文章基本信息

标题：Speciation of arsenic in drinking water at Amansie West District
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作者：Joseph Apau ; Isaac Enyemadze
期刊名称：International Journal of Development and Sustainability
印刷版ISSN：2186-8662
出版年度：2014
卷号：3
期号：3
页码：431-440
出版社：International Society for Development and Sustainability (ISDS)
摘要：A study of arsenic speciation in drinking water at Amansie West District was conducted. Drinking water samples from boreholes, hand dug wells and streams were taken from 23 communities in the district. AmansieWest is a gold mining community with surface mining being the main method used. As (III) and As (V) in the water samples were separated using hydride generation and detection by flame AAS. Drinking water samples collected from boreholes, hand dug wells and streams in Amansie West District was analysed for pH, conductance, DO, Eh. The pH was in the range (6.57 -7.78 in boreholes, 6.10 -7.62 in wells, and 6.48 ¨C8.27 in streams) while conductance was obtained in the range of (74.5 -313.5 in boreholes, 82.0 ¨C210.7 in wells, and152.6 ¨C563.4 in streams) ¦ÌS/cm. The results obtained showed that the concentration of arsenic in streams, boreholes and hand dug wells fall between 0.24-37.22 ¦Ìg/L, 13.49-26.41 ¦Ìg/L, and 24.11-39.43 ¦Ìg/L respectively. 74% of surface and ground water samples had arsenic concentrations above 10 ¦Ìg/L. Correlation between arsenic concentration and some physical parameters (pH, DO, conductivity and redox potential) was done to ascertain any relationship. Speciation results showed that arsenic (III) is the dominant inorganic arsenic species. On average, 64% of all inorganic arsenic species is in the (+3) oxidation state, the rest is in the (+5) oxidation state. There was a strong negative correlation between arsenic speciation and the redox potential.
关键词：Arsenic; Borehole water; HG-AAS;Speciation; Stream water;Well water