Determination of the Concentrations of Heavy Metals in Borehole Water near Refuse Dump Sites around the University of Cross River State (UNICROSS) Calabar, Nigeria

Chemical Science International Journal Pub Date : 2023-08-12 DOI:10.9734/csji/2023/v32i5857

N. O. Sam-Uket, Ayim, Elvis Monfung, Ameh Samuel Monday, Isah Muhammed Haruna

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Abstract

The contamination of groundwater from the infiltration of leachates into aquifers and health risks on residents drinking from boreholes around dumpsites informed this study on the levels of heavy metals in the boreholes around the University of Cross River State (UNICROSS) dumpsite. Borehole water samples were aseptically collected from 3 boreholes at 50, 80, and 200 meters respectively from the dumpsite into a one-liter sampling bottle and preserved in an ice chest. The samples were then analyzed for heavy metals using Atomic Absorption Spectrophotometer. The values obtained were compared with WHO permissible standards for drinking water. The mean concentrations of Pb (0.614 ± 0.008), Cd (0.399 ± 0.053), As (0.023 ± 0.002), and Co (0.002 ± 0.001 mg/l) in the borehole water were significantly higher than WHO permissible limits, while the concentrations of Cr (0.002 ± 0.001) and Ni (0.056 ± 0.004) were significantly lower than the WHO permissible limits. The increasing trend of heavy metals in the borehole water was Cr = Co < As < Ni < Cd

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尼日利亚卡拉巴尔克罗斯河州立大学(UNICROSS)附近垃圾场附近钻孔水中重金属浓度的测定

渗滤液渗入含水层对地下水的污染以及从垃圾场周围钻孔饮水的居民的健康风险为本研究提供了关于克罗斯河州立大学(UNICROSS)垃圾场周围钻孔重金属水平的信息。分别在距垃圾场50米、80米和200米的3个钻孔中无菌采集钻孔水样，装入1升取样瓶，保存在冰柜中。然后用原子吸收分光光度计对样品进行重金属分析。将所得值与世卫组织饮用水允许标准进行比较。井水中Pb(0.614±0.008)、Cd(0.399±0.053)、As(0.023±0.002)、Co(0.002±0.001 mg/l)的平均浓度均显著高于WHO允许限值，Cr(0.002±0.001)、Ni(0.056±0.004)的平均浓度均显著低于WHO允许限值。井水重金属含量的增加趋势为Cr = Co < As < Ni < Cd

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Chemical Science International Journal

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