Identifying the causes of sediment-associated toxicity in urban waterways in South China: incorporating bioavailabillity-based measurements into whole-sediment toxicity identification evaluation

Environmental Toxicology and Chemistry
Xiaoyi YiJing You

Abstract

Sediments in urban waterways of Guangzhou, China, were contaminated by a variety of chemicals and showed prevalent toxicity to benthic organisms. A combination of whole-sediment toxicity identification evaluation (TIE) and bioavailability-based extraction was used to identify the causes of sediment toxicity. Of the 6 sediment samples collected, 4 caused 100% mortality to Chironomus dilutus in 10-d bioassays, and the potential toxicants were assessed using TIE in these sediments after dilution. The results of phase I characterization showed that organic contaminants were the principal contributors to the mortality of the midges in 2 sediments and that metals and organics jointly caused the mortality in the other 2 sediments. Ammonia played no role in the mortality for any samples. Conventional toxic unit analysis in phase II testing identified Cr, Cu, Ni, Pb, and Zn as the toxic metals, with cypermethrin, lambda-cyhalothrin, deltamethrin, and fipronils being the toxic organics. To improve the accuracy of identifying the toxicants, 4-step sequential extraction and Tenax extraction were conducted to analyze the bioavailability of the metals and organics, respectively. Bioavailable toxic unit analysis narrowed the list of toxic con...Continue Reading

References

May 3, 2000·Archives of Environmental Contamination and Toxicology·D D MacDonaldT A Berger
Feb 16, 2006·Environmental Science & Technology·D P WestonM J Lydy
May 18, 2006·Environmental Toxicology and Chemistry·Fredrik Reichenberg, Philipp Mayer
Oct 24, 2007·Environmental Science & Technology·Peter F LandrumTheodora E M Ten Hulscher
May 29, 2008·Environmental Science & Technology·Gustavo PérezManuel Valiente
Oct 30, 2009·Journal of Environmental Sciences (China)·Hongyi NiuXingeng Chen
Oct 26, 2010·Analytica Chimica Acta·Ross A Sutherland
Nov 6, 2010·Archives of Environmental Contamination and Toxicology·Yuping DingMichael J Lydy
Feb 5, 2011·Environmental Science & Technology·W Tyler MehlerJing You
Mar 18, 2011·Journal of Environmental Monitoring : JEM·Jing YouMichael J Lydy
Jan 17, 2012·Environmental Science & Technology·J GanJ X Li
Mar 30, 2012·Environmental Science & Technology·Kathryn M KuivilaRobert J Gilliom
Oct 13, 2012·Environmental Toxicology and Chemistry·Robert M BurgessDominic M Di Toro

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Citations

Feb 13, 2016·Environmental Pollution·Yuwei XieXiaowei Zhang
Nov 9, 2017·Environmental Science. Processes & Impacts·Jing You, Huizhen Li
Oct 3, 2020·Heliyon·Emanoelle Pereira da SilvaDaniela Melo E Silva

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