Hossain Md Swadhin, Din Imran Ud, Rahman Ashfaqur, Islam Mongurul, Ali Wajid
Department of Environmental Science and Disaster Management, Daffodil International University (DIU), Dhaka 1216, Bangladesh.
National Centre of Excellence in Geology, University of Peshawar, Peshawar 25130, Pakistan.
Mar Pollut Bull. 2025 Jul;216:117954. doi: 10.1016/j.marpolbul.2025.117954. Epub 2025 Apr 13.
Groundwater contamination is a significant threat to water security in Bangladesh, especially in coastal areas influenced by salinity intrusion and geogenic pollutants. The study has collected 48 groundwater samples and analyzed 16 water quality parameters to assess the suitability of groundwater for drinking and irrigation purposes in a highly vulnerable coastal area of Bangladesh. The Canadian Council of Ministers of the Environment Water Quality Index (CCME WQI), Metal Index (MI), and Heavy Metal Pollution Index (HPI) were used to assess drinking water quality. In contrast, irrigation water suitability was evaluated using indices like Sodium Absorption Ratio (SAR), Sodium Percentage (Na%), Magnesium Absorption Ratio (MAR), and Kelly Ratio (KR). The results show that 72.92 % of the samples were above WHO drinking water guidelines for EC, which indicated high salinity risks. The CCME WQI classified 25 % of the samples as marginal or poor, and MI and HPI both showed significant contamination, mainly due to high Fe and As concentrations. The MAR indicated that 25 % of the samples were unsuitable for irrigation, mainly because of high salinity and sodium. Spatial analysis proved that severe deterioration of groundwater quality has been taking place in the southern area of Pirojpur severely, which requires urgent intervention, and continuous monitoring for safeguarding water resources in this vulnerable area.
地下水污染对孟加拉国的水安全构成重大威胁，尤其是在受海水入侵和地质源污染物影响的沿海地区。该研究收集了48个地下水样本，并分析了16个水质参数，以评估孟加拉国一个高度脆弱沿海地区的地下水用于饮用和灌溉的适宜性。采用加拿大环境部长理事会水质指数（CCME WQI）、金属指数（MI）和重金属污染指数（HPI）来评估饮用水质量。相比之下，灌溉水适宜性则使用钠吸附比（SAR）、钠百分比（Na%）、镁吸附比（MAR）和凯利比率（KR）等指数进行评估。结果表明，72.92%的样本超过了世界卫生组织关于电导率的饮用水准则，这表明存在高盐度风险。CCME WQI将25%的样本归类为边缘或较差，MI和HPI均显示出严重污染，主要原因是铁和砷的浓度较高。MAR表明25%的样本不适用于灌溉，主要是因为盐度和钠含量较高。空间分析证明，皮罗杰布尔南部地区的地下水质量已严重恶化，这需要紧急干预，并持续监测以保护这个脆弱地区的水资源。
