State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment (MEE), Nanjing, 210042, Jiangsu, China.
CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS); Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, 264003, Shandong, China.
Bull Environ Contam Toxicol. 2022 Oct;109(4):623-629. doi: 10.1007/s00128-021-03399-x. Epub 2022 Mar 16.
Risk-based soil remediation and management have become a global environmental issue. Here, a nickel (Ni)-contaminated site was selected to conduct the risk-based remediation strategy. The Health and Environment Risk Assessment Software was used to calculate the human health risk and the remedial target value (RTV) of Ni. Soil highly contaminated with Ni (424.30 mg kg) could cause an unacceptable carcinogenic risk (1.41 × 10), which needs further remediation. Hence, a soluble humic substance (HS) was used as the washing agent to remove Ni. After a single wash at pH 4 and 8, the Ni concentrations in soil were reduced to 278.05 and 288.27 mg kg, both below the RTV (300 mg kg). Furthermore, sequential extraction analysis revealed that the residual Ni was maintained stably in the soil after HS washing. These findings suggested that HS is a promising washing agent for Ni-contaminated soil remediation under the guidance of risk control.
基于风险的土壤修复和管理已成为全球性的环境问题。在这里，选择了一个镍（Ni）污染场地来进行基于风险的修复策略。使用健康和环境风险评估软件来计算人类健康风险和镍的修复目标值（RTV）。镍含量高（424.30mgkg）的土壤可能会导致不可接受的致癌风险（1.41×10），需要进一步修复。因此，使用可溶性腐殖质（HS）作为洗涤剂来去除 Ni。在 pH 值为 4 和 8 下进行单次洗涤后，土壤中的 Ni 浓度分别降低到 278.05 和 288.27mgkg，均低于 RTV（300mgkg）。此外，连续提取分析表明，HS 洗涤后，土壤中残留的 Ni 稳定保持。这些发现表明，在风险控制的指导下，HS 是一种有前途的用于修复镍污染土壤的洗涤剂。
