ORCID Profile
0000-0003-4936-9602
Current Organisation
James Cook University
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Publisher: Elsevier BV
Date: 02-2018
Publisher: MDPI AG
Date: 25-06-2021
DOI: 10.3390/ANTIBIOTICS10070775
Abstract: Dissemination of antibiotic resistance (AR) in marine environments is a global concern with a propensity to affect public health and many ecosystems worldwide. We evaluated the use of sea turtles as sentinel species for monitoring AR in marine environments. In this field, antibiotic-resistant bacteria have been commonly identified by using standard culture and sensitivity tests, leading to an overrepresentation of specific, culturable bacterial classes in the available literature. AR was detected against all major antibiotic classes, but the highest cumulative global frequency of resistance in all represented geographical sites was against the beta-lactam class by a two-fold difference compared to all other antibiotics. Wastewater facilities and turtle rehabilitation centres were associated with higher incidences of multidrug-resistant bacteria (MDRB) accounting for an average of 58% and 49% of resistant isolates, respectively. Furthermore, a relatively similar prevalence of MDRB was seen in all studied locations. These data suggest that anthropogenically driven selection pressures for the development of AR in sea turtles and marine environments are relatively similar worldwide. There is a need, however, to establish direct demonstrable associations between AR in sea turtles in their respective marine environments with wastewater facilities and other anthropogenic activities worldwide.
Publisher: MDPI AG
Date: 16-02-2023
DOI: 10.3390/EN16041964
Abstract: Biosolids have been traditionally used as a beneficial resource in the agricultural industry. However, contaminants of emerging concern (CECs) threaten their reuse due to concerns of toxicity, bioaccumulation, and increased regulations on acceptable CEC concentrations in biosolids. The thermal treatment of biosolids has the potential to destroy/mineralize these contaminants as well as transform the biosolids into valuable biochar. However, the thermal processing of biosolids is highly energy intensive due to the energy costs associated with drying biosolids to the required moisture content for thermal processing. This article performs a brief review of the drying of biosolids from a physical and theoretical viewpoint. It also provides an overview of pyrolysis and gasification. It explains the impact that moisture can have on both the degradation of CECs and the products that can be obtained through the thermal treatment of biosolids. Additionally, model-based, lab-based, and pilot-scale ex les of integrated drying and thermal treatment processes are reviewed. Key challenges, such as the need for co-pyrolysis and co-gasification, as well as the impact of biosolids composition on energetic viability, are identified.
Publisher: Elsevier BV
Date: 07-2006
Publisher: MDPI AG
Date: 22-07-2022
DOI: 10.3390/CLEANTECHNOL4030041
Abstract: Macroalgae have many potential applications and can make important contributions to sustainability and circular economy objectives. Macroalgae are degradable high-moisture biomaterials and drying is a necessary step, but drying is an energy and capital-intensive part of their production process. This study presents convective drying curves for commercially promising fresh and saltwater species (U. ohnoi and O. intermedium), obtained over a range of industry-relevant drying gas velocities (0.3–2 m/s) and material bulk densities (33–100 kg/m3). Pragmatic diffusion-based drying models that account for the influence of drying gas velocity, material bulk density, and material shrinkage are presented. Results provide critical insights into the validity of diffusion model assumptions for compressible biomaterials and new mechanisms describing gas penetration into such materials are proposed. The drying models provided in this work demonstrate a high degree of accuracy for both species.
Publisher: IGI Global
Date: 2015
DOI: 10.4018/978-1-4666-8246-7.CH040
Abstract: Developing an engineering student's awareness of sustainability through the embedding of sustainability curricula is widely considered to be essential to modernising chemical engineering degree programs. In this chapter, the chemical engineering program at James Cook University is used as a case study to illustrate the design and sequencing of embedded curricula associated with developing a students' awareness of sustainability. There are a wide range of ex les of skills, techniques, and characteristics associated with developing this awareness. In this chapter, an approach is described whereby a set of generic and interdisciplinary capabilities are developed to provide a degree of flexibility in how sustainability is interpreted and taught. A cognitive learning matrix is utilised as a design tool that facilitates determination of new subject learning outcomes aligned with the sustainability capabilities. A variety of curriculum ex les are introduced and described.
Publisher: Springer Science and Business Media LLC
Date: 28-12-2015
Publisher: Elsevier BV
Date: 06-2017
DOI: 10.1016/J.BIORTECH.2017.03.063
Abstract: Microalgae crops can generate a biochemical profile of high energy density and may be used for remediation of contaminated waste waters. This manuscript presents a laboratory-scale investigation into the potential for growing endemic microalgae biofilms in phosphorus-enriched nickel refinery tailings water, with an emphasis on product potential and the remediation of heavy metals. The dominant species of the consortia was a Chlorella-like microalga. The growth was monitored over time, with a productivity (0.77±0.07gAFDW.m
Publisher: Elsevier
Date: 2003
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2011
Publisher: AIP
Date: 2013
DOI: 10.1063/1.4825928
Publisher: Elsevier BV
Date: 03-1998
Publisher: IGI Global
Date: 2014
DOI: 10.4018/978-1-4666-5856-1.CH024
Abstract: Developing an engineering student's awareness of sustainability through the embedding of sustainability curricula is widely considered to be essential to modernising chemical engineering degree programs. In this chapter, the chemical engineering program at James Cook University is used as a case study to illustrate the design and sequencing of embedded curricula associated with developing a students' awareness of sustainability. There are a wide range of ex les of skills, techniques, and characteristics associated with developing this awareness. In this chapter, an approach is described whereby a set of generic and interdisciplinary capabilities are developed to provide a degree of flexibility in how sustainability is interpreted and taught. A cognitive learning matrix is utilised as a design tool that facilitates determination of new subject learning outcomes aligned with the sustainability capabilities. A variety of curriculum ex les are introduced and described.
Publisher: Informa UK Limited
Date: 19-05-2018
Publisher: Elsevier BV
Date: 06-2009
Publisher: Elsevier BV
Date: 11-2000
Publisher: Elsevier BV
Date: 04-2007
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1RP90068D
Publisher: Elsevier BV
Date: 08-2005
Publisher: American Chemical Society (ACS)
Date: 30-09-2014
DOI: 10.1021/IE502607M
Publisher: Elsevier BV
Date: 10-2008
Publisher: Elsevier BV
Date: 06-2012
Publisher: Elsevier BV
Date: 11-2006
Publisher: Elsevier BV
Date: 12-2008
Publisher: American Chemical Society (ACS)
Date: 26-08-1999
DOI: 10.1021/OP990050S
Publisher: Elsevier BV
Date: 2016
Publisher: American Chemical Society (ACS)
Date: 04-12-2015
Publisher: Elsevier BV
Date: 05-2012
Publisher: Inderscience Publishers
Date: 2015
Publisher: The Electrochemical Society
Date: 2009
DOI: 10.1149/1.3176879
Publisher: Elsevier BV
Date: 03-2010
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Madoc Sheehan.