Effect of metallic cations on the sorption of pesticides on soil

We studied the adsorption and desorption of two pesticides, namely isoproturon and dimetomorph, onto a model soil sample. We first show that the adsorption of isoproturon depends on pH, from 1 mg g^sup -1^ at pH 4 to 2 mg g^sup -1^ at pH 10, contrary to the adsorption of dimetomorph (5.8 mg g^sup -1...

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Bibliographic Details
Published in:Environmental chemistry letters 2005-11, Vol.3 (2), p.86-90
Main Authors: Flogeac, Karine, Guillon, Emmanuel, Aplincourt, Michel
Format: Article
Language:English
Subjects:
Adsorption
Cations
Chromium
Copper
Manganese
Pesticides
Retention capacity
Sorption
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Summary:We studied the adsorption and desorption of two pesticides, namely isoproturon and dimetomorph, onto a model soil sample. We first show that the adsorption of isoproturon depends on pH, from 1 mg g^sup -1^ at pH 4 to 2 mg g^sup -1^ at pH 10, contrary to the adsorption of dimetomorph (5.8 mg g^sup -1^). We also studied the influence of metallic cations, copper(II), iron(III), manganese(II), and chromium(III), on the sorption of isoproturon and dimetomorph. We found that in the case of isoproturon, the presence of metallic cations does influence the retention capacity of the soil sample. The sorption becomes very weak in the presence of copper and chromium, whereas in the case of iron and manganese the sorption properties are slightly modified.[PUBLICATION ABSTRACT]
ISSN:1610-3653
1610-3661
DOI:10.1007/s10311-005-0102-2