电絮凝-微滤去除饮用水中的氟  

Defluoridation of drinking water using electrocoagulation-microfiltration

作　　者：李静波[1] 赵璇[2] 李福志[2] 

机构地区：[1]北京林业大学资源与环境学院,北京100083 [2]清华大学核能与新能源技术研究院,北京100084

出　　处：《清华大学学报（自然科学版）》2007年第9期1495-1497,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50508018)

摘　　要：饮用水中的氟离子对人体具有重要意义。该文采用电絮凝-微滤组合工艺技术,去除饮用水中超量的氟离子,并探讨电流密度、极板间距、pH值对除氟效果的影响。实验表明:电絮凝-微滤组合技术除氟效果明显;水中氟离子浓度的对数值与反应时间呈线性关系。所研究的电絮凝反应器的最佳工作参数为:电流密度σ=15.8 A/m2,极板间距d=1.0 cm,pH值在5.7～7.0范围内。水中SO42-和PO43-离子的存在会影响除氟效率,而阳离子Fe3+、Mg2+、Ca2+在一定程度上促进除氟反应的进行。The fluoride of drinking water is very important for human health. In this paper electrocoagulation-microfiltration （EC-MF） was used to purify groundwater contaminated by excessive fluoride. The tests analyzed the effects of current density, pH, and co-existing ions on the fluoride removal efficiency. The results demonstrate that the EC-MF process effectively removes the fluoride with the fluoride concentration decreasing to the linear relationship with the reaction time. The optimized defluoridation can be obtained in a pH range of 5.0-7, 6, current density of 15. 8 A/m^2, and electrode distance of 1 cm. The co existing anions of SO4^2- and PO4^3- show the negative influence on the fluoride removal, while Fe^3＋, Mg^2＋, and Ca^2＋ accelerate the removal.

关 键 词：电絮凝 饮用水 除氟 

分 类 号：X523[环境科学与工程—环境工程]