肯尼亚孟加塔荣来县井水部分重金属含量评价

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引用次数: 1

摘要

这项研究是为了评估从十个选定的井场取样的地下水中重金属的水平。选定的重金属分析水平是:锌,铅,汞,锰,镉和铬在干湿季节的分析是由火焰原子吸收光谱。季节性变化被认为是地下环境污染的一个方面,在地下环境中,没有明显可观察到的环境退化,或者可以私下处理未知污染物,而不需要对任何基质进行充电。采用火焰原子吸收光谱法对水样进行分析,结果表明:锌低于可检出限- 0.73±0.01 (mg -1);铅0.21±0.01- 0.33±0.01 (mg -1),汞0.0010±0.0001 -0.0019±0.0001(mg -1);0.256±0.01 (mgl-1);锰0.03±0.01- 0.26±0.01 (mg -1)。在旱季和雨季,镉和铬的含量低于可检测限度。旱季的锌和锰含量分别高于世界卫生组织推荐的3.0mg -1和0.01mg -1。井水中重金属的存在令人关注,因为即使是低水平的重金属也会因其积累而对人体健康产生负面影响。为了保护Ongata Rongai镇的环境和人类健康,需要严格的管理和公众意识。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of Selected Heavy Metals Levels In Borehole Water In Ongata Rongai, Kajiado County, Kenya.
The study was carried out to assess the levels of heavy metals in ground water sampled from ten selected borehole sites in Ongata Rongai town, Kajiado County. The levels of selected heavy metals analyzed were: Zinc, Lead, Mercury, Manganese, Cadmium and Chromium in dry and wet seasons the analysis was done by Flame Atomic Absorption Spectroscopy. Seasonal variation was considered as an aspect of pollution to the subsurface environment where there was no obvious observable environmental degradation or where unknown contaminants could have been disposed of, privately, without any matrix being charged. The analysis of water samples was done using Flame Atomic Absorption Spectroscopy and the results for the metal levels were in the range of: Zinc Below Detectable Limits- 0.73±0.01 (mgl-1 ); lead 0.21±0.01- 0.33±0.01 (mgl-1 ), mercury 0.0010 ± 0.0001 - 0.0019±0.0001(mgl-1 ); 0.256±0.01 (mgl-1 ); manganese 0.03±0.01- 0.26±0.01 (mgl-1 ). Cadmium and chromium had levels below detectable limits in dry and wet seasons. The levels of zinc and manganese were higher in the dry season than those recommended by World Health Organization of 3.0mgl-1 and 0.01mgl-1 respectively. The presence of the heavy metals in the borehole water is of concern since they could impact negatively on human health even at low levels due their accumulation. Stringent management and public awareness are required in order to safeguard the environment and human health in Ongata Rongai town.
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