Article
Environmental Sciences
Darren J. Koppel, Gwilym A. Price, Kathryn E. Brown, Merrin S. Adams, Catherine K. King, Damian B. Gore, Dianne F. Jolley
Summary: Metal contaminants in Antarctic soils show varied concentrations and activities in different extraction agents, while the DGT method can provide environmentally relevant measurements of metal contaminant lability.
Article
Chemistry, Analytical
Stefan Wagner, Jakob Santner, Johanna Irrgeher, Markus Puschenreiter, Steffen Happel, Thomas Prohaska
Summary: A method using DGT was developed for accurate quantification of trace-level Sr and Pb concentrations and isotope ratios in soils. The method utilizes a novel PTFE membrane binding layer with high selectivity for Sr and Pb. The study showed that the method performed well under various conditions and selective elution process allowed for purification of Sr and Pb fractions.
ANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Siday Marrugo-Madrid, Marta Turull, Hao Zhang, Sergi Diez
Summary: Determining the concentration of an environmental pollutant may not accurately assess health risks if the pollutant is not bioavailable. Therefore, methods to determine pollutant bioavailability are more relevant for assessing toxicity. The diffusive gradient in thin films (DGT) technique has been used to measure labile compounds in the environment, with advancements in speciation and bioavailability of metals and metalloids.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Environmental Sciences
Hamid Pouran, Mohammed Alkasbi, Elma Lahive, Stephen Lofts, Hao Zhang
Summary: The study utilized DGT technique to measure the concentration of ZnO NPs in soils, revealing variations in the dissolution of ZnO NPs and the available concentrations of dissolved and nanoparticulate zinc in different soils.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Marta Turull, Claudia Fontas, Sergi Diez
Summary: In this study, the effects of two different organic amendments on trace metal transfer from soils to crops were investigated. The addition of compost to soil resulted in lower trace metal concentrations in lettuce compared to soils with no amendment. Biochar also showed a reduction in Cr and Pb uptake by lettuce, with higher levels of biochar leading to greater reductions. The DGT method was found to be faster and more cost-effective in predicting metal uptake by plants compared to BCR sequential extraction.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Karelys Umbria-Salinas, Astolfo Valero, Monica Wallner-Kersanach, Carlos Ferreira de Andrade, Maria Josefa Santos Yabe, Julio Cesar Wasserman, Katia Naomi Kuroshima, Hao Zhang
Summary: The study assessed seasonal variations in the concentrations of labile fractions of metals in shipyards located in estuarine areas on the Brazilian subtropical coast, indicating shipyards as hotspots of trace metals where Ecological Risk Assessment should be carried out.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Chemistry, Multidisciplinary
Josep Galceran, Yue Gao, Jaume Puy, Martine Leermakers, Carlos Rey-Castro, Chunyang Zhou, Willy Baeyens
Summary: The paper reviews the use of Diffusive Gradients in Thin-films (DGT) technique for assessing free ions and labile metal complexes in aquatic systems. It discusses the principles and applications of this technique in determining the speciation of different species of elements, including their labile concentrations, mobilities, and labilities. DGT has been successfully applied in determining the organic pool of trace metals in freshwaters and characterizing organic and inorganic complexes in seawaters.
FRONTIERS IN CHEMISTRY
(2021)
Article
Environmental Sciences
Siday Marrugo-Madrid, Manuel Salas-Moreno, Harry Gutierrez-Mosquera, Carlos Salazar-Camacho, Jose Marrugo-Negrete, Sergi Diez
Summary: To fulfill the requirements of the Minamata Convention on Mercury, it is important to monitor mercury contamination in freshwater ecosystems near artisanal and small scale gold mining (ASGM) areas. This study examined the feasibility of using the diffusive gradient in thin-films (DGT) technique to detect and quantify labile mercury and other metals in a hard-to-reach gold mining district in Colombia. The results showed that the labile mercury concentrations were higher in abandoned mining ponds compared to the river water, and the labile concentrations of other metals were related to their proximity to ASGM activities.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Thomas D. W. Corbett, Adam Hartland, William Henderson, Gerald J. Rys, Louis A. Schipper
Summary: A novel Br--DGT technology was developed for accurate measurement of bromide concentrations in water, with high absorption and elution efficiencies, providing comparable results under different conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Rui Chen, Jiaxing Liu, Guoyu Ding, Fumin Ren, Rongguang Shi, Jungang Lv, Jing Cheng
Summary: This study developed new binding gels for the rapid and simultaneous quantification of bioavailability concentrations of various heavy metals in soils. The SA-PGA gel exhibited the best adsorption properties, and the SA-PGA-DGT device proved to be a reliable tool for this analysis.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Engineering, Environmental
Samuel D. Hodges, David G. Wahman, Levi M. Haupert, Huong T. Pham, Margaret K. Bozarth, Michael B. Howland, Julian L. Fairey
Summary: Mass transport in diffusive gradients in thin-film passive samplers is restricted by diffusion through a gel layer. The traditional standard analysis method has a large variation in the diffusion coefficient results, while a finite difference model provides more accurate results.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Tian-Jiao Wei, Dong-Xing Guan, Xi-Yuan Li, Yi-Long Hao, H. Henry Teng, Ji-Feng Yang, Yao-Yang Xu, Gang Li
Summary: This study analyzed the development of DGT technique in the past few decades using bibliometric methods, identified its application hotspots in water, sediment, and soil research, and discussed its potential and practical applications in environmental studies.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Chemistry, Multidisciplinary
Thomas D. W. Corbett, Adam Hartland, William Henderson, Gerald J. Rys, Louis A. Schipper
Summary: Diffusive gradients in thin films (DGTs) have been established as useful tools for the determination of nitrate, phosphate, trace metals, and organic concentrations. To increase the uptake of DGT for routine monitoring, methods for in-field analysis are required. In this study, a chitosan-stabilized silver nanoparticle (AuNP) suspension liquid-binding layer and an Fe(0)-impregnated poly-2-acrylamido-2-methyl-1-propanesulfonic acid/acrylamide copolymer hydrogel [Fe(0)-p(AMPS/AMA)] were developed for the determination of nitrite and nitrate concentrations.
Article
Environmental Sciences
Xuhui Li, Gengjian Meng, Zhuobin Chang, Xinxin Lian, Jianhua Ma, Ruichao Guo, Yulong Wang
Summary: This study utilized DGT technology to detect the FDC of tetracyclines, showing that the FDC of tetracyclines in o-DGT devices can be accurately determined, and suggesting that adsorption kinetics should be corrected when calculating the FDCs of organic pollutants.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
Yang-Guang Gu, Shi-Jun Jiang, Richard W. Jordan, Hong-Hui Huang, Feng-Xia Wu
Summary: The main objective of this research is to assess the combined toxicity of trace metal mixtures in aquatic biota in coastal sediments. Coastal sediments are a major source of trace metals from industrial wastewater discharge. The study site, Daya Bay in southern China, was chosen due to severe man-made impacts. The Diffusive Gradients in Thin Films (DGT) technique was used to measure the bioavailability of trace metals and investigate their distribution and biological risks in surface sediments. Risk assessments showed that Mn, Cu, Zn, and Pb had toxic effects that should not be ignored, and the probabilistic ecological risk assessment revealed a low probability (9.04%) of adverse effects on aquatic biota in Daya Bay surface sediments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Daniel R. McKeating, Vicki L. Clifton, Cameron P. Hurst, Joshua J. Fisher, William W. Bennett, Anthony Perkins
Summary: A study using elemental metabolomics was conducted to predict adverse outcomes in pregnancy, including small for gestational age, low placental weight, and preterm birth. It found that certain elements, such as selenium, zinc, and iodine, were associated with these outcomes. Utilizing random forest algorithms, the study showed high accuracy in predicting these adverse outcomes, indicating the potential for early detection and intervention strategies in at-risk pregnancies.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2021)
Article
Environmental Sciences
Nadeeka Rathnayake Kankanamge, William W. Bennett, Peter R. Teasdale, Jianyin Huang, David T. Welsh
Review
Geosciences, Multidisciplinary
William W. Bennett, Donald E. Canfield
EARTH-SCIENCE REVIEWS
(2020)
Article
Limnology
Jian-Jhih Chen, Dirk V. Erler, Naomi S. Wells, Jianyin Huang, David T. Welsh, Bradley D. Eyre
Summary: Estuaries function as key modulators of nitrogen flow to marine ecosystems, with the dominant pathway for N-2 production being coupled nitrification-denitrification, especially in vegetated habitats. Macroalgae habitats play a significant role in N removal and retention, contributing to a large portion of N-2 production and DNRA despite their smaller surface area compared to other habitats. The presence of seagrass and macroalgae is strongly correlated with N-2 production, indicating a potential decrease in the capacity of estuaries to mitigate reactive N loads with the loss of these vegetated habitats.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Engineering, Environmental
Chantal M. Lanctot, Tom Cresswell, Enzo Lombi, William W. Bennett
Summary: Synchrotron-based XFM and XANES imaging were used to study Se biodistribution and speciation in Limnodynastes peronii tadpoles. Results showed that Se primarily accumulated in the eyes, digestive, and excretory organs, with the majority converted to organo-Se.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Jianyin Huang, Jodie Hills, Peter R. Teasdale, Jared G. Panther, Feiyue Wang, David T. Welsh
Summary: The study validated a DGT technique for determining lanthanide rare earth elements (REEs) in sediment pore waters, showing high sensitivity and reliability for measuring REE concentrations.
Review
Environmental Sciences
Danielle Hill, Tom Cresswell, William Bennett, Chantal Lanctot
Summary: Studies found that premetamorphic amphibians have higher metal concentrations than postmetamorphic ones, indicating that these metals can be largely excreted before or during metamorphosis. The concentrations of metals in the gut decreased from pre to postmetamorphic stages. Laboratory studies did not identify significant effects related to metamorphosis at concentrations below water quality standards, but delays in timing or growth were observed in field studies.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Phuping Sucharitakul, Kylie A. Pitt, David T. Welsh
Summary: The study found that ephyrae ingest more microbeads via trophic transfer than by direct ingestion, and that medusae ingest more microbeads from the light incubation than from the dark incubation or virgin microbeads, indicating that the presence of photosynthetic organisms in biofilms enhanced the palatability of the microbeads.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Orlando Lam-Gordillo, Luke M. Mosley, Stuart L. Simpson, David T. Welsh, Sabine Dittmann
Summary: The study found significant differences in benthic communities and functional traits across different sites, with higher abundance and more traits expressed in the estuarine region. The differences in benthic traits were correlated with sediment biogeochemistry and nutrient concentrations.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Phuping Sucharitakul, Kylie A. Pitt, David T. Welsh
Summary: The study found that treated wastewater had no significant effect on the concentration and composition of microplastics in the receiving water. While tiger sea nettles contained microplastics in their guts, the ingested microplastics did not accurately represent those in their environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
Summary: This study demonstrates the utility of synchrotron-based X-ray spectroscopic techniques in investigating the geochemistry of vanadium in ancient marine sediments. The results show that vanadium is primarily hosted by phyllosilicate-III and is strongly associated with potassium-rich clay minerals. The findings suggest that differentiating authigenic and detrital vanadium in ancient marine sediments may not be possible, which has implications for vanadium isotope system studies.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Correction
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
Summary: This paper presents the use of synchrotron-based X-ray techniques to investigate the vanadium host phases in ancient marine sediments. The results show that vanadium is mainly present as vanadium (III) hosted by phyllosilicate. Strong associations between vanadium and potassium suggest that vanadium is hosted by potassium-rich clay minerals. Differentiating authigenic and detrital vanadium in ancient marine sediments is unlikely due to similar chemical speciation for both fractions.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Geosciences, Multidisciplinary
Nicholas J. C. Doriean, William W. Bennett, John R. Spencer, Alexandra Garzon-Garcia, Joanne M. Burton, Peter R. Teasdale, David T. Welsh, Andrew P. Brooks
Summary: Gully erosion can significantly impact global river sediment budgets, with remediation efforts showing promising results in reducing suspended sediment and nutrient export. In a preliminary evaluation of landscape-scale gully remediation in the Great Barrier Reef catchment, a high level of financial and logistical effort was invested to develop long-lasting erosion mitigation measures. Water quality monitoring techniques, including a novel suspended sediment monitoring network, were used to compare remediated and control gullies, showing lower suspended sediment and nutrient concentrations in the remediated site. Long-term monitoring is necessary to validate the findings and demonstrate the potential of landscape-scale remediation as an effective mitigation action.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2021)