地下水质量和重金属健康风险评估:来自加纳Tarkwa矿区的研究

J. Seidu, A. Ewusi
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引用次数: 4

摘要

本研究旨在利用Piper和Chadha地块评价Tarkwa矿区水的水文地球化学特征,并利用美国环境保护署(USEPA)健康风险评估模型进行健康风险评估。本次研究共使用了39个地下水样点。Piper图和Chadha图结果表明,研究区主要水类型为Ca-HCO3和Ca-Mg-Cl混合水类型,表明该区地下水可归类为淡水。重金属的危害商(HQ)值的估计,表明一个可接受的水平的非致癌的人体健康风险。相对于HQ值,计算出的危害指数(HQ)小于1,表明居民不会因注射重金属而面临潜在的健康风险。As的致癌风险估计(1.80×10-4)高于可接受风险。由此估计的致癌风险表明,长期饮用地下水会增加患癌症的几率。可以得出结论,目前塔克瓦地区的地下水可供家庭使用是安全的。关键词:水化学特征;人类风险评价;塔克瓦矿区
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of Groundwater Quality and Health Risk of Heavy Metals: A study from the Tarkwa Mining Area, Ghana
This study seeks to evaluate the hydrogeochemical characteristics of water in the Tarkwa mining area using the Piper and Chadha plots and to carry out a health risk assessment using the US Environmental Protection Agency (USEPA) health risk assessment model. A total of 39 groundwater sample points were used for this study. Results from the Piper and Chadha diagrams show that the dominant water types in the study area are Ca-HCO3 and Mixed Ca-Mg-Cl water types which indicates that groundwater in the area can be classified as fresh water. The hazard quotient (HQ) value for heavy metals estimated, suggested an acceptable level of noncarcinogenic inimical health risk. In relation to the HQ value, the Hazard Index (HQ) calculated was less than 1 suggesting that inhabitants will not be exposed to a potential health risk for the injection of heavy metals. Carcinogenic risk estimated for As (1.80×10-4) was higher than the acceptable risk. The carcinogenic risk estimated therefore indicated that, drinking of groundwater over a long period will increase the probability of cancer. It can be concluded that currently the groundwater in the Tarkwa area is safe for domestic purposes.   Keywords: Hydrochemical Characteristics, Human Risk Assessment, Tarkwa Mining Area
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