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The fast rise of the socioeconomic activities in the developing countries has adversely affected the water supply. The perception of the water crisis is firmly established in the mind of the common man. The water crisis may lead to fatal epidemics, scarcity of income, water pollution, and unwanted pecuniary and military activities. The governmental and non-governmental organizations are working over the world to arrest the issue. The solution lies in the availability of a safer and more systematic treatment of pure water. This paper describes the geochemical analyses and modeling of groundwater to estimate the unmonitored groundwater contamination of heavy metal pollutants that resulted from mining and smelting activities. The total mercury (Hg) in groundwater was detected using an atomic fluorescence spectrophotometer. The nitrogen and mercury were separated by a cation exchanger column. The enriched Hg fraction was analyzed for its methylmercury concentration. The ground water has higher concentrations of mercury in the extraction well, indicating that mining activities are the major sources of contamination. The most dominant contributor to the mercury contamination is the effluent discharge from the defunct zinc smelter. In addition, mining activities may have also contributed to the anthropogenic contamination of the water due to the opening and reclamation of tailings dams operational for over 30 years preceding the study. The maximum mercury concentration was found to be 1.5 microg/L, although several point measurements were in the range of 0.024-1.2 microg/L. The Hg mass balance resulted in a mean of 30 microg Hg/L which is about five times the U.S. Environmental Protection Agency level of 0.15 microg/L for the historical total Hg in drinking water. The results from the chemical speciation modeling show that all the Hg in the ground water originated from the pollution from mining activities, mostly from the effluent of the mining industry and pyroprocessing plant. The results show that remediation and reclamation activities of mining waste will play a vital role in the pollutant reduction. This study provides a scheme for remediation of mercury-contaminated mining waste. The results were in the range of 0.7-0.9 and the chemical speciation modeling showed a decrease of the metalloids (e.g., arsenic, antimony, and tellurium), an increase of dissolved organic carbon (DOC), and a decrease in the carbonate, sulfate, and phosphate in the ground water. d2c66b5586






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