Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10216/120285
Autor(es): | Bridou R. Rodriguez-Gonzalez P. Stoichev T. Amouroux D. Monperrus M. Navarro P. Tessier E. Guyoneaud R. |
Título: | Methylation and dealkykation of tin compounds by sulfate- and nitrate-reducing bacteria |
Editor: | Elsevier |
Data de publicação: | 2018 |
Resumo: | 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 |
Assunto: | 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 |
Fonte: | Chemosphere, vol. 208, p. 871-879 |
Tipo de Documento: | Artigo em Revista Científica Internacional |
Condições de Acesso: | restrictedAccess |
Aparece nas coleções: | CIIMAR - Artigo em Revista Científica Internacional |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Bridou R_2018.pdf Restricted Access | 911.54 kB | Adobe PDF | Request a copy |
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.