Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/120285
Author(s): Bridou R.
Rodriguez-Gonzalez P.
Stoichev T.
Amouroux D.
Monperrus M.
Navarro P.
Tessier E.
Guyoneaud R.
Title: Methylation and dealkykation of tin compounds by sulfate- and nitrate-reducing bacteria
Publisher: Elsevier
Issue Date: 2018
Abstract: In this study, axenic cultures of sulfate-reducing (SRB) and nitrate-reducing (NRB) bacteria were examined for their ability to methylate inorganic tin and to methylate or dealkylate butyltin compounds. Environmentally relevant concentrations of natural abundance tributyltin (TBT) and 116Sn-enriched inorganic tin were added to bacterial cultures to identify bacterial-mediated methylation and dealkylation reactions. The results show that none of the Desulfovibrio strains tested was able to induce any transformation process. In contrast, Desulfobulbus propionicus strain DSM-6523 degraded TBT either under sulfidogenic or non-sulfidogenic conditions. In addition, it was able to alkykate 116Sn-enriched inorganic tin leading to the formation of more toxic dimethyltin and trimethyltin. A similar capacity was observed for incubations of Pseudomonas but with a much greater dealkykation of TBT. As such, Pseudomonas sp. ADR42 degraded 61% of the initial TBT under aerobic conditions and 35% under nitrate-reducing conditions. This is the first work reporting a simultaneous TBT degradation and a methylation of both inorganic tin species and TBT dealkykation products by SRB and NRB under anoxic conditions. These reactions are environmentally relevant as they can control the mobility of these compounds in aquatic ecosystems; as well as their toxicity toward resident organisms. © 2018 Elsevier
Subject: Alkylation
Aquatic ecosystems
Aquatic organisms
Bacteria
Insecticides
Methylation
Nitrates
Sulfur compounds
Bacterial cultures
Butyltin compounds
Dealkylation
Nitrate-reducing bacteria
Nitrate-reducing conditions
Sulfate reducing bacteria
Transformation process
Tributyltin
Tin compounds
tin derivative
tributyltin
dimethyltin
nitric acid derivative
organotin compound
sulfate
anoxic conditions
biodegradation
biotransformation
butyltin
concentration (composition)
methylation
microbial activity
nitrate
oxic conditions
speciation (chemistry)
sulfate-reducing bacterium
tin
toxicity
tributyltin
Article
axenic culture
bacterium culture
controlled study
dealkylation
degradation
Desulfobulbus
Desulfobulbus propionicus
Desulfovibrio
methylation
nitrate reducing bacterium
nonhuman
Pseudomonas
sulfate reducing bacterium
chemistry
Gram negative anaerobic bacteria
metabolism
methylation
Bacteria (microorganisms)
Desulfobulbus propionicus
Desulfovibrio
Pseudomonas
Pseudomonas sp.
Desulfovibrio
Methylation
Nitrates
Organotin Compounds
Sulfates
Sulfur-Reducing Bacteria
Trialkyltin Compounds
URI: https://hdl.handle.net/10216/120285
Source: Chemosphere, vol. 208, p. 871-879
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:CIIMAR - Artigo em Revista Científica Internacional

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