| 曹阳,孟嘉伟,张晓飞,李明明,申月芳.污染场地重金属风险评估及修复技术筛选[J].矿产勘查,2025,16(3):543-551 |
| 污染场地重金属风险评估及修复技术筛选 |
| Risk assessment and screening of heavy metals remediation technology in contaminated sites |
| 投稿时间：2024-06-16 |
| DOI：10.20008/j.kckc.202503011 |
| 中文关键词: 修复技术筛选 重金属风险评估 层次分析法 逼近理想解的排序方法 |
| 英文关键词: screening of remediation techniques heavy metal risk assessment AHP TOPSIS |
| 基金项目:本文受天津市地质矿产勘查开发局科技创新项目(测试科任[2020]01号)资助。 |
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| 中文摘要: |
| 本文以天津市某电镀厂为研究对象，运用健康风险评估模型评估场地不同深度重金属的人体健康风险，结合层次分析法和逼近理想解的排序方法对场地修复技术进行系统研究和筛选。结果表明 Cr6+在 0~8.00 m范围内成人和儿童总致癌风险均超过可接受水平 1×10-6，在 0~2.40 m超过最大可容忍风险水平 1×10-4具有明显的致癌风险，对儿童在表层 0~0.50 m存在非致癌风险；镍在 0.50~2.40 m对儿童存在非致癌风险。根据场地实际情况，筛选化学氧化还原、固化稳定化、土壤淋洗和电动修复技术 4种备选方案，利用层次分析法计算各指标对修复目标的权重，结合逼近理想解的排序方法评价最优修复方案，结果表明化学氧化还原方案在污染物去除率、健康影响、修复时间、运行费用和技术成熟度方面具有相对优势，是本场地修复的最优方案。 |
| 英文摘要: |
| Taking an electroplating factory in Tianjin as the research object, the health risk assessment modelwas used to assess the human health risk of heavy metals at different depths of the site. AHP and TOPSIS were uti-lized for systematic research and screening of site restoration techniques. The results indicate that the total carcino-genic risk of Cr6+ in adults and children exceeds the acceptable level of 1×10-6 in the range of 0-8.00 m. The total carcinogenic risk of Cr6+ exceeds the maximum tolerable risk level of 1×10-4 in the range of 0-2.40 m, which has ob-vious carcinogenic risk. For children, the non-carcinogenic risk index of 0-0.50 m is greater than 1, which has non-carcinogenic risk. Ni has a non carcinogenic risk to children in the range of 0.50-2.40 m. According to the actualsituation of the site, chemical oxidation, solidification and stabilization, soil washing and electrokinetic remediationtechnology options are screened. AHP was used to calculate the weight of each index to the repair target. TOPSISmethod was used to evaluate the optimal repair scheme. The results showed that the chemical oxidation scheme hadrelative advantages in pollutant removal rate, health impact, repair time, operation cost and technical maturity. Thechemical oxidation was the optimal scheme for site repair. |
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