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Study on the molecular weight cutoff of ultrafiltration membrane:Comparison of two testing substances, dextran and protein

Authors： YAN Zhongsen1, QU Fangshu1, LIANG Heng1, 2, YU Huarong1, LI Kai1, YANG Kang1, LI Guibai1

Units： 1. State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China; 2. National Engineering Research Center of Urban Water Resources，Harbin 150090, China

KeyWords： Ultrafiltration membrane; Molecular weight cutoff; Dextran; Protein

ClassificationCode：

year,volume(issue):pagination： 2015,35(3):44-50

Abstract：

This study used dextran and proteins as standard substances to investigate flat membranes and hollow fiber membranes rejection performance for different solute. The result showed that the measured MWCO was markedly higher than that ultrafiltration membrane manufacturers provided when dextran was used as the standard substance. The estimated reason was that dextran might have a chain structure which would help it penetrate the membrane pores. While the measured MWCO was nearly approaching to that ultrafiltration membrane manufacturers provided when protein was used. After comparing the trends of MWCO which different membrane deals with adjacent molecular weight substances, it occurs to us that the pore size distribution of various membranes have apparent differences. The single MWCO adopted traditionally failed to response interception performance of ultrafiltration membranes comprehensively.

Funds：

国家“十二五”重大水专项(2012ZX07404-003)；中央高校基本科研业务费专项基金资助(NSRIF. 2014096).

AuthorIntro：

鄢忠森（1990年9月），男，福建永泰人，主要研究方向为超滤膜技术在饮用水安全保障中的应用，博士研究生，talent3712@126.com;

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