Photodegradation of rotenone in soils under environmental conditions.

Photodegradation of rotenone in soils under environmental conditions. Research Abstract Details 

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Photodegradation of rotenone in soils under environmental conditions. Abstract Text:

Ivana Cavoski,Pierluigi Caboni,Giorgia Sarais,Paolo Cabras,Teodoro Miano,

An environmental fate study was performed to analyze the effects of soil components on the photochemical behavior of rotenone. Photodegradation experiments were carried out on three types of soil collected in southern Italy, Valenzano (VAL), Turi (TUR), and Conversano (CON), from April to June 2006. Soil thin-layer plates (1 mm thick) were spiked with 1.5 mg/kg of rotenone and exposed under natural conditions of sunlight and temperature. The plates were removed from the sunlight at predetermined intervals of continuous irradiation. Other soil samples, control and sterilized, were kept in the dark to evaluate possible effects of chemical and microbiological degradation during the irradiation experiment. The time for 50% loss of the initially applied rotenone varied from 5 to 7 h, following the order TUR < CON < VAL. In environmental studies, changes in temperature and/or moisture affected the degradation rate and caused deviations from first-order kinetics. The photolysis reaction fit the two compartment or the multiple compartment model pathways better. A fast initial decrease during the first 5 h of rotenone irradiation was followed by a much slower decline, which clearly indicates the rather complex chemical process of rotenone photodegradation on soil surfaces. Also, the degradation was shown to be directly related to the soil concentration of clay and organic matter. Rotenolone (12abeta-hydroxyrotenone) was detected by HPLC/DAD/MS analysis as the only photodegradation byproduct of rotenone in soil thin layers. Results provide additional insights on the rates and the mechanisms of rotenone degradation, aiming to describe more clearly the degradation performance of chemical residues in the environment.

Photodegradation of rotenone in soils under environmental conditions. Publishing Authors By Initials

I Cavoski,P Caboni,G Sarais,P Cabras,T Miano,

For similar complex mixtures: soil research abstracts see: complex mixtures: soil research

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Photodegradation of rotenone in soils under environmental conditions. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of agricultural and food chemistry

VOLUME: 55

Page Numbers: 7069-74

Journal Abbreviation: J. Agric. Food Chem.

ISSN: 0021-8561

DAY: 21

MONTH: 07

YEAR: 2007

Photodegradation of rotenone in soils under environmental conditions. Information

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LANGUAGE: eng

NlmUniqueID: 374755

Photodegradation of rotenone in soils under environmental conditions. Keywords Mesh Terms:

KEYWORDS: Soil

MESH TERMS: analysis

Chemical & Substance for Abstract: Photodegradation of rotenone in soils under environmental conditions. Information

Substance Name: Rotenone

Registry Number: 83-79-4

Grant and Affiliation Information for Photodegradation of rotenone in soils under environmental conditions.

AFFILIATION: Dipartimento di Biologia e Chimica Agroforestale ed Ambientale, Università degli Studi di Bari, Via Amendola 165/A, 70126 Bari, Italia. ivana.cavoski@agr.uniba.it

Country: United States

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MEDLINETA: J Agric Food Chem

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