title: Biodegradation of Tributyltin (TBT) by Extremophile Bacteria from Atacama Desert and Speciation of Tin By-products.
abstract: Biodegradation of tributyltin (TBT) by four tin resistant Gram negative bacteria isolated from extremely contaminated river sediments in the Atacama Desert in Chile was studied. Moraxella osloensis showed the greatest resistance and degradation capability of TBT, producing less toxic by-products, such as dibutyltin (DBT) and inorganic tin. In 7 days, approximately 80 % of TBT degradation was achieved, generating close to 20 % of DBT as degradation product. The degradation rate constant (k) was 0.022 [day(-1)] and TBT half-life (t1/2) in culture was 4.3 days. Debutylation is stated a probable mechanism of TBT degradation.
authors.affiliation: Department of Analytical and Inorganic Chemistry, Faculty of Chemical Sciences, University of Concepción, PO Box 160-C, Edmundo Larenas 129, Concepción, Chile, jyanez@udec.cl.
authors.forename: Jorge
authors.initials: J
authors.lastname: Yáñez
authors.forename: Paula
authors.initials: P
authors.lastname: Riffo
authors.forename: Paola
authors.initials: P
authors.lastname: Santander
authors.forename: Héctor D
authors.initials: HD
authors.lastname: Mansilla
authors.forename: María Angélica
authors.initials: MA
authors.lastname: Mondaca
authors.forename: Víctor
authors.initials: V
authors.lastname: Campos
authors.forename: Dulasiri
authors.initials: D
authors.lastname: Amarasiriwardena
mesh_terms: D000421:Alcaligenes / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D016956:Burkholderia cepacia / Q000378:metabolism; D002677:Chile; D003889:Desert Climate; D024881:Drug Resistance, Bacterial; D019015:Geologic Sediments / Q000737:chemistry; D006207:Half-Life; D009016:Moraxella / Q000378:metabolism; D009947:Organotin Compounds / Q000032:analysis*; D011549:Pseudomonas / Q000378:metabolism; D045483:Rivers; D012987:Soil; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis; D013997:Time Factors; D014001:Tin / Q000032:analysis*; D014220:Trialkyltin Compounds / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis; D015007:Yersinia / Q000378:metabolism
chemical_list: D009947:Organotin Compounds; D012987:Soil; D012989:Soil Pollutants; D014220:Trialkyltin Compounds; D014873:Water Pollutants; C056189:di-n-butyltin; C011559:tributyltin; D014001:Tin