diffusion through the MPT governed uptake, reducing or eliminating the influence of external flow rates that may fluctuate unpredictably in a WWTP environment. Calibration data for six illicit drugs and fourteen PPCPs, including meth hetamine, benzoylecgonine, MDMA, codeine and carbamazepine, demonstrated linear accumulation in the s lers (R

Sub-organism (acetylcholinesterase activity), population (survival) and chemical concentration responses reinforce mechanisms of antagonism associated with malathion toxicity

Publisher: Elsevier BV

Date: 07-2021

DOI: 10.1016/J.SCITOTENV.2021.146087

A National Wastewater Monitoring Program for a better understanding of public health: A case study using the Australian Census

Publisher: Elsevier BV

Date: 2019

DOI: 10.1016/J.ENVINT.2018.12.003

Abstract: Wastewater contains a large range of biological and chemical markers of human activity and exposures. Through systematic collection and analysis of these markers within wastewater s les it is possible to measure the public health of whole populations. The analysis of effluent and biosolids can also be used to understand the release of chemicals from wastewater treatment plants into the environment. Wastewater analysis and comparison with catchment specific data (e.g. demographics) however remains largely unexplored. This manuscript describes a national wastewater monitoring study that combines influent, effluent and biosolids s ling with the Australian Census. An archiving program allows estimation of per capita exposure to and consumption of chemicals, public health information, as well as per capita release of chemicals into the environment. The paper discusses the study concept, critical steps in setting up a coordinated national approach and key logistical and other considerations with a focus on lessons learnt and future applications. The unique combination of archived s les, analytical data and associated census-derived population data will provide a baseline dataset that has wide and potentially increasing applications across many disciplines that include public health, epidemiology, criminology, toxicology and sociology.

In-situ calibration of a microporous polyethylene passive sampling device with polar organic micropollutants in the Chillan River, central Chile

Publisher: Elsevier BV

Date: 09-2020

DOI: 10.1016/J.ENVRES.2020.109738

University Of Queensland

Location: Australia

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RMIT University

Location: Australia

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Discovery Projects - Grant ID: DP200101144

Start Date: 02-2020

End Date: 12-2023

Amount: $330,000.00

Funder: Australian Research Council

Discovery Projects - Grant ID: DP190102476

Start Date: 04-2019

End Date: 04-2023

Amount: $515,000.00

Funder: Australian Research Council

Linkage Projects - Grant ID: LP180101128

Start Date: 02-2020

End Date: 12-2023

Amount: $362,324.00

Funder: Australian Research Council

Linkage Projects - Grant ID: LP160100093

Start Date: 02-2017

End Date: 06-2021

Amount: $340,000.00

Funder: Australian Research Council

Linkage Projects - Grant ID: LP210100059

Start Date: 02-2023

End Date: 02-2026

Amount: $202,000.00

Funder: Australian Research Council

Linkage Projects - Grant ID: LP220100200

Start Date: 2023

End Date: 12-2025

Amount: $159,179.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE210100137

Start Date: 12-2021

End Date: 03-2023

Amount: $881,758.00

Funder: Australian Research Council

Linkage Projects - Grant ID: LP190101124

Start Date: 06-2021

End Date: 06-2025

Amount: $563,412.00

Funder: Australian Research Council