| 基于HERA土壤分层风险评估的SVE修复方案优化 |
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| 引用本文： | 史俊祥, 郑娟, 杨洋, 席北斗, 李娟, 唐军, 汪洋. 基于HERA土壤分层风险评估的SVE修复方案优化[J]. 环境工程学报, 2019, 13(12): 2954-2962. doi: 10.12030/j.cjee.201901098 |
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| 作者姓名： | 史俊祥 郑娟 杨洋 席北斗 李娟 唐军 汪洋 |
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| 作者单位： | 1.南昌大学资源环境与化工学院，鄱阳湖环境与资源利用教育部重点实验室，南昌 330031; 2.中国环境科学研究院，国家环境保护地下水污染模拟与控制重点实验室，北京 100012; 3.陕西省环境调查评估中心，西安 710054 |
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| 基金项目： | 国家自然科学基金;国家科技重大专项 |
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| 摘 要： | 以新疆某石油炼化污染场地为研究对象，将场地土壤划分为4层，选取石油烃(C5~C7)为目标污染物，基于HERA (health and environmental risk assessment)软件开展土壤分层风险评估。结果表明：各土壤层的危害风险均超过可接受水平，修复目标值分别为161.20、182.58、316.75、450.24 mg·kg−1。根据风险评估结果，提出场地土壤气相抽提(soil vapor extraction，SVE)修复方案，抽提井数量为20口，抽提流量为0.36 m3·min−1，苯的去除量为56.71 kg·d−1，需要147 d将场地土壤中污染物的浓度降低到修复目标值以下。依据土壤层风险评估结果和土壤污染羽分布不同，优化了SVE抽提井井深和井筛深度设置，相对于寻常SVE修复设计，可降低修复成本，提高修复效率，预防过度修复，形成了一套基于HERA风险评估的SVE修复方案设计体系。
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| 关 键 词： | 石油炼化污染场地 土壤分层风险评估 石油烃 HERA SVE |
| 收稿时间： | 2019-01-14 |
Optimization of SVE remediation project based on soil layer risk assessment with HERA model |
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| SHI Junxiang, ZHENG Juan, YANG Yang, XI Beidou, LI Juan, TANG Jun, WANG Yang. Optimization of SVE remediation project based on soil layer risk assessment with HERA model[J]. Chinese Journal of Environmental Engineering, 2019, 13(12): 2954-2962. doi: 10.12030/j.cjee.201901098 |
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| Authors: | SHI Junxiang ZHENG Juan YANG Yang XI Beidou LI Juan TANG Jun WANG Yang |
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| Affiliation: | 1.Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, China; 2.State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 3.Shaanxi Environmental Investigation and Assessment Center, Xi′an 710054, China |
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| Abstract: | A petroleum refining contaminated site in Xinjiang and the petroleum hydrocarbons (C5~C7) were selected as the research object, and the soil of site was divided into four layers to assess their environmental risks with HERA (health and environmental risk assessment) model. The results showed that the hazard risk of each soil layer was unacceptable, and the remediation target values were 161.20, 182.58, 316.75 and 450.24 mg·kg−1, respectively. The SVE (soil vapor extraction) remediation scheme was proposed according to the risk assessment result. The number of extraction well was set as 20 and the extraction flow was 0.36 m3·min−1. The removal rate of benzene was 56.71 kg·d−1, and it would take 147 days to reach the remediation target values. The optimized SVE extraction well depth and well screen depth were designed based on the risk assessment results of soil layer and the different distribution of soil pollution plume. The optimized SVE remediation scheme can reduce the repair cost, improve the repair efficiency and prevent excessive repair compared with ordinary SVE design. A SVE remediation scheme optimization system was formed based on HERA risk assessment. |
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| Keywords: | petroleum refining contaminated site soil layer risk assessment petroleum hydrocarbons HERA SVE |
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