摘要
以常州某典型复杂有机污染场地为例,该场地地下水中1,2-二氯乙烷、三氯甲烷以及苯系物等多种复合有机污染物严重超标。2020年经场地调查与风险评估划定了重点管控区,自2021年3月起采取地下水抽提结合自然衰减的风险管控措施。通过对管控修复工程效果进行评估,结果表明:管控修复工程有效控制了污染羽的扩散,对于单组分污染物管控区,污染物的削减明显,地下水污染物的管控修复取得明显成效;场地污染物的去除主要通过自然衰减过程实现,抽提对污染物去除的贡献较低。对于复合污染场地,在调查阶段应对污染特征进行精细刻画,以减少非水相污染源遗漏以及多组分溶解增强效应对风险管控效果的影响,制定合理有效的管控修复决策。本研究为复杂有机物污染场地风险管控体系建设与风险管控效果评估提供借鉴和科学指导。
Taking a typical complex organic pollution site in Changzhou as an example,many complex organic pollutants such as 1,2-dichloroethane,trichloromethane and benzene series in the groundwater of the site exceeded the standard seriously.In 2020,after site investigation and risk assessment,the key management and control area has been designated,and the risk management and control measures of groundwater extraction combined with natural attenuation have been adopted since March 2021.Through the evaluation of the effect of the controlled restoration project,the results show that:the controlled restoration project effectively controls the diffusion of pollution plume,and for the single-component pollutant control area,the reduction of pollutants is obvious,and the control and restoration of groundwater pollutants has achieved obvious results.The removal of site pollutants is mainly achieved through natural attenuation process,and the contribution of extraction to the removal of pollutants is low.For the compound contaminated site,the pollution characteristics should be finely depicted in the investigation stage,so as to reduce the impact of nonaqueous pollution source omission and multi-component dissolution enhancement effect on the risk management and control effect,and make reasonable and effective management and control and restoration decisions.It provides reference and scientific guidance for the construction of complex organic pollution site risk control system and the evaluation of risk control effect.
作者
周美春
李加鹏
周杜牧
刘翠
郑枫蔚
ZHOU Meichun;LI Jiapeng;ZHOU Dumu;LIU Cui;ZHENG Fengwei(Jiangsu Zhongwu Environmental Protection Industry Development Co.LTD,Changzhou 213200,China;Office of the Second Environmental Supervisor,Department of Ecology and Environment of Jiangsu Province,Changzhou 213200,China)
出处
《环境保护科学》
CAS
2024年第2期167-174,共8页
Environmental Protection Science
关键词
复杂有机污染
风险管控
效果评估
自然衰减
抽出处理
complex organic contamination
risk management and control
effect evaluation
natural attenuation
pump and treat technology
