Trace elements in groundwater near an abandoned mine tailings dam and health risk assessment (NE Zimbabwe)

IF 1 4区 环境科学与生态学 Q4 WATER RESOURCES
Artwell Kanda, France Ncube, Peter Makumbe
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引用次数: 2

Abstract

Groundwater from shallow hand-dug wells at an abandoned gold mine tailings dam was characterised for selected physicochemical parameters during dry and wet seasons of 2018 and 2019. Health risk exposure of the local population (adults and children) through ingestion and dermal exposure was assessed. Groundwater quality parameters were lower than international drinking water quality guidelines (p < 0.05). The parameters were significantly influenced by season of the year (As, Cl−, SO42−), nature (As, Cd, Cl−, Fe, NO3−, SO42−), depth (Cd, Cl−, Fe, Ni, SO42−) and direction of the well (Cu, Cl−, Fe, NO3−, Pb, SO42−) (p < 0.05) relative to the tailings dam. Groundwater did not pose non-carcinogenic risk due to studied trace elements. However, arsenic had the potential to cause medium to high cancer risk to the local population. We propose re-vegetation of the tailings dam, diversion of surface tailings drainage to a containment pond and the provision of continuous piped water supplies.
废弃矿山尾矿坝附近地下水中的微量元素与健康风险评估(津巴布韦东北部)
在2018年和2019年干湿季节,对某废弃金矿尾矿坝浅层手挖井的地下水进行了选定的理化参数表征。评估了当地人口(成人和儿童)通过摄入和皮肤接触的健康风险暴露。地下水水质指标低于国际饮用水水质标准(p < 0.05)。相对于尾矿坝,季节(As、Cl−、SO42−)、性质(As、Cd、Cl−、Fe、NO3−、SO42−)、深度(Cd、Cl−、Fe、Ni、SO42−)和井向(Cu、Cl−、Fe、NO3−、Pb、SO42−)对参数有显著影响(p < 0.05)。由于所研究的微量元素,地下水不存在非致癌风险。然而,砷有可能对当地人口造成中等至高度的癌症风险。我们建议恢复尾矿坝的植被,将地表尾矿排入围护池,并提供连续的管道供水。
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来源期刊
Water SA
Water SA 环境科学-水资源
CiteScore
2.80
自引率
6.70%
发文量
46
审稿时长
18-36 weeks
期刊介绍: WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).
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