文献类型：期刊文献

中文题名：铁碳微电解与微生物共作用降解BDE-209

英文题名：Microbial degradation of BDE-209 coupled with Fe/C electrolysis

作者：刘莉莉[1];刘瑞红[1];陈轶伦[1];林匡飞[1]

机构：[1]华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

年份：2015

卷号：9

期号：12

起止页码：6161

中文期刊名：环境工程学报

外文期刊名：Chinese Journal of Environmental Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金资助项目(41001316);中央高校科研基本业务费(WB1214059)

语种：中文

中文关键词：BDE-209;铁碳微电解;微生物降解;代谢产物

外文关键词：BDE-209; Fe/C micro-electrolysis; microbial degradation; degradation products;

摘要：BDE-209是世界上应用最为广泛的溴代阻燃剂之一,同时也是环境介质中普遍存在的一类强亲脂性、高生物累积性的持久性有机污染物。鉴于其生物难降解特性,尝试采用铁碳微电解技术强化其微生物降解。研究中,首先采用单因素实验确定了反应体系的铁粉最佳投加量(0.1 g)及最佳的铁碳比(1∶1),进而探讨了铁碳微电解体系促进BDE-209脱溴的降解机制。铁碳微电解体系处理BDE-209时,体系中p H及ORP值有明显的波动,反应120 h后降解率达53.0%;而铁碳微电解体系与微生物共作用体系中,120 h后BDE-209降解率可达到77.5%,降解产物主要为九溴、八溴以及七溴等低溴代联苯醚。实验结果表明,铁碳微电解与微生物共作用能够有效提高BDE-209的生物降解效率。
As one of the most widely used brominated flame retardants all over the world,BDE-209 has become a ubiquitous organic contaminant in environments because of its high lipophilicity,strong bioaccumulation and difficult biodegradation properties. In consideration of the biodegradation characteristics of BDE-209,Fe/C micro-electrolysis was coupled with microbial degradation to investigate the debromination efficiency in this study. Firstly,systems were optimized with iron powder dosage of 0. 1 g and Fe/C ratio of 1∶ 1 to obtain the high debromination efficiency. With the catalysis of Fe/C micro-electrolysis,the removal efficiency of BDE-209 reached53. 0% within 120 h,whereas the pH and ORP value showed obvious fluctuation during this process. Moreover,the removal efficiency of BDE-209 climbed up to 77. 5% with the combination effects of Fe/C micro-electrolysis and microbial degradation. The degradation products of BDE-209 were mainly in forms of lower brominated diphenyl ethers,including hepta-,octa-and nona-brominated diphenyl ethers. These results showed that the combination of Fe/C micro-electrolysis with microbial degradation could improve the degradation efficiency of BDE-209 effectively.