Effect of fulvic acid on the photochemical degradation of methylparathion

Autor:	José A. Manzanilla-Cano, Tania Isolina Coral-Martínez, Manuel H. Barceló-Quintal, Ligia Del C. Alcocer-Can
Rok vydání:	2010
Předmět:	Polarography Insecticides Photolysis Pesticide residue Photochemistry Photodissociation Inorganic chemistry General Medicine Methyl Parathion Pesticide Hydrogen-Ion Concentration Pollution chemistry.chemical_compound Kinetics Reaction rate constant Biodegradation Environmental chemistry Parathion methyl Photochemical degradation Degradation (geology) Benzopyrans Food Science
Zdroj:	Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes. 45(4)
ISSN:	1532-4109
Popis:	Photochemical degradation of methylparathion (O,O,-dimethyl O-4 nitrophenylphosphorothioate) in the presence of fulvic acid (FA) between pH 2 and 7 was studied by differential pulse polarography (DPP). Fulvic acid and its photoproducts were not electro-active under the experimental conditions used in this study, and only the pesticide exhibited polarographic signals. Photolysis of methylparathion in acid media was sensitized by fulvic acid since the pesticide did not degrade in the absence of this compound. Methylparathion degradation was observed at each of the studied pHs. The reaction was first-order with rate constant values ranging from 3.3 x 10(-3) to 8.8 x 10(-3)min(-1).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::151d51485984aeb5f4690fd728ec2f45 https://pubmed.ncbi.nlm.nih.gov/20390963 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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