Degradation of methylparathion in aqueous solution by electrochemical oxidation.
The electrochemical degradation of methylparathion has been investigated by using Ti/Pt as anode, Stainless Steel 304 as cathode, and sodium chloride as electrolyte. The pesticide is rapidly degraded, but full mineralization is not observed. Degradation products have been monitored through gas chromatography and mass spectrometry, and the overall degradation process has been monitored through dissolved and particulate organic carbon, sulfur, and phosphorus measurements. Several intermediates have been identified, and oxalic, formic, and acetic acids as well as tetraphosphorus trisulfide have been recognized as final products of the degradation process. A proposed mechanism of the process is presented.
Vlyssides
Apostolos
A
School of Chemical Engineering, National Technical University of Athens, 157 70 Athens, Greece. avlys@tee.gr
Barampouti
Elli Maria
EM
Mai
Sofia
S
Arapoglou
Dimitris
D
Kotronarou
Anastasia
A
D004563:Electrochemistry / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D007306:Insecticides / Q000737:chemistry*; D008743:Methyl Parathion / Q000737:chemistry*; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry; D012996:Solutions; D013193:Stainless Steel / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D018505:Waste Management / Q000379:methods; D018508:Water Purification / Q000379:methods*
D007306:Insecticides; D012996:Solutions; D013193:Stainless Steel; D008743:Methyl Parathion; D012965:Sodium Chloride; D010984:Platinum; D014025:Titanium