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Degradation of toxaphene in aged and freshly contaminated soil
Örebro University, Department of Natural Sciences. (MTM)ORCID iD: 0000-0001-6217-8857
2006 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 63, no 4, p. 609-615Article in journal (Refereed) Published
Abstract [en]

Degradation of toxaphene in soil from both newly contaminated (from Sweden) and aged spills (from Nicaragua) were studied. The newly contaminated soil contained approximately 11 mg kg(-1) toxaphene while the aged Nicaraguan soil contained approximately 100 mg kg(-1). Degradation was studied in anaerobic bioreactors, some of which were supplied with lactic acid and others with Triton X-114. In this study we found that the lower isomers Parlar 11, 12 were degraded while the concentration of isomer Parlar 15 increased. This supported an earlier evaluation which indicated that less chlorinated isomers are formed from more heavily isomers. Lactic acid when added to the soil, interfere with the degradation of toxaphene. Lactic acid was added; several isomers appeared to degrade rather slowly in newly contaminated Swedish soil. The Swedish soil, without any external carbon source, showed the slowest degradation rate of all the compounds studied. When Triton X-114 at 0.4 mM was added, the degradation rate of the compounds increased. This study illustrates that biodegradation of toxaphene is a complex process and several parameters have to be taken into consideration. Degradation of persistent pollutants in the environment using biotechnology is dependent on bioavailability, carbon sources and formation of metabolites.

Place, publisher, year, edition, pages
2006. Vol. 63, no 4, p. 609-615
National Category
Natural Sciences Chemical Sciences Environmental Sciences
Research subject
Chemistry; Environmental Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-5319DOI: 10.1016/j.chemosphere.2005.08.019PubMedID: 16213563OAI: oai:DiVA.org:oru-5319DiVA, id: diva2:158687
Available from: 2009-02-03 Created: 2009-02-03 Last updated: 2017-12-14Bibliographically approved

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van Bavel, Bert

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