上海市某地下水砷污染地块修复案例分析

Case Study on One Groundwater Remediation at An Arsenic Contaminated Site in Shanghai

介绍了抽出-处理技术在上海市某地下水砷污染地块修复的应用案例。通过对该污染地开展土壤与地下水场地环境初步调查、详细调查和风险评估,发现该地块部分区域地下水中重金属砷对建筑工人的致癌和非致癌风险超出了可接受水平。通过修复技术筛选、修复技术可行性评估等确定修复方案。该案例采用分区抽提的方式,同时结合多次抽提、药剂注入辅助措施进行治理修复。该污染场地经过修复,监测结果表明地下水砷浓度达到了修复目标值。

An application case of extraction-treatment technology in the remediation of one groundwater arsenic-contaminated site in Shanghai was introduced. Through preliminary investigation, detailed investigation and risk assessment of soil and groundwater environment in the contaminated site, it was found that the carcinogenic and non-carcinogenic risks of heavy metal arsenic in groundwater in some areas of the site to construction workers exceeded acceptable levels. Then, the remediation plan was determined through repair technology screening and repair technology feasibility assessment. In this case, the method of partition extraction was adopted, at the same time, multiple extractions and auxiliary measures of chemical injection were used for treatment and remediation. The polluted site was treated and rehabilitated, and the monitoring results showed that the arsenic concentration in the groundwater had reached the remediation target value.