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To determine whether the bioavailability of trace elements derived from coal ash leachates varies with the geochemical conditions associated with their formation, we quantified periphyton bioaccumulation and subsequent trophic transfer to the mayfly Neocloeon triangulifer. Oxic ash incubations favored periphyton uptake of arsenic, selenium, strontium, and manganese, whereas anoxic incubations favored periphyton uptake of uranium. Mayfly enrichment was strongest for selenium, whereas biodilution was observed for strontium, uranium, and arsenic. Environ Toxicol Chem 2017;36:2991-2996. © 2017 SETAC.
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http://dx.doi.org/10.1002/etc.3864 | DOI Listing |
Aquat Toxicol
October 2025
Department of Biological Sciences, North Carolina State University, Raleigh, NC 27607, USA. Electronic address:
Per-and polyfluoroalkyl substances (PFAS) are ubiquitous contaminants in freshwater ecosystems. Many PFAS are incorporated into food webs, with potential effects on ecological and human health. However, PFAS incorporation into the base of aquatic food webs remains poorly understood.
View Article and Find Full Text PDFEnviron Toxicol Chem
August 2025
U.S. Geological Survey, Boise, ID, United States.
Copper-based chemical treatments are commonly used to eradicate invasive mussels in small ponds and lakes, but their use in large rivers has been limited. In 2023, in response to a detection of invasive quagga mussels, a 10-km reach of the Snake River (Idaho, USA), was treated with an unprecedented 19,300 kg of chelated copper molluscicide to a target concentration of 1,000 µg/L for 10 days. We assessed the transport and fate of the copper and its exposure and effects on the nontarget benthic community downstream.
View Article and Find Full Text PDFJ Hazard Mater
September 2025
Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221-0012, USA.
Periphytic biofilm (PB) is ubiquitous in paddy fields and has significant impacts on the behavior of cadmium at the soil-water interface. However, its effects on rice growth and Cd accumulation remain largely unknown. Here, we conducted pot and field experiments to explore how PB affects rice growth and Cd migration pathways.
View Article and Find Full Text PDFWater Res
September 2025
Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China. Electronic address:
Climate change increases the frequency of storm events, which flush land pollutants, including phosphorus (P), into freshwater bodies; nonetheless, understanding the biogeochemical transformation of P in dissolved and particulate forms during storm events is still challenging. We collected surface water samples during storm and dry weather flow from five study sites along a pH gradient for measurement of P species, including: dissolved inorganic P (DIP) and organic P (DOP); colloidal organic and inorganic P (COP and CIP); and particulate organic and inorganic P (POP and PIP). In dry weather flow, DIP levels rise due to low concentrations of suspended particulate matter (SPM) (11-23 mg L) and desorption from the particulate matter.
View Article and Find Full Text PDFPer-and polyfluoroalkyl substances (PFAS) are ubiquitous contaminants in freshwater ecosystems. Many PFAS are incorporated into food webs, with potential effects on ecological and human health. However, PFAS incorporation into the base of aquatic food webs remains poorly understood.
View Article and Find Full Text PDF