共存无机离子对国产纳滤膜去除氟离子的影响  

Effect of Coexisting Inorganic Ions on Removal of Fluoride by Domestic Nanofiltration Membrane

作　　者：李淑涵 李世勇 武福平[1] 张国珍[1,2] 郑凯 LI Shuhan;LI Shiyong;WU Fuping;ZHANG Guozhen;ZHENG Kai(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Engineering Research Center for Comprehensive Utilization of Water Resource in Cold and Arid Regions of Ministry of Education,Lanzhou 730070,China;Shandong Rizhao Habor Group Ltd.Co.,Rizhao 276800,China)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]寒旱地区水资源综合利用教育部工程研究中心,甘肃兰州730070 [3]山东日照港集团有限公司,山东日照276800

出　　处：《环境科学与技术》2020年第8期7-12,共6页Environmental Science & Technology

基　　金：国家重点研发计划项目(2019YFD1100103);国家重点研发计划项目(2016YFC0400703);国家自然科学基金(51768031)。

摘　　要：该文通过分别研究国产纳滤膜NF1和VNF2对单组分溶液的截留率和膜通量以及双组分溶液的截留率,考察了国产纳滤膜对不同阴阳离子的截留顺序以及不同质量浓度的共存无机阴离子对纳滤除氟的影响。实验结果表明:通过对操作压力与纳滤膜通量之间的研究,证明操作压力是膜通量的主要推动力;单组分溶液中,膜NF1与VNF2对阳离子截留率的大小顺序为Mg^2+>Ca^2+>Na^+,对阴离子的截留顺序为F^->HCO3^->SO4^2->Cl^-,膜VNF2的截留率高于膜NF1,通量则低于膜NF1;在双组分溶液中,共存无机阴离子对F^-截留率的影响不同,主要影响顺序为SO4^2->HCO3^->Cl^-,而膜VNF2除氟时受到的影响小于膜NF1。By studying the rejection rate and membrane flux of single-component solutions and the rejection rate of twocomponent solutions of domestic nanofiltration membranes NF1 and VNF2 respectively,the effect of domestic nanofiltration membrane on the retention sequence of different ions and the co-existing inorganic anion with different mass concentrations on the removal of fluoride from nanofiltration was investigated.The results showed that the operating pressure was the main driving force of the membrane flux between the operating pressure and the nanofiltration membrane flux.In the single-component solution,the NF1 and VNF2 membranes had a cation rejection rate order of Mg^2+>Ca^2+>Na^+,and anion rejection order of F->HCO3^->SO4^2->Cl^-,while the retention rate of membrane VNF2 was higher than membrane NF1,and membrane flux was lower than NF1.In the two-component solution,different concentrations of co-existing inorganic anions had different effects on the F-rejection rate when the fluorine concentration remained constant,the main order of influence is SO4^2->HCO3^->Cl^-,and the membrane VNF2 is less affected by the fluorine removal than the membrane NF1.

关 键 词：环境工程学 国产纳滤膜 窖水 氟离子 离子浓度比 

分 类 号：TU991.2[建筑科学—市政工程]