Environmental Science Discipline, Khulna University, Khulna, Bangladesh.
Forestry and Wood Technology Discipline, Khulna University, Khulna, Bangladesh.
Environ Monit Assess. 2020 Feb 5;192(3):163. doi: 10.1007/s10661-020-8128-2.
Consumption of drinking water with high nitrate may pose a serious health hazard. This study examined nitrate concentration in the water of dug wells at the Jashore district of Bangladesh. A total of 58 water samples were collected from dug wells which are currently in use for drinking water. Concentrations of nitrate in the water range from 0.05 to 430 mg/l and from 0.24 to 206 mg/l respectively in the wet and dry seasons. About 17% and 14% of the samples during the wet and dry seasons respectively showed nitrate concentration above the WHO guideline value of 50 mg/l. The wells with high nitrate concentration showed health risks for adults and children. About 17% of the samples showed a health hazard index (HQ) values above the acceptable limit (HQ values > 1) for adults, in both the wet and dry seasons, whereas 26% and 33% of the water samples in the wet and dry seasons respectively showed HQ values > 1 for children. Therefore, children are more likely to be affected by intaking nitrate-contaminated dug well water. Health risks of elevated nitrate concentration in the dug wells require proper attention to ensure reliable water supply.
饮用水中硝酸盐含量过高可能会对健康造成严重危害。本研究检测了孟加拉国杰索尔地区的地下水井中的硝酸盐浓度。从目前用于饮用水的地下水井中采集了 58 个水样。雨季和旱季水中硝酸盐浓度分别在 0.05 至 430 毫克/升和 0.24 至 206 毫克/升之间。雨季和旱季分别有 17%和 14%的样本硝酸盐浓度超过世界卫生组织规定的 50 毫克/升的指导值。高硝酸盐浓度的水井对成人和儿童的健康构成威胁。雨季和旱季分别有 17%和 26%的样本对成人的健康危害指数（HQ）值超过可接受限值（HQ 值>1），而雨季和旱季分别有 33%和 33%的水样对儿童的 HQ 值超过 1。因此，儿童更容易受到摄入受硝酸盐污染的地下水的影响。需要对地下水井中硝酸盐浓度升高的健康风险给予适当关注，以确保可靠的供水。
