Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl₂˙⁻ radical

The reaction of phosphor-containing pesticides such as methidathion (MT) and dimethoate (DM) with dichloride radical anions (Cl₂˙⁻) was investigated. The second order rate constants (1.3 ± 0.4) × 10⁸ and (1.1 ± 0.4) × 10⁸ M⁻¹ s⁻¹ were determined for the reaction of Cl₂˙⁻ with MT and DM, respectively...

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Autores principales: Caregnato, Paula, Rosso, Janina Alejandra, Soler, Juán M., Arques, Antonio, Mártire, Daniel Osvaldo, González, Mónica Cristina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Química
Organophosphorous pesticides
Degradation
Chloride anion
Flash-photolysis
Chlorinated byproducts
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128864
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128864
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Organophosphorous pesticides
Degradation
Chloride anion
Flash-photolysis
Chlorinated byproducts
spellingShingle Ciencias Exactas
Química
Organophosphorous pesticides
Degradation
Chloride anion
Flash-photolysis
Chlorinated byproducts
Caregnato, Paula
Rosso, Janina Alejandra
Soler, Juán M.
Arques, Antonio
Mártire, Daniel Osvaldo
González, Mónica Cristina
Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl₂˙⁻ radical
topic_facet Ciencias Exactas
Química
Organophosphorous pesticides
Degradation
Chloride anion
Flash-photolysis
Chlorinated byproducts
description The reaction of phosphor-containing pesticides such as methidathion (MT) and dimethoate (DM) with dichloride radical anions (Cl₂˙⁻) was investigated. The second order rate constants (1.3 ± 0.4) × 10⁸ and (1.1 ± 0.4) × 10⁸ M⁻¹ s⁻¹ were determined for the reaction of Cl₂˙⁻ with MT and DM, respectively. A reaction mechanism involving an initial charge transfer from the sulfide groups of the insecticides to Cl₂˙⁻ 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 Cl₂˙⁻ 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.
format Articulo
Articulo
author Caregnato, Paula
Rosso, Janina Alejandra
Soler, Juán M.
Arques, Antonio
Mártire, Daniel Osvaldo
González, Mónica Cristina
author_facet Caregnato, Paula
Rosso, Janina Alejandra
Soler, Juán M.
Arques, Antonio
Mártire, Daniel Osvaldo
González, Mónica Cristina
author_sort Caregnato, Paula
title Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl₂˙⁻ radical
title_short Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl₂˙⁻ radical
title_full Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl₂˙⁻ radical
title_fullStr Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl₂˙⁻ radical
title_full_unstemmed Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl₂˙⁻ radical
title_sort chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of cl₂˙⁻ radical
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/128864
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