Water Research 2013-01-01

Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl2(·-) radical.

Paula Caregnato, Janina A Rosso, Juán M Soler, Antonio Arques, Daniel O Mártire, Mónica C Gonzalez

Index: Water Res. 47(1) , 351-62, (2013)

Full Text: HTML

Abstract

The reaction of phosphor-containing pesticides such as methidathion (MT) and dimethoate (DM) with dichloride radical anions (Cl(2)(·-)) was investigated. The second order rate constants (1.3 ± 0.4) × 10(8) and (1.1 ± 0.4) × 10(8) M(-1) s(-1) were determined for the reaction of Cl(2)(·-) with MT and DM, respectively. A reaction mechanism involving an initial charge transfer from the sulfide groups of the insecticides to Cl(2)(·-) is proposed and supported by the identified transient intermediates and reaction products. The formation of chlorinated byproducts was determined. The unexpected consequences of an efficient Cl(2)(·-) reactivity towards MT and DM on the degradation capacity by Advanced Oxidation Procedures applied to polluted waters containing the insecticides and Cl(-) anions is discussed.Copyright © 2012 Elsevier Ltd. All rights reserved.

Related Compounds

  • Methidathion
  • Dimethoate

Related Articles:

Comparative toxicity of methidathion and glyphosate on early life stages of three amphibian species: Pelophylax ridibundus, Pseudepidalea viridis, and Xenopus laevis.

2013-09-15

[Aquat. Toxicol. 140-141 , 220-8, (2013)]

Fast agitated directly suspended droplet microextraction technique for the rapid analysis of eighteen organophosphorus pesticides in human blood.

2015-01-16

[J. Chromatogr. A. 1377 , 27-34, (2015)]

Development of a more specific and accurate multiple reaction monitoring method based on GC-EI/MS/MS for simultaneously monitoring and determining 34 kinds of pesticides in Qianjinzhidai pills.

2015-03-01

[J. Chromatogr. B. Analyt. Technol. Biomed. Life Sci. 983-984 , 47-54, (2015)]

Detections of eleven organophosphorus insecticides and one herbicide threatening Pacific salmonids, Oncorhynchus spp., in California, 1991-2010.

2011-10-01

[Bull. Environ. Contam. Toxicol. 87(4) , 355-60, (2011)]

The effects of subchronic methidathion toxicity on rat liver: role of antioxidant vitamins C and E.

2006-05-01

[Cell Biol. Toxicol. 22(3) , 221-7, (2006)]

More Articles...