Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, China; Shandong Engineering Research Center for Environmental Protection and Remediation on Groundwater, Jinan, 250014, China.
Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, China.
Environ Res. 2024 Jun 1;250:118422. doi: 10.1016/j.envres.2024.118422. Epub 2024 Feb 19.
As important chemical raw materials and organic solvents, halogenated hydrocarbons not only play an important role in economic development, but are also the main source of environmental pollution. This study proposed an improved groundwater risk assessment model system, aimed at identifying and treating contaminants at leak sites. Groundwater ubiquity score (GUS) was used to evaluate the leachability of organic pollutants. The entropy-weighted water quality index (EWQI) method was used to assess the comprehensive quality of groundwater at the site. An improved groundwater health risk assessment model was constructed to analyze the health risks of groundwater. The sources of organic pollutants were identified based on the positive matrix factorization (PMF) model. Self-organizing mapping (SOM) and the K-means algorithm were integrated to classify and manage pollution source areas. The results showed that groundwater in the study area was strongly affected by human activities. The pollution source was located in a factory near S05. Different organic pollutants were highly leachable and had high potential to contaminate surrounding groundwater. 1,2-dichloropropane and 1,2,3-trichloropropane caused the largest range of contamination. The groundwater pollution index in the study area was high, and 72% of the monitoring points were non-drinkable. Both the carcinogenic and non-carcinogenic indexes of groundwater far exceeded the international standard limits and had a great impact on human health. 1,2,3-trichloropropane and 1,2-dichloropropane were major non-carcinogenic risk factors. The leakage of pollutants and pesticide solvents were the main causes of groundwater pollution. Cluster areas III and II were areas with significant pollution impacts and needed to be monitored intensively. Most areas were cluster I, with relatively low risk. This study can provide technical support for groundwater pollution risk assessment and management in similar industrial parks.
作为重要的化学原料和有机溶剂，卤代烃不仅在经济发展中发挥着重要作用，还是环境污染的主要来源。本研究提出了一种改进的地下水风险评估模型系统，旨在识别和处理泄漏点的污染物。利用地下水普遍得分（GUS）评估有机污染物的浸出性。采用熵权水质指数（EWQI）方法评价场地地下水的综合质量。构建了改进的地下水健康风险评估模型，分析地下水的健康风险。基于正定矩阵因子分解（PMF）模型识别有机污染物的来源。采用自组织映射（SOM）和 K-均值算法对污染源区域进行分类和管理。结果表明，研究区地下水受人类活动影响强烈。污染源位于 S05 附近的一家工厂。不同的有机污染物具有较强的浸出性，有较高的污染周边地下水的潜力。1,2-二氯丙烷和 1,2,3-三氯丙烷造成的污染范围最大。研究区地下水污染指数较高，72%的监测点不可饮用。地下水的致癌和非致癌指数均远远超过国际标准限值，对人体健康影响较大。1,2,3-三氯丙烷和 1,2-二氯丙烷是非致癌风险的主要因素。污染物和农药溶剂的泄漏是地下水污染的主要原因。III 类和 II 类聚类区是污染影响显著的区域，需要加强监测。大多数区域为 I 类聚类区，风险相对较低。本研究可为类似工业园区地下水污染风险评估和管理提供技术支持。
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