Arsenic(V)removal from groundwater by GE-HL nanofiltration membrane:effects of arsenic concentration,pH,and co-existing ions  

作　　者：Xiaowei WANG Wenjun LIU Desheng LI Weifang MA 

机构地区：[1]School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China [2]Department of Environmental Science and Engineering,Tsinghua University,Beijing 100084,China [3]School of Civil Engineering and Architecture,Beijing Jiaotong University,Beijing 100044,China

出　　处：《Frontiers of Environmental Science & Engineering》2009年第4期428-433,共6页环境科学与工程前沿（英文）

基　　金：the Alcoa fund and Beijing Municipal Science and Technology Commission(Z0006345000091)。

摘　　要：A laboratory-scale investigation was performed to study arsenic(As(V))removal by negatively charged GE-HL nanofiltration(NF)membrane in simulated drinking water.Effects of As(V)concentration(0–200μg·L–1),pH,and co-ions and counter-ions were investigated.The NF membrane presented good stability,and the rejection rates exceeded 90%.The rejection rates of As(V)decreased with the increase of As(V)concentration,while it increased with the increase of pH(reached 96%at pH 6.75).Moreover,a negative relationship was observed between the co-existing ions of Cl^(–),Na^(+),SO_(4)^(2–),and Ca^(2+)and the removal of As(V),in which bivalent ions presented more significant effects than monovalent ions.

关 键 词：nanofiltration(NF) rejection rate co-existing ion co-ion COUNTER-ION 

分 类 号：P64[天文地球—地质矿产勘探]