title: Electrochemical detoxification of four phosphorothioate obsolete pesticides stocks.
abstract: 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.
authors.affiliation: School of Chemical Engineering, National Technical University of Athens, 9, Heroon Polytechniou St., 15770 Zografou, Greece. avlys@tee.gr
authors.forename: Apostolos
authors.initials: A
authors.lastname: Vlyssides
authors.forename: Dimitris
authors.initials: D
authors.lastname: Arapoglou
authors.forename: Sofia
authors.initials: S
authors.lastname: Mai
authors.forename: Elli Maria
authors.initials: EM
authors.lastname: Barampouti
mesh_terms: D004563:Electrochemistry; D004566:Electrodes; D004572:Electrolysis; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D010084:Oxidation-Reduction; D010575:Pesticides / Q000737:chemistry*; D010710:Phosphates / Q000302:isolation & purification* / Q000633:toxicity; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D007220:Industrial Waste; D010575:Pesticides; D010710:Phosphates; C035638:thiophosphoric acid