Dechlorination of spiked PCBs in lake sediment by anaerobic microbial granules

被引：30

作者：

Natarajan, MR ^{[1
]}

Wu, WM ^{[1
]}

Wang, H ^{[1
]}

Bhatnagar, L ^{[1
]}

Jain, MK ^{[1
]}

机构：

[1] MBI Int, Lansing, MI 48909 USA

来源：

WATER RESEARCH | 1998年 / 32卷 / 10期

关键词：

polychlorinated biphenyls; PCBs; bioremediation; reductive dechlorination; lake sediments; anaerobic microbial granules;

D O I：

10.1016/S0043-1354(98)00057-8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An anaerobic microbial consortium developed in our laboratory showed dechlorination of spiked polychlorinated biphenyls (PCBs), such as Aroclor 1254 and a defined congener 2,3,4,5,6-pentachlorobiphenyl (CB) in the presence and the absence of lake sediment. Glucose and methanol were used as carbon and energy sources. Highly chlorinated congeners (containing >5 chlorines) such as penta-, hexa- and heptachlorobiphenyls were preferentially dechlorinated both in the presence and the absence of sediment with a simultaneous change in the distribution of relative amounts of tri- and tetrachlorobiphenyl congeners. The dechlorination pattern and rates observed in both sediment and sediment-free conditions were similar. In 24 weeks, almost 70% of the PCBs were dechlorinated without accumulation of any specific PCB congeners. Monochlorobiphenyls were dechlorinated at a higher rate than di- and tetrachlorobiphenyls. (C) 1995 Elsevier Science Ltd. All rights reserved.

引用

页码：3013 / 3020

页数：8

共 23 条

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