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Assessment of drinking water quality characteristics and quality index of Rajshahi city, Bangladesh
Environment, Development and Sustainability ( IF 4.7 ) Pub Date : 2019-05-06 , DOI: 10.1007/s10668-019-00366-9
Md. Ferozur Rahaman , Md. Shamser Ali , Riad Arefin , Quamrul Hasan Mazumder , Ratan Kumar Majumder , Chowdhury Sarwar Jahan

The present study on chemistry, environmetrics and quality index of 116 groundwater samples collected in pre- and post-monsoon periods in the years of 2014 and 2015 from the drought-prone Rajshahi City Corporation area, Bangladesh, is carried out for its drinking suitability from management perspective. According to the Bangladesh Drinking Water Standards (2005), parameters like pH, Ca 2+ , Mg 2+ , Cl − , Fe (total) and Mn 2+ exceed the desirable limit, but within permissible limit without adverse effect except Mg 2+ concentration, which accounts for 45% in pre-monsoon period and makes groundwater unsafe for drinking purposes. The groundwater belongs to alkaline earth elements (Ca 2+ +Mg 2+ ) and exceed alkali elements (Na + +K + ), and weak acids (HCO 3 − ) exceed the strong acids (SO 4 2− ) where Ca 2+ and HCO 3 − are dominant ions, and attribute to temporary hardness of groundwater. The groundwater of the aquifer is of Ca 2+ –Mg 2+ –HCO 3 − type. The source of different ions is associated with partial ion exchanges, weathering of calcareous nodules and clay minerals, flow of groundwater system through aquifer lithology, municipal sewerage, anthropogenic influence, etc. The drinking water quality index also reveals that groundwater mostly falls in ‘good’ category having suitability for drinking purposes round the year. But increasing population and water demand in the area may create threat of quality hazard in near future, and regular groundwater quality monitoring should be carried out periodically for supplying safe drinking water to city dwellers.

中文翻译:

孟加拉国拉杰沙希市饮用水水质特征及质量指标评价

本研究对 2014 年和 2015 年从易旱的孟加拉国拉杰沙希市公司地区采集的 116 个季风前后的地下水样品的化学、环境计量学和质量指数进行了研究,研究了其饮用适宜性。管理视角。根据孟加拉国饮用水标准(2005 年),pH、Ca 2+ 、Mg 2+ 、Cl - 、Fe(总)和 Mn 2+ 等参数超过了理想的限度,但在允许的限度内,除了 Mg 2+浓度,占季风前期的 45%,使地下水不安全饮用。地下水属于碱土元素(Ca 2+ +Mg 2+ ),超过碱元素(Na + +K + ),弱酸(HCO 3 - )超过强酸(SO 4 2- ),其中Ca 2+和 HCO 3 - 是主要离子,并归因于地下水的暂时硬度。含水层地下水为Ca 2+ –Mg 2+ –HCO 3 - 型。不同离子的来源与部分离子交换、钙质结核和粘土矿物的风化、地下水系统通过含水层岩性的流动、市政污水、人为影响等有关。 ' 适合全年饮用的类别。但该地区不断增加的人口和用水需求可能会在不久的将来产生质量危害威胁,应定期进行地下水质量监测,为城市居民提供安全的饮用水。不同离子的来源与部分离子交换、钙质结核和粘土矿物的风化、地下水系统通过含水层岩性的流动、市政污水、人为影响等有关。 ' 适合全年饮用的类别。但该地区不断增加的人口和用水需求可能会在不久的将来产生质量危害威胁,应定期进行地下水质量监测,为城市居民提供安全的饮用水。不同离子的来源与部分离子交换、钙质结核和粘土矿物的风化、地下水系统通过含水层岩性的流动、市政污水、人为影响等有关。 ' 适合全年饮用的类别。但该地区不断增加的人口和用水需求可能会在不久的将来产生质量危害威胁,应定期进行地下水质量监测,为城市居民提供安全的饮用水。饮用水水质指数还显示,地下水大多属于全年适宜饮用的“良好”类别。但该地区不断增加的人口和用水需求可能会在不久的将来产生质量危害威胁,应定期进行地下水质量监测,为城市居民提供安全的饮用水。饮用水水质指数还显示,地下水大多属于“良好”类别,适合全年饮用。但该地区不断增加的人口和用水需求可能会在不久的将来产生质量危害威胁,应定期进行地下水质量监测,为城市居民提供安全的饮用水。
更新日期:2019-05-06
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