Degradation of organotin compounds in organic and mineral forest soils

Huang, Jen-How and Matzner, Egbert.. (2004) Degradation of organotin compounds in organic and mineral forest soils. Journal of Plant Nutrition and Soil Science, 167 (1). pp. 33-38.

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Broad industrial application of organotin compounds (OTC) leads to their release into the environment. OTC are deposited from the atmosphere into forest ecosystems and may accumulate in soils. Here, we studied the degradation of methyltin and butyltin compounds in a forest floor, a mineral, and a wetland soil with incubation experiments at 20degreesC in the dark. OTC degraded slowly in soils with half-lives estimated from 0.5 to 15 years. The first order degradation rate constants of OTC in soils ranged from 0.05 to 1.54 yr(-1). The degradation rates in soils were generally in the order mono- greater than or equal to di- > tri-substituted OTC. Stepwise dealkylation was observed in all cases of di-substituted OTC, but only in some cases of tri-substituted OTC. Decomposition rates of OTC in the forest floor were higher than in wetland and mineral soils. Tetramethyltin in the gas phase was not detected, suggesting little tin methylation in the wetland soils. Slow degradation of OTC in soils might lead to long-term storage of atmospherically deposited OTC in soils.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Umweltgeowissenschaften (Alewell)
UniBasel Contributors:Huang, Jen-How
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:27 Nov 2017 07:50
Deposited On:27 Nov 2017 07:50

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