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Sorption and photolysis studies in soil and sediment of the herbicide napropamide

AuthorsAguer, J. P.; Cox, L. ; Hermosín, M.C. ; Cornejo, J.
Issue Date2000
PublisherTaylor & Francis
CitationJournal of Environmental Science and Health - Part B 35(6): 725-738 (2000)
AbstractThe influence of soil and sediment composition on sorption and photodegradation of the herbicide napropamide [N,N-diethyl-2-(1-naphthyloxy)propionamide] was investigated. Five soils and one sediment were selected for this study and the clay fractions were obtained by sedimentation. Sorption-desorption was studied by batch equilibration technique and photolysis in a photoreactor emitting within 300-450 nm wavelenght with a maximum at 365 nm. Sorption increased with clay content and was not related to organic matter content. High irreversibility of sorption was related to the greater montmorillonite content. The presence of soil or sediment reduced photolysis rate due to screen effect and this process did not depend on solid composition but on particle size distribution.
Identifiersdoi: 10.1080/03601230009373304
issn: 0360-1234
e-issn: 1532-4109
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