ORCID Profile
0000-0003-4870-5213
Current Organisations
Chalmers University of Technology
,
University of Newcastle Australia
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Wiley
Date: 23-07-2018
Publisher: Wiley
Date: 22-06-2021
DOI: 10.1002/ETC.5072
Abstract: Recently, soil contamination with microplastics has emerged as a serious global environmental concern that has necessitated more research on their potential impacts on soil biota. We investigated the acute and chronic toxicity of 2 different polystyrene microplastics, pure versus commercial (0–0.5% w/w in soil sized 65–125 µm) on earthworm mortality, reproduction, and genotoxicity. Whereas the microplastics showed no acute toxicity in terms of mortality, reproduction was adversely affected in both parents (F0) and first filial generation (F1) of earthworms, with % reduction in juvenile production at 0.5% microplastics concentration in soil. Also, significant genotoxicity in terms of DNA damage was observed in the F0 and F1 earthworms. Chemical analysis of microplastic‐exposed soils showed the presence of several benzene derivatives that are associated with polystyrene particles. Our study, for the first time to our knowledge, demonstrated the long‐term adverse effects on earthworms of polystyrene microplastics even at environmentally relevant concentrations. The results have significant implications for risk assessment of polystyrene microplastics to soil biota. Environ Toxicol Chem 2021 :2240–2246. © 2021 SETAC
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 10-2007
Publisher: Elsevier BV
Date: 08-2020
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 04-2021
Publisher: Elsevier BV
Date: 03-2000
Publisher: Elsevier BV
Date: 05-2021
Publisher: Elsevier BV
Date: 05-2022
Publisher: Elsevier BV
Date: 02-2022
DOI: 10.1016/J.JHAZMAT.2021.127478
Abstract: The characterisation of microplastics is still a challenge, particularly when the s le is a mixture with a complex background, such as an ink mark on paper. To address this challenge, we developed and compared two approaches, (i) Raman imaging, combined with logic-based and principal component analysis (PCA)-based algorithms, and (ii) matrix-assisted laser desorption/ionisation-mass spectrometry (MALDI-MS). We found that, accordingly, (i) if the Raman signal of plastics is identifiable and not completely shielded by the background, Raman imaging can extract the plastic signals and visualise their distribution directly, with the help of a logic-based or PCA-based algorithm, via the "fingerprint" spectrum (ii) when the Raman signal is shielded and masked by the background, MALDI-MS can effectively capture and identify the plastic polymer, via the "barcode" of the mass spectrum linked with the monomer. Overall, both Raman imaging and MALDI-MS have benefits and limitations for microplastic analysis if accessible, the combined use of these two techniques is generally recommended, especially when assessing s les with strong background interference.
Publisher: Springer Science and Business Media LLC
Date: 23-11-2006
Publisher: Informa UK Limited
Date: 02-12-2021
DOI: 10.1080/03601234.2021.2014255
Abstract: This novel study investigated the behavior and fate of chlorothalonil in terms of kinetics, sorption‒desorption and leaching potential in urban landscape soils using batch experiments. The pseudo-second-order model well described the sorption kinetics of chlorothalonil in urban soils. Consequently, chlorothalonil was partitioned into heterogeneous surfaces of soil following the Freundlich isotherm model. According to PCA, soil organic matter (OM), silt, clay, and oxides of Al and Fe exhibited a significant positive correlation (
Publisher: Frontiers Media SA
Date: 10-2021
DOI: 10.3389/FENVS.2021.739775
Abstract: As an emerging contaminant, microplastic is receiving increasing attention. However, the contamination source is not fully known, and new sources are still being identified. Herewith, we report that microplastics can be found in our gardens, either due to the wrongdoing of leaving plastic bubble wraps to be mixed with mulches or due to the use of plastic landscape fabrics in the mulch bed. In the beginning, they were of large sizes, such as & 5 mm. However, after 7 years in the garden, owing to natural degradation, weathering, or abrasion, microplastics are released. We categorize the plastic fragments into different groups, 5 mm–0.75 mm, 0.75 mm–100 μm, and 100–0.8 μm, using filters such as kitchenware, meaning we can collect microplastics in our gardens by ourselves. We then characterized the plastics using Raman image mapping and a logic-based algorithm to increase the signal-to-noise ratio and the image certainty. This is because the signal-to-noise ratio from a single Raman spectrum, or even from an in idual peak, is significantly less than that from a spectrum matrix of Raman mapping (such as 1 vs. 50 × 50) that contains 2,500 spectra, from the statistical point of view. From the 10 g soil we s led, we could detect the microplastics, including large (5 mm–100 μm) fragments and small (& μm) ones, suggesting the degradation fate of plastics in the gardens. Overall, these results warn us that we must be careful when we do gardening, including selection of plastic items for gardens.
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 10-2021
Publisher: Springer Science and Business Media LLC
Date: 19-03-2020
DOI: 10.1038/S41598-020-61146-4
Abstract: Millions of tonnes of plastics have been released into the environment. Although the risk of plastics to humans is not yet resolved, microplastics, in the range of 1 μm - 5 mm, have entered our bodies, originating either from ingestion via the food chain or from inhalation of air. Generally there are two sources of microplastics, either directly from industry, such as cosmetic exfoliants, or indirectly from physical, chemical and biological fragmentation of large ( mm) plastic residues. We have found that microplastics can be generated by simple tasks in our daily lives such as by scissoring with scissors, tearing with hands, cutting with knives or twisting manually, to open plastics containers/bags/tapes/caps. These processes can generate about 0.46–250 microplastic/cm. This amount is dependent on the conditions such as stiffness, thickness, anisotropy, the density of plastic materials and the size of microplastics.This finding sends an important warning, that we must be careful when opening plastic packaging, if we are concerned about microplastics and care about reducing microplastics contamination.
Publisher: Elsevier BV
Date: 10-2019
DOI: 10.1016/J.ACA.2019.05.021
Abstract: Recently, microplastics (MP) have emerged as global contaminants of serious concern to human and ecological health. However, identification and visualisation of MP are still a challenge, whether from wastewater, oceans, sediment or soil. Particularly when MP are mapped to visualise their distribution, the background signal from sediment and soil might be high and shield the MP signal from the analysis. Raman has recently received increasing attention, as the complementary spectrum of infrared (IR), because it can overcome the drawbacks of IR analysis including water interference, low lateral resolution and a complex spectrum. Here we show that Raman can identify and visualise MP from a soil/sand background, with almost no s le preparation, no dye, no destruction of the s le and no interference from water/organic matter/fluorescence background signals as well. By mapping image via their characteristic and fingerprint peaks, MP including polystyrene (PS), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl chloride (PVC) and polypropylene (PP) can be in idually identified and visualised. The lateral resolution along the focal plane is 1 μm ixel to catch small MP down to 1 μm.
Publisher: Elsevier BV
Date: 03-2019
DOI: 10.1016/J.CHEMOSPHERE.2018.11.206
Abstract: Whilst advanced electrochemical oxidation can break down per- and polyfluoroalkyl substances (PFAS), the requirement for expensive electrode materials usually prevents its widespread application. Here we use an industrial material of lead peroxide (PbO
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8AY02382D
Abstract: In this study, aggregation-induced emission luminogens (AIEgen) are used for the detection of per- and poly-fluoroalkyl substances (PFAS) including perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS) and 1 H ,1 H ,2 H ,2 H -perfluorooctanesulfonic acid (6:2FTS).
No related grants have been discovered for zahra sobhani.