纳米分子筛处理低浓度含氟地下水的试验研究

Experimental Study on Defluoridation of Low Concentration Groundwater Using Nano-Molecular Sieve

研究了纳米分子筛在不同条件下对低浓度含氟地下水的处理效果.以天津市某地区含氟浓度为4.22,mg/L的地下水为原水,分析了不同pH值、不同分子筛用量和不同搅拌时间等因素对吸附效果的影响.试验结果表明:在试验选定的范围内,控制适当的pH值,加大除氟剂投加量,适当延长搅拌时间等均能提高纳米分子筛的吸附容量.在最佳条件下,此种纳米分子筛的吸附容量可达2.2,g/kg.

The applicability of nano-molecular sieve as adsorbent in removal of excess fluoride from low concentration groundwarter was studied. The effect ofpH value, dose and contact time on adsorption were measured according to a certain groundwater in Tianjin where the concentration of fluoride is 4.22 mg/L. Result showed that for the chosen water, the adsorption capacity of nano-molecular sieve can be improved by pH value control, dose increasement and contact time expand. This adsorption capacity can reach 2.2 g/kg in optimum conditions.