Arsenic Levels in the Environment and Foods Around Kisumu, Kenya

The Open Environmental Engineering Journal Pub Date : 2012-07-13 DOI:10.2174/1874829501205010119

A. Makokha, P. Kinyanjui, H. Magoha, Leonard R. Mghweno, Amina Nakajugo, John M. Wekesa

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引用次数: 5

Abstract

The objective of this study was to determine the level of arsenic in the environment and in foods consumed around Kisumu, and compare these levels with the recommended WHO maximum limits. Arsenic was determined in water samples from Lake Victoria, River Nyamasaria, tap water as well as in the soil samples. It was also determined in staple foods including maize, beans, fish and vegetables. Arsenic content in the samples was determined using Atomic Absorption Spectrophotometry. The results showed that arsenic content in the water and soil ranged from 0.00 to 8.30 ng/100 ml and 12.39 to 24.36 � g/100 g, respectively, and the mean arsenic levels in all water and soil samples were within the safe WHO limits for arsenic. The arsenic content in the maize and bean samples ranged from 5.21 to 7.03 � g/100 g. The arsenic content in the vegetables and fish ranged from 2.89 to 7.34 and 4.31 to 7.66 � g/100 g, respectively. The arse- nic content in all the food samples were also within the safe WHO arsenic limits. However, there were variations in arse- nic contents between the species of fish studied. The arsenic content was significantly higher in soil samples in compari- son to water samples (p<0.05). Overall the arsenic levels in all the food, water and soil samples were within the maximum WHO safe limits. It is recommended that continuous monitoring of arsenic levels of water, soil and foods be put in place since there could be seasonal variations in their levels.

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肯尼亚基苏木周围环境和食物中的砷含量

这项研究的目的是确定基苏木周围环境和食物中砷的含量，并将这些含量与世卫组织建议的最高限量进行比较。在维多利亚湖、尼亚马萨里亚河、自来水和土壤样本的水样中测定了砷。玉米、豆类、鱼类和蔬菜等主食中也含有这种物质。采用原子吸收分光光度法测定样品中的砷含量。结果表明，水和土壤中砷含量分别为0.00 ~ 8.30 ng/100 ml和12.39 ~ 24.36 ng/100 g，所有水和土壤样品的平均砷含量均在WHO砷安全限量范围内。玉米和豆类样品的砷含量为5.21 ~ 7.03 μ g/100 g。蔬菜和鱼类的砷含量分别为2.89 ~ 7.34 μ g/100 g和4.31 ~ 7.66 μ g/100 g。所有食物样本的砷含量均在世界卫生组织砷安全限量内。然而，所研究的鱼类种类之间的砷含量存在差异。土壤中砷含量显著高于水样(p<0.05)。总体而言，所有食物、水和土壤样本中的砷含量均在世卫组织安全上限之内。建议对水、土壤和食物的砷含量进行持续监测，因为它们的含量可能会有季节性变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Open Environmental Engineering Journal

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