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论文类型：期刊论文

发表时间：2013-08-01

发表刊物：BIORESOURCE TECHNOLOGY

收录刊物：SCIE、EI、PubMed

卷号：142

页面范围：192-197

ISSN号：0960-8524

关键字：Shewanella sp.; Tetrabromobisphenol A; Redox mediators; Biotransformation

摘要：The anaerobic biotransformation of tetrabromobisphenol A (TBBPA) was mainly observed in the consortia so far. The role of redox mediators in anaerobic TBBPA biotransformation by Shewanella sp. distributed widely in environments was investigated for the first time. The results showed the flavins secretion of Shewanella sp. XB was highly dependent on initial TBBPA concentration. The corresponding first-order rate constants (k) of TBBPA transformation decreased to 0.007 d(-1) when TBBPA concentration increased up to 80 mg/L. Moreover, the removal rate of TBBPA (80 mg/L) was significantly enhanced in treatments amended with cyanocobalamin, riboflavin, 2-hydroxy-1,4-naphthoquinone and Aldrich humic acid with k values of 0.42, 0.19, 0.16, and 0.07 d(-1), respectively. In addition, some redox proteins were secreted and played a role in flavins-mediated extracellular biotransformation of TBBPA by Shewanella sp. XB. These findings are beneficial to better understand TBBPA fate in natural environments and to develop efficient biotreatment strategies of TBBPA pollutions. (C) 2013 Elsevier Ltd. All rights reserved.