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22 February 2024

Contamination of borehole water by selected toxic heavy metals

Langat et al. (2024)

Water contamination in the Kerio valley basin has been attributed mainly to the mining activities along the valley, which include Fluorspar mining and exploration of hydrocarbons. Accordingly, the water environment in the region has come under extreme stress as a result of extensive mining industries and growing urbanization. This study focused on the contamination of borehole water by selected toxic heavy metals of environmental and public health concern. Considerably large volumes of wastewater from domestic, mining industries and municipal waste resulting from industrialization and urbanization are discharged into natural water bodies such as rivers and dams in this area, which ultimately seep into ground water systems. Groundwater samples were taken from boreholes near exploratory wells and several indicators of water quality were examined in groundwater samples which revealed very high concentrations of total dissolved solids, high electrical conductivity and relatively alkaline water. Eight heavy metals were analyzed in groundwater samples using atomic absorption spectroscopy (AAS). The analytical results show ........

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