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Abiotic Methylation of Tetrabromobisphenol A (TBBPA) with the Occurrence of Methyl Iodide in Aqueous Environments.
Hou, Xingwang; Kong, Wenqian; Wang, Xiaoyun; Liu, Yanwei; Chen, Weifang; Liu, Jiyan; Schnoor, Jerald L; Jiang, Guibin.
Affiliation
  • Hou X; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
  • Kong W; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Wang X; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
  • Liu Y; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Chen W; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
  • Liu J; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Schnoor JL; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
  • Jiang G; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Sci Technol Lett ; 6(9): 558-564, 2019 Sep 10.
Article in En | MEDLINE | ID: mdl-33163543
Tetrabromobisphenol A (TBBPA) is the most widely used brominated flame retardant in the world. Its biotic methylation products, tetrabromobisphenol A mono- and dimethyl ether (TBBPA MME and TBBPA DME, respectively), are frequently detected in the environment, but the importance of abiotic methylation reactions of TBBPA in the environment is not known. In this study, the methylation of TBBPA mediated by methyl iodide (CH3I), a ubiquitous compound in aqueous environments, was investigated in simulated waters in the laboratory. It was found that abiotic methylation occurred under both light and dark conditions and was strongly affected by the pH, temperature, and natural organic matter concentration of the water. Abiotic methylation was further verified in natural river water, and the yield of TBBPA MME mediated abiotically by CH3I was much greater than that of biotic methylation. According to our calculations and by comparison of the activation energies (E a) for the abiotic methylation of TBBPA and the other four typical phenolic contaminants and/or metabolites (bisphenol A, triclosan, 5-OH-BDE-47, and 4'-OH-CB-61) mediated by CH3I, those phenolic compounds all show great methylation potentials. The results indicate a new abiotic pathway for generating TBBPA MME and TBBPA DME from TBBPA, and they also confirm the potentials for abiotic methylation of other phenolic contaminants in aqueous environments.

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Environ Sci Technol Lett Year: 2019 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Environ Sci Technol Lett Year: 2019 Document type: Article