Effect of sorption and desorption-resistance on biodegradation of chlorobenzene in two wetland soils
Effect of sorption and desorption-resistance on biodegradation of chlorobenzene in two wetland soils
复制标题
DOI：
10.1016/j.jhazmat.2008.03.129
复制
发表时间：
2009-01-15
影响因子：
13.6
通讯作者：
Kim, D. J.
中科院分区：
文献类型：
--
作者：
Lee, Sangjin;Pardue, J. H.;Kim, D. J.
土壤中氯苯类化合物对微生物种群的生物有效性对长期污染的废物场地的修复具有重要意义。CB的生物有效性进行了评估，使用矿化试验两种类型的湿地土壤与对比性能。CB矿化的速率和程度大于数学模型，假设瞬时解吸，然后生物降解预测。在沼泽土和湿地土中，CB的初始矿化速率（IMR）分别为0.14 μ g L-1h（-1）和1.92 μ g L-1h（-1）。这些值表明CB降解细菌可以进入吸附的CB。矿化试验也进行了湿地土壤后，CB老化1，7和31天。结果表明，即使是解吸电阻的吸附CB的一部分被降解，虽然发生在较低的速度和程度较小的降解。(C)2008 Elsevier B. V.保留所有权利。
Bioavailability of chlorobenzenes (CBs) in soils to microbial populations has implications for remediation of waste sites with long histories of contamination. Bioavailability of CB was assessed using mineralization assays for two types of wetland soils with contrasting properties. The rate and extent of CB mineralization were greater than predicted by mathematical models which assume instantaneous desorption followed by biodegradation. The freshly added CB was degraded with initial mineralization rates (IMRs) of 0.14 mu g L-1 h(-1) and 1.92 mu g L-1 h(-1) for marsh soil and wetland soil respectively. These values indicate that CB-degrading bacteria had an access to the sorbed CB. Mineralization assays were also performed for wetland soils after the CB was aged for 1, 7 and 31 days. The results revealed that even a desorption-resistant part of the sorbed CB was degraded although the degradation occurred at lower rates and to a lesser extent. (C) 2008 Elsevier B.V. All rights reserved.