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Title: Health risk assessment of heavy metals and metalloid in drinking water from communities near gold mines in Tarkwa, Ghana
Authors: Bortey-Sam, Nesta
Nakayama, Shouta M. M.
Ikenaka, Yoshinori
Akoto, Osei
Baidoo, Elvis
Mizukawa, Hazuki
Ishizuka, Mayumi
Keywords: Heavy metal
Health risk
Hazard index
Issue Date: May-2015
Publisher: Environ Monit Asses
Citation: Environ Monit Asses, (2015) 187:397
Abstract: Concentrations of heavy metals and metalloid in borehole drinking water from 18 communities in Tarkwa, Ghana, were measured to assess the health risk associated with its consumption. Mean concentrations of heavy metals (μg/L) exceeded recommended values in some communities. If we take into consideration the additive effect of heavy metals and metalloid, then oral hazard index (HI) results raise concerns about the noncarcinogenic adverse health effects of drinking groundwater in Huniso. According to the US Environmental Protection Agency’s (USEPA) guidelines, HI values indicating noncarcinogenic health risk for adults and children in Huniso were 0.781 (low risk) and 1.08 (medium risk), respectively. The cancer risk due to cadmium (Cd) exposure in adults and children in the sampled communities was very low. However, the average risk values of arsenic (As) for adults and children through drinking borehole water in the communities indicated medium cancer risk, but high cancer risk in some communities such as Samahu and Mile 7. Based on the USEPA assessment, the average cancer risk values of As for adults (3.65E−05) and children (5.08E−05) indicated three (adults) and five (children) cases of neoplasm in a hundred thousand inhabitants. The results of this study showed that residents in Tarkwa who use and drink water from boreholes could be at serious risk from exposure to these heavy metals and metalloid.
Description: This article is published in Environ Monit Assess and also available at DOI 10.1007/s10661-015-4630-3
URI: 10.1007/s10661-015-4630-3
Appears in Collections:College of Science

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