Acute and Chronic Toxicity Testing of Drinking Water Treatment Residuals in Freshwater Systems

• DOI: 10.1002/etc.5061
• Publication Date: 2021-04-05T12:51:57Z
• Authors: Lang Zhou; Samuel M. Wallace; Kevin J. Kroll; Nancy D. Denslow; Jean-François Gai...; Peter Meyer; Jean-Claude J. Bo...
• Keywords: Hyalella azteca; Environmental toxicology; Ecotoxicity; Chronic toxicity

Abstract The beneficial use of drinking water treatment residuals (DWTRs) faces barriers due primarily to uncertainties and concerns about their potential environmental impacts. We used total leachable toxic metal concentrations 2 benthic organism–based bioassays identify suitable DWTR substrates for introduction freshwater systems. Using contents the consensus probable effect concentration concept, 3 DWTRs were selected in elutriate toxicity studies. Ag, As, Cd, Cu, Cr, Ni, Pb, Zn below US Environmental Protection Agency's ambient quality criteria. long‐term 65‐d life cycle Chironomus tentans test 4 different endpoints (survival, adult emergence, egg case production, number eggs produced per female), no statistical differences found between treatments controls. Similarly, results obtained using 10‐d Hyalella azteca showed toxicity. However, although both survival growth recorded all bioassays, C. 28‐d H. tests ambiguous. For , resulted significantly lower rates compared significant observed controls treatments, but than Overall, these suggest that certain could be aquatic Environ Toxicol Chem 2021;40:2003–2012. © 2021 SETAC