Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6661654 | Journal of Electroanalytical Chemistry | 2018 | 22 Pages |
Abstract
Methyl parathion adsorption from the solution of 0.5â¯M H2SO4 (Mâ¯=â¯molâ¯dmâ3) on the surface of platinum electrode has be proven. When Pt electrode covered by adsorbed product is cycled between potentials of 0.4â¯V to â0.23â¯V, the split of adsorbed molecules of methyl parathion occur and molecules of p-nitrophenol are released. We assume that molecules of methanol are also released besides p-nitrophenol and molecules of methylthiophosphoric acid remain adsorbed on the surface of the platinum electrode. If oxidation of adsorbed product is realized by cycling between potentials of â0.23â¯V to 1.32â¯V, the split of adsorbed molecules of methyl parathion occur and molecules p-nitrophenol and methanol are released. The adsorbed methylthiophosphoric acid is completely mineralized. Degradation of methyl parathion was observed in the electrochemical cell with separated electrode compartments. After 12â¯h of cycling between potentials of â0.23â¯V to 1.32â¯V, the concentration of the methyl parathion decreased to 2.5% of starting value (5.3â¯Ãâ¯10â5â¯M).
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
TomáÅ¡ LouÄka, Marek DoÅ¡ek, Sylvie KÅÞenecká, Pavel JanoÅ¡,