Reductive debromination of decabromodiphenyl ether by anaerobic microbes from river sediment
Reductive debromination of decabromodiphenyl ether by anaerobic microbes from river sediment
复制标题
DOI：
10.1016/j.ibiod.2013.10.011
复制
发表时间：
2014-02-01
影响因子：
4.8
通讯作者：
Lee, Ching-Chang
中科院分区：
文献类型：
--
作者：
Huang, Huang-Wen;Chang, Bea-Ven;Lee, Ching-Chang
多溴联苯醚（PBDEs）是一种新兴的持久性有机污染物，已引起广泛关注。本研究的目的是评估在各种条件下厌氧微生物对河流沉积物中十溴二苯醚（BDE-209）的还原脱溴作用。添加brij 30、brij 35、鼠李糖脂、表面活性素、维生素B-12、零价铁、乙酸盐、乳酸盐和丙酮酸盐可提高BDE-209的脱溴率。零价铁产生最高的BDE-209脱溴作用。各种多溴二苯醚同系物在沉积物中的脱溴速率从高到低的顺序为BDE-209 > BDE-99 > BDE-47 > BDE-28 > BDE-15。沉积物中BDE-209还原脱溴产生的中间产物为九溴二苯醚（BDE-207）、八溴二苯醚（BDE-207）、（BDE-196、197），七溴二苯醚（BDE-183、184、191），六溴二苯醚（BDE-138、154）、五溴二苯醚（BDE-85、99、100、119）、四溴二苯醚（BDE-47、49、66、71）、三溴二苯醚（BDE-17、28）、二溴二苯醚（BDE-7、15）和单溴二苯醚（BDE-3）。研究结果表明，BDE-209在厌氧微生物作用下可以连续脱溴为BDE-3。本研究为生物修复去除河流底泥中BDE-209提供了可行的方法。(C)2013爱思唯尔有限公司保留所有权利。
Polybrominated diphenyl ethers (PBDEs) are emerging persistent organic pollutants and have consequently drawn much environmental concern. The objective of this study was to evaluate reductive debromination of decabromodiphenyl ether (BDE-209) by anaerobic microbes from river sediment under various conditions. The debromination rates for BDE-209 were enhanced by the addition of brij 30, brij 35, rhamnolipid, surfactin, vitamin B-12, zero-valent iron, acetate, lactate, and pyruvate. Zero-valent iron yielded the highest BDE-209 debromination. For the various PBDE congeners, the high-to-low order of debromination rates in sediment was BDE-209 > BDE-99 > BDE-47 > BDE-28 > BDE-15. The intermediate products resulting from the reductive debromination of BDE-209 in sediment were nona-BDE (BDE-207), octa-BDEs (BDE-196, 197), hepta-BDEs (BDE-183, 184, 191), hexa-BDEs (BDE-138, 154), penta-BDEs (BDE-85, 99, 100, 119), tetra-BDEs (BDE-47, 49, 66, 71), tri-BDEs (BDE-17, 28), di-BDEs (BDE-7, 15), and mono-BDE (BDE-3). Our result shows BDE-209 can be debrominated successively to BDE-3 by anaerobic microbes from river sediment. This research offers feasible methods for removal of BDE-209 in river sediment for bioremediation. (C) 2013 Elsevier Ltd. All rights reserved.