农村含氟饮用水钙盐沉淀法处理的试验分析

Experimental Analysis of Calcium Salt Precipitation Treatment in Rural Fluorinated Drinking Water

文章以位于新疆沙雅县的哈德墩镇为背景,对中国农村含氟饮用水钙盐沉淀法处理过程及方法的可行性进行试验分析,在试验过程中,分别从pH值及静置反应时间等角度对氯化钙投放量占试验水体比50%、60%、70%及75%情况下的除氟净化效果进行比较,所得出的结果对于中国农村饮用水氟离子超标问题的解决和饮用水水质净化有普遍适用性。试验结果表明,对于中国农村含氟饮用水钙盐沉淀处理而言,氯化钙最佳投加量应控制在试验水体的75%,试验水体pH值应取8.5,静置反应时间应≥50min,能将农村含氟水体中15mg/L的高含氟量降至6mg/L,净化处理结果虽与国家饮用水标准仍存在较大差距,但是对于偏远农村地方性饮用水氟中毒有一定的缓解和减轻效果。

Taking Hadedun town in Shaya County of Xinjiang as the background,the feasibility of calcium salt precipitation treatment process and method for fluorinated drinking water in rural areas of China was analyzed in this paper.During the process of the test,from the point of view of pH value and standing reaction time respectively,the fluoride removal and purification effect of calcium chloride dosage in the test water ratio of 50%,60%,70% and 75% were compared,the results obtained for solving the problem of excessive fluoride ion in drinking water in rural China and drinking water quality purification has universal applicability.The test results show that for the calcium salt precipitation treatment of rural fluorinated drinking water in China,the optimal dosage of calcium chloride should be controlled in 75% of the test water,the pH value of the test water should be 8.5,the standing reaction time should not be less than 50 min,the rural fluorinated drinking water can reduce the high fluoride content of 15 mg/L to 6 mg/L,although the purification treatment results are in line with the national drinking water standard,there is still a big gap,but for remote rural endemic drinking water fluorosis has a certain alleviating effect.