固废堆场地下水环境风险评估与污染运移模拟研究  

Groundwater environmental risk assessment and pollution transport simulation of solid waste site

作　　者：尹广田[1] 王健男 郑爱荣[2,3,4,5] YIN Guang-tian;WANG Jian-nan;ZHENG Ai-rong(CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China;CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China;Key Laboratory of Geotechnical Engineering of Ministry of Communications,Tianjin 300222,China;Key Laboratory of Geotechnical Engineering of Tianjin,Tianjin 300222,China;CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China)

机构地区：[1]中交第一航务工程勘察设计院有限公司,天津300222 [2]中交天津港湾工程研究院有限公司,天津300222 [3]港口岩土工程技术交通行业重点实验室,天津300222 [4]天津市港口岩土工程技术重点实验室,天津300222 [5]中交第一航务工程局有限公司,天津300461

出　　处：《中国港湾建设》2022年第6期82-86,共5页China Harbour Engineering

摘　　要：以天津市某固废堆场为例,开展了地下水环境调查,基于人体健康和环境生态风险2个维度进行了环境风险评估,并开展了氨氮污染物运移模拟分析工作。结果显示地下水中镍和苯胺最大浓度分别为102μg/L和29.6μg/L,相比GB/T 14848-2017《地下水环境质量标准》IV类水指标,分别超标1.02倍和2.28倍。此外,地下水中氨氮、氯化物、硬度、溶解性总固体和大肠杆菌也超过IV类水指标。人体健康风险评估结果为可接受,但生态风险评估结果表明对周围水环境存在较高生态风险。溶质运移模拟结果显示,氨氮污染羽在未来一段时间内会持续向东南方向扩散,造成较大面积的地下水污染,20 a后污染羽最大迁移距离可达264 m。建议开展修复治理,加强环境风险管控。Taking a solid waste site in Tianjin as an example,the groundwater environment investigation was carried out,and the environmental risk assessment was carried out based on two dimensions of human health and environmental ecological risk,and the simulation analysis of ammonia nitrogen pollution transport was carried out.The results show that the maximum concentrations of nickel and aniline in the groundwater are 102μg/L and 29.6μg/L,respectively,which are 1.02 times and 2.28 times higher than the class IV water indexes in GB/T 14848—2017,Environmental Quality Standard for Groundwater.In addition,ammonia nitrogen,chloride,hardness,total dissolved solids and escherichia coli in groundwater also exceeded the class IV water index.The results of human health risk assessment are acceptable,but the results of ecological risk assessment show that there is a high ecological risk to the surrounding water environment.The simulation results of solute transport show that ammonia nitrogen pollution plume will continue to spread southeast in the future,resulting in a large area of groundwater pollution.After 20 years,the maximum migration distance of pollution plume can reach 264 m.It is suggested to carry out remediation and governance and strengthen environmental risk management and control.

关 键 词：固废堆场 地下水 环境风险评估 污染运移 

分 类 号：X508[环境科学与工程—环境工程] U698.7[交通运输工程—港口、海岸及近海工程]