Investigation, Pollution Mapping and Simulative Leakage Health Risk Assessment for Heavy Metals and Metalloids in Groundwater from a Typical Brownfield, Middle China

被引:50
作者
Li, Fei [1 ,2 ]
Qiu, Zhenzhen [1 ,2 ]
Zhang, Jingdong [1 ,2 ]
Liu, Wenchu [3 ]
Liu, Chaoyang [1 ,2 ]
Zeng, Guangming [3 ]
机构
[1] Zhongnan Univ Econ & Law, Res Ctr Environm & Hlth, Wuhan 430073, Hubei, Peoples R China
[2] Zhongnan Univ Econ & Law, Sch Informat & Safety Engn, Wuhan 430073, Hubei, Peoples R China
[3] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
brownfield groundwater quality; toxic metals; steady two-dimensional attenuation model; simulative leakage assessment; health risk mapping; XIANDAO DISTRICT; SOURCE IDENTIFICATION; SOURCE APPORTIONMENT; SPATIAL-DISTRIBUTION; TEMPORAL VARIATIONS; TRACE-ELEMENTS; CHANGSHA CITY; RIVER ESTUARY; TOXIC METALS; ROAD DUST;
D O I
10.3390/ijerph14070768
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Heavymetal andmetalloid (Cr, Pb, Cd, Zn, Cu, Ni, As and Hg) concentrations in groundwater from 19 typical sites throughout a typical brownfield were detected. Mean concentrations of toxic metals in groundwater decreased in the order of Cr > Zn > Cu > Cd > Ni > Pb > Hg > As. Concentration of Cr6+ in groundwater was detected to further study chromium contamination. Cr6+ and Cd in groundwater were recommended as the priority pollutants because they were generally 1399-fold and 12-foldgreater than permissible limits, respectively. Owing to the fact that a waterproof curtain (WPC) in the brownfield is about to pass the warranty period, a steady two-dimensional water quality model and health risk assessment were applied to simulate and evaluate adverse effects of Cr6+ and Cd on the water quality of Xiangjiang River and the drinking-water intake of Wangcheng Waterworks. The results indicated that when groundwater in the brownfield leaked with valid curtain prevention, the water quality in Xiangjiang River and drinking-water intake downstream were temporarily unaffected. However, if there was no curtain prevention, groundwater leakage would have adverse impact on water quality of Xiangjiang River. Under the requirements of Class III surface water quality, the pollution belt for Cr6+ was 7500 m and 200 m for Cd. The non-carcinogenic risk of toxic metals in Xiangjiang River exceeded the threshold in a limited area, but did not threaten Wangcheng Waterworks. By contrast, the carcinogenic risk area for adults was at a transverse distance of 200 m and a longitudinal distance of 18,000 m, which was close to the Wangcheng Waterworks (23,000 m). Therefore, it was essential to reconstruct the WPC in the brownfield for preventing pollution diffusion.
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页数:17
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