同位素方法分析自然衰减过程的微生物降解作用  

Analysis of Microbial Degradation by Monitoring Natural Attenuation Using Isotope Method

作　　者：姜伟男 陈铭 田武成 Jiang Weinan;Chen Ming;Tian Wucheng(Northeast China Electric Power Design Institiute Co.,Ltd.of China Power Engineering Cousulting Group)

机构地区：[1]中国电力工程顾问集团东北电力设计院有限公司,长春市130000

出　　处：《勘察科学技术》2024年第S1期106-110,共5页Site Investigation Science and Technology

摘　　要：微生物降解作用是实现污染物自然衰减的主要途径,因此识别和定量描述微生物降解作用对于监测污染物自然衰减(MNA)尤为重要。同位素方法是定量描述有机物降解的有效手段,目前缺乏对于野外尺度下的^(13)C同位素数据的可靠性进行评估的研究。该文选取苯(PhH)和二氯乙烯(DCE)为重点研究对象,并将野外实测的时空监测数据、同位素数据与一级降解模型计算的理论降解率进行对比,^(13)C同位素可以分析野外污染物降解情况,但因野外条件复杂,降解率存在10%~20%的偏差。该文关于典型有机污染物PhH和DCE降解的同位素方法研究成果,可为地下水污染修复治理提供借鉴。Microbial degradation is the main way to achieve natural attenuation of pollutants,so identification and quantitative description of microbial degradation is particularly important for the monitoring natural attenuation(MNA)of pollutants.The isotope method is an effective mean to quantitatively describe the degradation of organic matter.However at present,there is a lack of research on the reliability evaluation of ^(13)C isotope data at field condition.In this paper,benzene(PhH)and dichloroethylene(DCE)are selected as the key research objects,and the spatial-temporal monitoring data and isotope data measured at the field are compared with the theoretical degradation rate calculated by the primary degradation model.^(13)C isotope can analyze the degradation of pollutants in the field,but there is a deviation of about 10%20%in the degradation rate due to the complex field conditions.The research results of isotope method on degradation of typical organic pollutants PhH and DCE can provide reference for remediation of groundwater pollution.

关 键 词：MNA 有机污染 生物降解 同位素 

分 类 号：P597[天文地球—地球化学] X172[天文地球—地质学] X523[环境科学与工程—环境科学]