Influence of pore size and membrane surface properties on arsenic removal by nanofiltration membranes  

作　　者：Nathalie Tanne Rui Xu Mingyue Zhou Pan Zhang Xiaomao Wang Xianghua Wen 

机构地区：[1]State Key Joint Laboratory of Environmental Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Environmental Science & Engineering》2019年第2期55-62,共8页环境科学与工程前沿（英文）

摘　　要：Nanofiltration(NF)has a great potential in removing arsenate from contaminated water.The performance including arsenate rejection,water permeability and resistance to fouling could however differ substantially among NF membranes.This study was conducted to investigate the influence of membrane pore size and surface properties on these aspects of membrane performance.Four fullyaromatic NF membranes with different physicochemical properties were adopted for this study.The results showed that surface charge,hydrophobicity,roughness and pore size could affect water permeability and/or arsenate rejection considerably.A more negative surface charge was desirable to enhance arsenate rejection rates.NF90 and a non-commercialized membrane(M#1)demonstrated the best performance in terms of arsenate rejection and water permeability.The M#1 membrane showed less membrane fouling than NF90 when used for filtration of real arsenic-containing groundwater.This was mainly due to its distinct chemical composition and surface properties.A severe membrane fouling could lead to a substantial reduction of arsenic rejection.The M#1 membrane showed the best performance,which indicated that membrane modification could indeed enhance the overall membrane performance for water treatment.

关 键 词：ARSENATE NANOFILTRATION DRINKING water MEMBRANE PROPERTY MEMBRANE FOULING 

分 类 号：T[一般工业技术]