School of Environment, Tsinghua University, Beijing, 100084, China.
School of Environment, Tsinghua University, Beijing, 100084, China.
J Environ Manage. 2021 Mar 1;281:111765. doi: 10.1016/j.jenvman.2020.111765. Epub 2020 Dec 30.
Numerous potential contaminated sites in China pose a substantial risk to human health and the local ecology. Thus, there is an urgent need to prioritize and further investigate potential contaminated sites and determine those that pose a threat in this regard. Newly developed by the Ministry of Ecology and Environment, the Risk Screening Method (RSM) scoring system is employed to assess soil and groundwater risk across China. In this study, the RSM is tested at a screening level and compared with the EPACMTP model, a solute transport model developed for the risk assessment of land disposal sites. First, a regional sensitivity analysis is conducted for EPACMTP model parameters, and those with significant sensitivity are compared with the risk indicators in the RSM. Second, 28 sites are evaluated by both prioritization methods in order to compare RSM risk scores and EPACMTP model simulations. Our results show that the RSM have similar risk assessing factors as EPACMTP model and its promising capability of prioritizing high-risk sites with very little available data. However, it does provide a conservative assessment, as risks at some sites are over-estimated, so further investigation is recommended for sites with high RSM risk scores. In addition, the initial screening should be documented by additional investigations at sites in order to prove the potential risk. The length of the period considered in the assessment has a great influence on prioritization results for heavy metals. As longer time scale will result in higher risk, its selection reflects the balance of current cost and future risk. The EPACMTP model provides a range of possible risks and can assess them within different timeframes. It is suggested to conduct further comparisons between the RSM and the solute transport models for sites from other areas, types of industries and more mobile compounds.
中国有许多潜在的污染场地，对人类健康和当地生态构成了重大威胁。因此，迫切需要优先考虑并进一步调查潜在的污染场地，并确定那些在这方面构成威胁的场地。生态环境部新开发的风险筛选方法（RSM）评分系统用于评估中国各地的土壤和地下水风险。本研究在筛选水平上测试了 RSM，并将其与为土地处置场地风险评估而开发的溶质运移模型 EPACMTP 进行了比较。首先，对 EPACMTP 模型参数进行区域敏感性分析，并将具有显著敏感性的参数与 RSM 中的风险指标进行比较。其次，用两种优先排序方法评估了 28 个场地，以比较 RSM 风险评分和 EPACMTP 模型模拟。结果表明，RSM 具有与 EPACMTP 模型相似的风险评估因素，并且具有在很少有可用数据的情况下优先考虑高风险场地的有前途的能力。然而，它确实提供了保守的评估，因为一些场地的风险被高估了，因此建议对 RSM 风险评分较高的场地进行进一步调查。此外，应通过对场地进行额外调查来记录初始筛选，以证明潜在风险。评估中考虑的时间段的长度对重金属的优先排序结果有很大影响。由于较长的时间尺度会导致更高的风险，因此其选择反映了当前成本和未来风险之间的平衡。EPACMTP 模型提供了一系列可能的风险，并可以在不同的时间范围内评估它们。建议对来自其他地区、不同类型工业和更易移动化合物的场地进行 RSM 与溶质运移模型之间的进一步比较。
