Electrochemical detoxification of four phosphorothioate obsolete pesticides stocks

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...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2005, Vol.58 (4), p.439-447
Main Authors: Vlyssides, Apostolos, Arapoglou, Dimitris, Mai, Sofia, Barampouti, Elli Maria
Format: Article
Language:English
Subjects:
Agriculture, rearing and food industries wastes
Applied sciences
Demeton- S-methyl
Diazinon
Electrochemical oxidation
Electrochemistry
Electrodes
Electrolysis
Exact sciences and technology
Fenthion
Hydrogen-Ion Concentration
Industrial Waste
Metamidophos
Oxidation-Reduction
Pesticides
Pesticides - chemistry
Phosphates - isolation & purification
Phosphates - toxicity
Pollution
Time Factors
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Wastes
Water Purification - instrumentation
Water Purification - methods
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Summary: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/BOD 5 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.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2004.09.037