%0 Journal Article
%T Influence of Co-existing Chloride on Fluoride Removal from Drinking Water by Nanofiltration Membrane<br>共存氯离子对饮用水纳滤除氟的影响研究
%A MA Wei-fang
%A LIU Wen-jun
%A <br>马伟芳
%A 刘文君
%J 环境科学
%D 2009
%I 
%X The influence of co-existing chloride to defluoridation of groundwater using nanofiltration membrane and membrane fouling were studied. The results show that nanofiltration has retention effect to all co-existing anion. When influent fluoride concentration was less than 6 mg/L, the fluoride concentration in permeated water was less than 1.2 mg/L which could reach the drinking water standard in rural area. The fluoride retention rate decreases with the increase of influent fluoride concentration or co-existing chloride concentration. The decreasing percentage of fluoride retention rate is the same when Cl- concentration increased 1 mol or F- concentration increased 0.1 mol. The fluoride retention rate increased when influent chloride concentration exceeded 220 mg/L. But the variation had no significant change. Environmental scanning electron microscope (ESEM) and its energetic chart analysis apparatus, X-ray diffration(XRD) analysis showed that the main fouling component was CaCO3. The fouling membrane could be recovered flux using citric acid and ammonia cleaning method.
%K nanofiltration membrane
%K defluoridation
%K drinking water
%K co-existing chloride<br>纳滤
%K 除氟
%K 饮用水
%K 共存氯离子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=DA9F8405596BC54682265C2CFD9A11F0&yid=DE12191FBD62783C&vid=340AC2BF8E7AB4FD&iid=38B194292C032A66&sid=872F6C582A30BA57&eid=4198A31627C9B2A6&journal_id=0250-3301&journal_name=环境科学&referenced_num=3&reference_num=11