A comparative study of electrochemical oxidation of methidation organophosphorous pesticide on SnO2 and boron-doped diamond anodesReportar como inadecuado

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Chemistry Central Journal

, 9:59



BackgroundElectrochemical oxidation considered to be among the best methods in waste water desalination and removing toxic metals and organic pesticides from wastewater like Methidathion. The objective of this work is to study the electrochemical oxidation of aqueous wastes containing Methidathion using boron doped diamond thin-film electrodes and SnO2, and to determine the calculated partial charge and frontier electron density parameters.

ResultsElectrolysis parameters such as current density, temperature, supporting electrolyte NaCl have been optimized. The influences of the electrode materials on methidathion degradation show that BDD is the best electrode material to oxidize this pesticide organophosphorous. Energetic cost has been determinate for all experiments. The results provide that 2 % of NaCl, 60 mA cm and 25 ºC like the optimized values to carry out the treatment. For BDD the achieved Chemical Oxidation Demand reduction was about 85 %, while for SnO2 it was about 73 %. The BDD anode appears to be the more promising one for the effective electrochemical treatment of methidathion. Finally the theoretical calculation was done by using the calculation program Gaussian 03W, they are a permit to identify the phenomena engaged near the electrode and to completely determine the structures of the products of electrochemical oxidation formed during the degradation and which they are not quantifiable in experiments because of their high reactivity.

ConclusionsThe comparison of the results relating to the two electrodes indicates that these materials have a power to reduce the quantity of the organic matter in the electrolyzed solution. But the speed of oxidation of these compounds is different according to the materials of the electrodes used.

Open image in new windowGraphical abstract:Structural of methidathion O,O-dimethyl-S-5-methoxy-1,3,4-thiadiazolinyl-3-methyl dithiophosphate used for study the electrochemical oxidation

KeywordsElectrooxidation Energy consumption Methidathion BDD anode SnO2 anode AbbreviationsBDDboron doped diamand

SDEsaturated calomel electrode

CODchemical oxygen demand

CVDchemical vapor deposition


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Autor: Fatima Hachami - Mohamed Errami - Lahcen Bazzi - Mustapha Hilali - Rachid Salghi - Shehdeh Jodeh - Belkheir Hammouti - Othm

Fuente: https://link.springer.com/

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