Occurrence of Elevated Nitrogenous and Phosphorus in Groundwater Sources Used in Unplanned Settlements, Dar Es Salaam - Tanzania

Pub Date : 2022-10-07 DOI:10.3126/ije.v11i2.46304
Leopord Sibomana Leonard, Rubhera Ram Mato, M. Kaseva
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Abstract

Groundwater in unplanned settlements is stressed by multiple pollution sources threatening health of consumers. Elevated nitrogen and phosphorus affect the quality of groundwater as they leach through the soil to groundwater. This study aimed at establishing variations of nitrogenous and phosphorus compounds in 75 boreholes used in 8 unplanned settlements in Dar es Salaam, Tanzania. Laboratory analysis using Spectrophotometer DR/4000 was conducted at Ardhi University. Principal Component Analysis was conducted by using Paleontological Statistics (PAST) software, version 3.08 and statistical significance set at p < 0.05. Results indicated that about 84% and 73.3% of sampled boreholes during wet and dry seasons, respectively had nitrate nitrogen greater than WHO recommendations for drinking water quality standards. Concentration of NO2-N showed that 12% and 14.7% of sampled boreholes during wet and dry seasons, respectively were greater than 0.9 mg/L TZS (574:2016) recommended guidelines. Phosphate concentration was greater than 2.2 mg/L TZS (574:2016) recommended guidelines in 49.3% and 12% of sampled boreholes during both wet and dry seasons, respectively. These results indicated that consuming such polluted water may be unsafe to infants and older people and therefore alternative drinking water source is recommended.
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坦桑尼亚达累斯萨拉姆,在未规划的定居点使用的地下水中氮和磷含量升高
无计划住区的地下水受到多种污染源的压力,威胁着消费者的健康。氮和磷的升高会影响地下水的质量,因为它们会通过土壤渗入地下水。这项研究旨在确定坦桑尼亚达累斯萨拉姆8个未规划住区使用的75个钻孔中氮和磷化合物的变化情况。在阿迪大学用DR/4000分光光度计进行实验室分析。采用Paleontological Statistics (PAST)软件进行主成分分析,软件版本为3.08,统计学显著性为p < 0.05。结果表明,在干湿季节,约84%和73.3%的采样钻孔的硝酸盐氮含量分别高于世界卫生组织建议的饮用水质量标准。在干湿季节,12%和14.7%的取样钻孔NO2-N浓度分别大于0.9 mg/L TZS(574:2016)推荐指南。在湿季和旱季,49.3%和12%的采样钻孔的磷酸盐浓度分别大于2.2 mg/L TZS(574:2016)推荐指南。这些结果表明,饮用这种受污染的水可能对婴儿和老年人不安全,因此建议使用其他饮用水源。
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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