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Adsorption and desorption of organotin compounds in organic and mineral soils
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 1877775
Author(s) Huang, Jen-How; Matzner, Egbert
Author(s) at UniBasel Huang, Jen-How
Year 2004
Title Adsorption and desorption of organotin compounds in organic and mineral soils
Journal European Journal of Soil Science
Volume 55
Number 4
Pages / Article-Number 693-698
Abstract Organotin compounds (OTC) are deposited from the atmosphere into terrestrial ecosystems and can accumulate in soils. We studied the adsorption and desorption of methyltin and butyltin compounds in organic and mineral soils in batch experiments. The adsorption and desorption isotherms for all species and soils were linear over the concentration range of 10–100 ng Sn ml−1. The strength of OTC adsorption correlated well with the carbon content and cation exchange capacity of the soil and was in the order mono- > di- > tri-substituted OTCs and butyltin > methyltin compounds. The OTC adsorption coefficients were much larger in organic soils (Kd > 104) than in mineral soils. The adsorption and desorption showed a pronounced hysteresis. Trimethyltin adsorption was partly reversible in all soils (desorption 2–12% of the adsorbed amounts). Dimethyltin, tributyltin and dibutyltin exhibited reversible adsorption only in mineral soils (desorption 4–33% of the adsorbed amounts). Mono-substituted OTCs adsorbed almost irreversibly in all soils (desorption < 1% of adsorbed amounts). Trimethyltin was more mobile and more bioavailable in soils than other OTCs. It might therefore be leached from soils and accumulate in aquatic ecosystems. The other OTCs are scarcely mobile and are strongly retained in soils.
Publisher Wiley
ISSN/ISBN 1351-0754 ; 1365-2389
edoc-URL http://edoc.unibas.ch/49049/
Full Text on edoc No
Digital Object Identifier DOI 10.1111/j.1365-2389.2004.00634.x
ISI-Number 000224921400006
Document type (ISI) Article
 
   

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