天津某工业地块土壤与地下水污染区域重叠修复工程分析

Analysis of soil and groundwater contamination overlapping remediation project in an industrial plot in Tianjin

根据地块污染土壤和地下水的理化特征及污染情况,对复合污染、单一重金属污染土壤分别采用淋洗和还原技术修复,地下水采用抽出处理修复技术及修复效果评估等进行分析。结果表明,复合污染土壤经淋洗治理,单一重金属污染土壤经还原治理和地下水经抽出治理后,采集的所有土壤和地下水样品中六价铬、镍、氰化物浓度均低于修复目标限值,修复效果达到设计目标值并取得良好的效果。

Based on the physicochemical characteristics and pollution levels of the contaminated soil and groundwater in the plot,the composite contaminated soil and single heavy metal contaminated soil were treated with washing and reduction techniques,respectively.The groundwater was treated with pump-and-treat remediation technology and evaluated for its remediation effectiveness.The results showed that after the composite contaminated soil was treated with washing,the single heavy metal contaminated soil was treated with reduction,and the groundwater was treated with pumping,the concentrations of hexavalent chromium,nickel,and cyanide in all collected soil and groundwater samples were below the remediation target limits.The remediation effects achieved the designed target values,yielding satisfactory results.