UV/H2O2 advanced oxidation for abatement of organophosphorous pesticides and the effects on various toxicity screening assays

Chemosphere
Austa M ParkerKarl G Linden

Abstract

Advanced oxidation processes (AOPs) are utilized due to their ability to treat emerging contaminants with the fast reacting and non-selective hydroxyl radical (OH). Organophosphorous insecticides are common drinking water contaminants, with 12 different compounds of this class being found on the US EPA's most recent Candidate Contaminant List (CCL4). The use of the AOP UV/H2O2 for the treatment of organophosphorous insecticides was explored in this study, by coupling biological and analytical tools to follow the abatement of the target compounds. Four insecticides were explored for advanced oxidation treatment: acephate, dicrotophos, fenamiphos, and methamidophos. All four compounds were fast reacting with OH, all reacting with second order rate constants ≥5.5 × 10(9) M(-1)s(-1). Three major endpoints of toxicity were studied: estrogenicity, genotoxicity (mutagenicity) and neurotoxicity. None of the target compounds showed any estrogenic activity, while all compounds showed an active genotoxic (mutagenic) response (AMES II assay) and most compounds had some level of neurotoxic activity. AOP treatment did not induce any estrogenic activity, and reduced the compounds' neurotoxicity and genotoxicity in all but one case. Methamidop...Continue Reading

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Oct 5, 2015·Chemosphere·Olya S KeenKarl G Linden
Jan 13, 2016·Water Environment Research : a Research Publication of the Water Environment Federation·Yaal LesterKarl G Linden

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Citations

May 28, 2019·Environmental Science and Pollution Research International·Bo JiangYizhi Song
Sep 24, 2020·International Journal of Environmental Health Research·Kaili ZouXiaoli Fu
Apr 20, 2018·Environmental Science & Technology·Urs von Gunten
Jun 9, 2020·Ecotoxicology and Environmental Safety·Akanksha SharmaNeha Singla

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