Electrochemical detoxification of four phosphorothioate obsolete pesticides stocks

• Published in: Chemosphere
• Main Authors: Vlyssides, A, Arapoglou, D, Mai, S, Barampouti, EM
• Format: Article in Journal/Newspaper
• Language: English
• Published: PERGAMON-ELSEVIER SCIENCE LTD 2005
• Subjects: Demeton-S-methyl; Diazinon; Electrochemical oxidation; Fenthion; Metamidophos; Pesticides; Environmental Sciences; Electrochemical detoxification; Energy demands; Phosphorothioate pesticides; Crops; Detoxification; Electrochemistry; Electrolysis; Forestry; Fruits; Oxidation; Phosphorus compounds; Platinum; Stainless steel; Titanium; dimpylate; methamidophos; phosphorothioic acid derivative; chemical oxygen demand; electrochemical process; pesticide; waste disposal; article; laboratory; oxidation kinetics; Electrodes; Hydrogen-Ion Concentration; Industrial Waste; Oxidation-Reduction; Phosphates; Time Factors; Fluid; Water Purification; Biocides; Detoxication; Farm Crops; Gadus morhua
• Online Access: http://dspace.lib.ntua.gr/handle/123456789/16509; https://doi.org/10.1016/j.chemosphere.2004.09.037

The phosphorothioate pesticides are widely used for crop production and fruit tree treatment. but their disposal causes serious environmental problems. Four commercial phosphorothioate pesticides (Demeton-S-methyl, metamidophos, Fenthion and Diazinon) were treated by an electrolysis system using Ti/Pt as anode and stainless steel 304 as cathode. A number of experiments were run in a laboratory scale pilot plant and the results are presented. For Fenthion the achieved reduction was over 60%, while for Demeton-S-methyl, Metamidophos and Diazinon was more than 50%. Diazinon had the lowest energy demand. The COD/BOD5 ratio was improved considerably after electrolysis for all four pesticides examined. As a conclusion, electrochemical oxidation could be used as a pretreatment method of the pesticides detoxification. (C) 2004 Elsevier Ltd. All rights reserved.