甲苯在毛细带中的生物降解作用研究  

Research on the toluene biodegradation in the capillary zone

作　　者：尹交英 樊艳玲[1] 姜林[1] 夏天翔[1] YIN Jiaoying;FAN Yanling;JIANG Lin;XIA Tianxiang(Beijing Municipal Research Institute of Environmental Protection,National Engineering Research Center of Urban Environmental Pollution Control,Beijing Key Laboratory for Risk Modeling and Rernediation for Contaminated Sites,Beijing 100037)

机构地区：[1]北京市环境保护科学研究院,国家城市环境污染控制工程技术研究中心,污染场地风险模拟与修复北京重点实验室,北京100037

出　　处：《环境污染与防治》2018年第6期677-680,共4页Environmental Pollution & Control

基　　金：国家环境保护公益性行业科研专项(No.201509034)

摘　　要：通过土柱(3根土柱分别记为柱1、柱2、柱3)实验,定量研究了甲苯在土壤毛细带中的生物降解作用规律。实验结果显示,距离饱和水位以上4cm处的毛细带内生物降解效率最大,达到59.45%,且生物降解速率也最大,达到0.793μg/(mL·d),而距离饱和水位以上24cm处生物降解速率仅为0.333μg/(mL·d)。土壤中甲苯的生物降解符合一阶动力学模型,含毛细带的柱1甲苯生物降解常数为0.08d^(-1),不含毛细带的柱3甲苯生物降解常数为0.09d^(-1),两者差异不大。Based on soil column experiments（3columns namely Column 1,Column 2and Column 3）,the biodegradation of toluene in the capillary zone was quantitatively studied.The experiment results indicated that the maximum biodegradation efficiency was in the capillary zone 4cm above the saturated water level,reaching 59.45%,where biodegradation rate reached its maximum（0.793μg/（mL·d））.But the biodegradation rate was only 0.333μg/（mL·d）at the location of 24cm above the saturated water level.The biodegradation of toluene was in accordance with the first-order kinetic model,and the biodegradation rate constant was 0.08d^（-1 ）in the soil column containing the capillary zone（Column 1）,which was 0.09d^（-1 ）in the soil column without the capillary zone（Column 3）,and there was no obvious difference between them.

关 键 词：甲苯 毛细带 生物降解 

分 类 号：X53[环境科学与工程—环境工程]