Article
Environmental Sciences
Hongmei Hu, Jianli Qu, Meirong Zhao, Pengfei Wu, Wenbin Zhu, Yongdong Zhou, Hangbiao Jin
Summary: The study found that in the East China Sea, the concentrations of short chain chlorinated paraffins (SCCPs) in both seawater and marine organisms varied within a certain range, indicating potential trophic magnification of SCCPs in the marine food web. It was suggested that hydrophobicity is the major factor influencing the bioaccumulation of SCCPs.
MARINE POLLUTION BULLETIN
(2021)
Review
Environmental Sciences
Weifang Chen, Jiyan Liu, Xingwang Hou, Guibin Jiang
Summary: Chlorinated paraffins (CPs) are widely used persistent organic pollutants (POPs). Recent studies have focused on the biological occurrence, bioaccumulation, transmission, and transformation of CPs, particularly medium-chain (C14-17) CPs (MCCPs) and long-chain (C≥18) CPs (LCCPs). CPs are pervasively distributed across biotas and exhibit diverse accumulation properties in different tissues.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Steven Goodbred, Michael R. Rosen, Reynaldo Patino, David Alvarez, Kathy Echols, Kerensa King, John Umek
Summary: The study assessed the distribution of SOCs in the food web of Lake Mead, Nevada/Arizona, USA and found that the introduction of invasive quagga mussels influenced this distribution. It was observed that quagga mussel growth has shifted a considerable portion of the SOC mass from the pelagic to the benthic environments, resulting in increased risk of SOC exposure for benthic species.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Bo Yuan, Heinz Rudel, Cynthia A. de Wit, Jan Koschorreck
Summary: The study revealed the presence of various types of chlorinated paraffins in different ecosystems across Germany, with long-chain products showing higher concentrations. Data from bream samples collected downstream of a CP-manufacturing factory indicated a significant increase in concentrations of LCCPs over time, reflecting the impact of chemical regulation policies on CP production. The findings serve as an early warning of environmental concerns related to the increasing global production and use of LCCPs.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Bo Yuan, Cynthia A. de Wit
Summary: A study found relatively high concentrations of chlorinated paraffins (CPs) in moose from Grimso'', Sweden compared to other wildlife in Scandinavia. The study examined the temporal trends of CP concentrations in moose calves over the past 40 years. The results showed increasing CP concentrations from 1982 to the 1990s, high levels in 1993 and 2008, and decreasing concentrations after 2012. Male moose had exponentially increasing CP levels with age, while females had exponentially decreasing CP levels. The accumulation of CPs in moose suggests additional stress on males of this long-lived terrestrial mammal.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Environmental Sciences
Sabina Llamazares Vegh, Fernanda Biole, Marta Bavio, Pamela Tripodi, Adolfo F. Gil, Alejandra V. Volpedo
Summary: This study assessed the concentration, bioconcentration, and bioaccumulation of ten trace elements in juvenile fishes in the Lower Parana River. The results showed that all studied species bioaccumulate certain elements and that feeding habits determine trace element concentrations, with significant differences observed between trophic guilds. Further studies are necessary to understand differential behavior between different species within the aquatic web, particularly in the crucial nursery area of the Parana floodplain.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Chang-Gui Pan, Shao-Ke Xiao, Ke-Fu Yu, Qi Wu, Ying-Hui Wang
Summary: The study investigated the occurrence, bioaccumulation, and trophic magnification of legacy and alternative PFAS in subtropical marine food webs in the Beibu Gulf, South China. The results showed that most PFAS exhibited low bioaccumulation levels, with only a few substances showing trophic magnification. Overall, the risk of PFAS exposure through consumption of marine organisms was found to be relatively low.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Jieyi Diao, Zhenwei Chen, Tieyu Wang, Chuanghong Su, Qiongping Sun, Yanjun Guo, Zhao Zheng, Lin Wang, Ping Li, Wenhua Liu, Seongjin Hong, Jong Seong Khim
Summary: The study investigates PFASs in the South China Sea, and suggests that short-chain PFASs have been used as substitutes for long-chain PFASs in recent years. PFOS has biomagnification potential in the marine food web. PFASs consumed through seafood consumption do not pose significant health risks to local residents.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Lauren Negrazis, Karen A. Kidd, Maitane Erdozain, Erik J. S. Emilson, Carl P. J. Mitchell, Michelle A. Gray
Summary: Forest management affects the transport of mercury and its conversion to methylmercury in water systems, which in turn affects the bioaccumulation and trophic transfer of methylmercury in aquatic organisms. The type of disturbance from forestry has an impact on the accumulation of methylmercury and the trophic transfer along the river continuum.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Jakub Tomasko, Ondrej Parizek, Jana Pulkrabova
Summary: This study selected clothing as the research object because it is produced in large quantities worldwide and is worn for long periods in direct contact with human skin. Short- and medium-chain chlorinated paraffins (SCCPs and MCCPs) were found in all samples, with higher concentrations in garments with a substantial proportion of synthetic fibers. The effect of washing in the washing machine varied among individual samples.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Hui Chen, Lijia Xu, Wei Zhou, Xu Han, Lixi Zeng
Summary: This study examined the levels of SCCPs and MCCPs in coral species from the coastal regions of Hainan Island in the South China Sea, finding that both types of chlorinated paraffins were present in all corals and influenced by Symbiodinium densities and coral species. The research highlights the importance of CP toxicity data in evaluating the health of coral reef ecosystems.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Environmental Sciences
Leonomir Cordoba-Tovar, Jose Marrugo-Negrete, Pablo Ramos Baron, Sergi Diez
Summary: Biomagnification of trace elements is increasingly evident in aquatic ecosystems, with mercury, arsenic, and selenium exhibiting different potential for biomagnification. The process is influenced by environmental and ecological factors, and involves key organisms.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Chang Li, Lufeng Chen, Yujian He, Yong Liang, Yingjun Wang, Feifei Li, Wei Gao, Yawei Wang, Guibin Jiang
Summary: The concentration of CPs in sediments varied significantly with the water flow direction, with the highest concentrations found in the oxidation pond closest to a sewage outlet. On the other hand, the oxidation pond farthest from the sewage outlet showed significantly reduced CP concentrations. MCCP levels in the water were below the detection limit, while SCCP concentrations ranged between 41.0 to 1.53 x 10(3) ng/L.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
F. Thibon, L. Weppe, N. Vigier, C. Churlaud, T. Lacoue-Labarthe, M. Metian, Y. Cherel, P. Bustamante
Summary: This study investigated the Li concentrations in marine organisms across different biogeographic areas and found significant variations among tissues, as well as a temperature dependency in the bioaccumulation process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Haotian Wang, Xinghui Xia, Zixuan Wang, Ran Liu, Derek C. G. Muir, Wen-Xiong Wang
Summary: Dietary uptake plays a crucial role in the bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) in freshwater pelagic ecosystems. This study found that the rate and interval of dietary uptake significantly influenced the relative contribution of PAH bioaccumulation, with higher trophic-level organisms showing a greater dependence on dietary uptake for PAH bioaccumulation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Environmental Sciences
Derek C. G. Muir, Elisabeth Galarneau
Summary: This review explores the sources and sinks of polycyclic aromatic compounds (PACs) in Canada, with wildfires being the dominant source, while the sinks are less well-understood. The impacts of changing emissions and environmental conditions on PACs in Canada remain uncertain, and further research is needed to assess future trends and implications.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Derek Muir, Luc T. Miaz
Summary: PFAS, specifically PFCAs and PFSAs, have been widely detected in global surface waters since the early 2000s. The majority of measurements come from coastal seas in Western Europe, China, Korea, and Japan, with highest median concentrations reported in China's Bohai and Yellow Seas region as well as Europe's North and Baltic seas. Significant declines in median PFSAs and C7-C12 PFCAs were observed in the period 2012-2018 in these regions, and for 2004-2017 in the Great Lakes. Mass discharge estimates indicate continued substantial riverine emissions of long chain PFCAs in the coastal seas of China and reductions in emissions for Western European rivers compared to earlier time periods.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Yuxin Ma, Simon Vojta, Jitka Becanova, Asta Zerue Habtemichael, Dave A. Adelman, Derek Muir, Rainer Lohmann
Summary: Organophosphate esters (OPEs) were detected at elevated concentrations in the Great Lakes region, particularly chlorinated compounds, with some dependence on temperature. The main sources were likely anthropogenic influence from surrounding rural and urban areas. Nearly all OPEs underwent net gas-phase deposition to the lakes, dominated by TCEP and TCPPs.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Xiaolei Li, Tannia Chevez, Amila O. De Silva, Derek C. G. Muir, Sonya Kleywegt, Andre Simpson, Myrna J. Simpson, Karl J. Jobst
Summary: This study prioritizes short-chain polychlorinated n-alkanes based on their potential persistence, bioaccumulation, and long-range transport. Results suggest an urgent need to identify and monitor these suspected pollutants, with mass spectrometry being the most appropriate method for accurate identification.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Sarah L. Roberts, Jane L. Kirk, Derek C. G. Muir, Johan A. Wiklund, Marlene S. Evans, Amber Gleason, Allison Tam, Paul E. Drevnick, Ashu Dastoor, Andrei Ryjkov, Fan Yang, Xiaowa Wang, Greg Lawson, Martin Pilote, Jonathan Keating, Benjamin D. Barst, Jason M. E. Ahad, Colin A. Cooke
Summary: The study found that anthropogenic atmospheric Hg deposition in western Canada is showing a synchronous decreasing trend, while increasing in the east, with spatial patterns mainly driven by longitude and proximity to point sources. Recent sediment-derived Hg fluxes were consistent with wet deposition monitoring results, validating the reliability of the research method.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Letter
Engineering, Environmental
Xianming Zhang, Xiangfei Sun, Ruifen Jiang, Eddy Y. Zeng, Elsie M. Sunderland, Derek C. G. Muir
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Analytical
John MacInnis, Amila O. De Silva, Igor Lehnherr, Derek C. G. Muir, Kyra A. St Pierre, Vincent L. St Louis, Christine Spencer
Summary: The study found that melting snow and ice increased PFAS concentrations in Lake Hazen, while river water from non-glacial freshwater continuum was identified as a major source of contamination. Additionally, the distribution of PFAS in vegetation and soil changed as water flowed downstream.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Review
Chemistry, Analytical
Cynthia A. de Wit, Katrin Vorkamp, Derek Muir
Summary: Persistent organic pollutants (POPs) have accumulated in polar environments due to long-range transport. Climate change has been identified as a factor influencing POP levels and trends, and recent studies have found correlations between climate indices and POP temporal trends. Temperature, precipitation, and sea-ice have also been recognized as important climate parameters affecting POP levels. However, the complexity of physical, chemical, and biological processes requires greater interdisciplinary scientific exchange and collaboration.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Article
Food Science & Technology
Iris Koch, Pranab Das, Bronte E. McPhedran, John M. Casselman, Kristy L. Moniz, Peter van Coeverden de Groot, James Qitsualik, Derek Muir, Stephan Schott, Virginia K. Walker
Summary: This study analyzed mercury levels in fish species from the Arctic waters, finding that most species had mercury levels below the guidelines for subsistence fisheries, but 70% of lake trout samples exceeded the safe threshold and 19% exceeded commercial sale levels. Therefore, it is recommended to establish consumption advisories for lake trout to protect human health.
Article
Environmental Sciences
Nadia Facciola, Magali Houde, Derek C. G. Muir, Steven H. Ferguson, Melissa A. McKinney
Summary: This study compares the feeding ecology and contaminant concentrations in ringed seals from two Canadian sub-Arctic and two Arctic sites, providing insight into how climate-driven diet shifts may affect contaminant exposures in Arctic species. The results suggest that the changing prey fish communities in the sub-Arctic may serve as a harbinger of future conditions in the Arctic. Differences in diet and contaminant concentrations between sub-Arctic and Arctic seals were observed, with seals in Sachs Harbour potentially consuming both southern and Arctic species.
ENVIRONMENTAL POLLUTION
(2022)
Review
Engineering, Environmental
Derek C. G. Muir, Gordon J. Getzinger, Matt McBride, P. Lee Ferguson
Summary: In the past 50 years, the measurement of chemical contaminants in the environment has greatly expanded. However, only a fraction of substances in commerce or of concern have been determined. A bibliometric survey was conducted, which found that pharmaceuticals and current use pesticides accounted for a significant proportion of measured substances.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Leah Chibwe, Amila O. De Silva, Christine Spencer, Camilla F. Teixera, Mary Williamson, Xiaowa Wang, Derek C. G. Muir
Summary: Increased demand for recycling plastic has raised concerns about the potential introduction of hazardous chemicals. A comprehensive screening of 21 plastic flake and pellet samples from Canadian recycling companies revealed the high detection frequencies and concentrations of organophosphorus ester flame retardants and plasticizers, suggesting their incorporation into recycled goods. Although individual concentrations met European Union threshold limits for recycled granules and waste plastic flakes, further research is needed to determine their toxicological thresholds. Our study emphasizes the importance of additional screening to fully understand the presence of potentially hazardous chemicals in goods made from recycled plastics.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Amila O. De Silva, Cora J. Young, Christine Spencer, Derek C. G. Muir, Martin Sharp, Igor Lehnherr, Alison Criscitiello
Summary: This study reports the detection of organophosphate esters (OPEs) in ice cores from the Canadian high Arctic, indicating that the cryosphere can serve as a reservoir for these substances and support their potential long-range transport.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Review
Chemistry, Analytical
Hayley Hung, Crispin Halsall, Hollie Ball, Terry Bidleman, Jordi Dachs, Amila De Silva, Mark Hermanson, Roland Kallenborn, Derek Muir, Roxana Suhring, Xiaoping Wang, Simon Wilson
Summary: Climate change has significant effects on the physical environment in the Arctic, which in turn affects the distribution of contaminants and impacts the Arctic ecosystems. However, there are still gaps in our knowledge about the indirect effects of climate change on contaminants, and more research is needed.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)