PMID: 15352467Sep 9, 2004Paper

Degradation and sorption of selected organophosphate and carbamate insecticides in urban stream sediments

Environmental Toxicology and Chemistry
Svetlana Bondarenko, Jianying Gan

Abstract

Monitoring studies show that urban surface streams in the United States are commonly contaminated with pesticides, and contamination by organophosphates and carbamates is of particular concern because of their aquatic toxicity. The degradation and sorption of four common organophosphate and carbamate insecticides were studied in urban creek sediments from southern California, USA. In sediment, malathion was quickly degraded under either aerobic or anaerobic conditions, with a half-life (t(1/2)) <3 d. Diazinon and chlorpyrifos were moderately persistent under aerobic conditions (t(1/2) = 14-24 d). However, persistence of chlorpyrifos increased significantly under anaerobic conditions, and t(1/2) was prolonged to 58 to 223 d. The greatest effect of redox potential was found with carbaryl. Although rapid dissipation occurred under aerobic conditions (t(1/2) = 1.8-4.9 d), carbaryl became virtually nondegradable under anaerobic conditions (t(1/2) = 125-746 d). The sorption coefficient consistently increased with time for all pesticides, and chlorpyrifos displayed greater sorption potential than the other pesticides. This study indicates that pesticides in sediment may become less available with time because of increased sorption, an...Continue Reading

Citations

Jun 6, 2009·Archives of Environmental Contamination and Toxicology·Kevin D CrawfordGavin Globensky
Nov 6, 2010·Archives of Environmental Contamination and Toxicology·Yuping DingMichael J Lydy
Jan 8, 2014·Water Research·Manoj K Tiwari, Saumyen Guha
Dec 29, 2012·Journal of Hazardous Materials·M Ekrem KarpuzcuWilliam T Stringfellow
Mar 21, 2008·Ecotoxicology and Environmental Safety·A P K JantunenJ V K Kukkonen
Dec 21, 2007·Ecotoxicology and Environmental Safety·Anneli WidenfalkWillem Goedkoop
Feb 11, 2011·Environmental Toxicology and Chemistry·Brian AndersonRonald Tjeerdema
Jun 3, 2016·Environmental Science and Pollution Research International·Nguyen Thanh TamNguyen Van Cong
Feb 6, 2017·Pest Management Science·Antonio López-PiñeiroMaría Ángeles Rozas
Jul 31, 2008·Journal of Separation Science·Diego García-RodríguezRafael Cela
Aug 11, 2006·Journal of Environmental Quality·Jianhang LuJianying Gan
Aug 30, 2008·Journal of Agricultural and Food Chemistry·Kunde LinJay Gan
Oct 27, 2007·Journal of Agricultural and Food Chemistry·M HarirPh Schmitt-Kopplin
Jan 7, 2020·The Science of the Total Environment·Cagri Sahin, M Ekrem Karpuzcu

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