Drinking Water Quality of Kathmandu Valley
Drinking Water Quality of Kathmandu Valley
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加德满都谷地的饮用水质量
DOI：
10.3126/njst.v15i1.12027
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
P. Raut
中科院分区：
文献类型：
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作者：
Neel Kamal Koju;Tista Prasai;S. Shrestha;P. Raut
对加德满都谷地的饮用水水质进行了分析。2012年3月至2013年3月期间，从加德满都、Lalitpur和Bhaktapur地区的不同地点共收到969份水样（392份来自挖威尔斯，287份来自深钻，218份来自处理水，46份来自自来水，26份来自其他水源）。对这些样品进行分析，以确定物理（pH值、温度、电导率、浊度）、化学（硬度、氯化物、铁、砷、氨、硝酸盐）和微生物（总大肠菌群）参数。结果发现，温度和硝酸盐在WHO标准范围内，而pH值，电导率，浊度，氯化物，铁，砷，氨和大肠菌群超过WHO标准指南。地下水（井水和井水）pH、电导率、硬度、浊度、铁、砷、氯化物、氨和大肠菌群总数的超标率分别为5%、2%、0.8%、36%、51%、0.1%、2%、11%和86%。再生水和自来水样品的硬度均在标准范围内。与处理后的水相比，自来水中的pH、砷和氯化物均在标准范围内。不同来源的饮用水的常见问题参数是浊度、铁、氨和电导率。在36%的处理过的水样品中发现了大肠菌群，而80%的自来水样品被大肠菌群污染。DOI：http://dx.doi.org/10.3126/njst.v15i1.12027 Nepal Journal of Science and Technology Vol. 15，No.1（2014）115-120
This research was conducted to analyze drinking water quality of Kathmandu valley. Total 969 water samples (392 from dug wells, 287 from deep boring, 218 from treated water, 46 from tap and 26 from other water sources) received from different places of Kathmandu, Lalitpur and Bhaktapur districts during March 2012 to March 2013. These samples were analyzed for the determination of physical (pH, temperature, conductivity, turbidity), chemical (hardness, chloride, iron, arsenic, ammonia, nitrate) and microbiological (total Coliform) parameters. It was found that the temperature and nitrate were within the WHO standards while pH, conductivity, turbidity, chloride, iron, arsenic, ammonia, and Coliform bacteria exceeded the WHO standard guideline. In ground water ( well and Boring), pH, conductivity, hardness, turbidity, iron, arsenic, chloride, ammonia and total Coliform count crossed WHO standards as 5%, 2%, 0.8%, 36%, 51%, 0.1%, 2%, 11% and 86 % respectively. Hardness was within the standard in both reated and tap water samples. Compared to treated water, pH, arsenic and chloride were within the standard in tap water. The common problematic parameters of different sources of drinking were turbidity, iron, ammonia and conductivity. Coliform bacteria were found in 36% samples of treated water whereas 80% tap water samples were contaminated from Coliform bacteria. DOI: http://dx.doi.org/10.3126/njst.v15i1.12027 Nepal Journal of Science and Technology Vol. 15, No.1 (2014) 115-120