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首页> 外文期刊>Journal of Medical Sciences >Toxic Chemicals and Microbes in Some Nigerian Water Samples
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Toxic Chemicals and Microbes in Some Nigerian Water Samples

机译：尼日利亚一些水样中的有毒化学品和微生物

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Some conventional and non-conventional sources of drinking water in Nigeria were screened for Fe, Zn, Cu, Mn, cyanide, nitrate, nitrite, nitrosamines, total coliform, E. coli and fecal streptococci, using standard analytical methods. Results obtained showed that water samples from overhead tanks and those from rivers in industrialized areas had iron levels far in excess of WHO permissible concentrations; while in all samples, Cu, Mn and Zn were within safe limits. There was a wide range (42.2 to 179.8) in % coefficient of variation, CV of the minerals between samples, suggesting that sample source influenced mineral levels. The range of values for nitrate, nitrite and nitrosamines were 83±32 to 21,720±590, 14.5±5.0 to 52.0±14.0 and 0.10±0.01 to 0.56±0.03 g L-1, respectively. Surface and overhead tanks had nitrate levels twice the US EPA recommended maximum contaminant limits. The %CV values for nitrate, nitrite and nitrosamines were 157.0, 49.5 and 13.0%, respectively, implying locational variability in these parameters. Cyanide was not detected in any of the samples. Fecal contamination of all samples was indicated by presence of fecal coliform (range 3 to 1,100 cells/100 mL) and fecal streptococci (range 3 to 240 cells/100 mL). The public health significance of these results underscore the need for adequate disposal of human and industrial wastes and the importance of regular monitoring of all drinking water sources.
机译：使用标准分析方法，对尼日利亚的一些常规和非常规饮用水源进行了铁，锌，铜，锰，氰化物，硝酸盐，亚硝酸盐，亚硝胺，大肠菌群，大肠杆菌和粪便链球菌的筛查。获得的结果表明，工业化地区的高架储罐和河流中的水样中的铁含量远远超过了WHO允许的浓度。而所有样品中的铜，锰和锌均在安全范围内。样品之间矿物质的变异系数％（CV）的范围很宽（42.2至179.8），这表明样品来源会影响矿物质的含量。硝酸盐，亚硝酸盐和亚硝胺的值范围分别为83±32至21,720±590、14.5±5.0至52.0±14.0和0.10±0.01至0.56±0.03 g L -1 。地面和顶部储罐的硝酸盐含量是美国EPA建议的最大污染物限值的两倍。硝酸盐，亚硝酸盐和亚硝胺的％CV值分别为157.0、49.5和13.0％，这意味着这些参数中的位置存在差异。在任何样品中均未检测到氰化物。粪便中的大肠菌群（范围为3至1,100个细胞/ 100 mL）和粪便链球菌（范围为3至240个细胞/ 100 mL）表明存在粪便污染。这些结果对公共卫生的重要性强调了对人类和工业废物的充分处理的必要性，以及对所有饮用水源进行定期监测的重要性。

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