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Removal of Cerium from aqueous solution via Polymer-enhanced ultrafiltration

Authors： PAN Ling, LU Xiaofeng*, CHEN Lifang, SHEN Liguo, QIN Qiang, LIU Zhongying，Wang Shuai

Units： Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

KeyWords： polyethyleneimine(PEI); complexation; ultrafiltration; radioactive wastewater; cerium

ClassificationCode：

year,volume(issue):pagination： 2014,34(6):67-71

Abstract：

Polyethyleneimine(PEI) was used to assist ultrafiltration to remove cerium from radioactive wastewater. The effects of pH, mass ratio of polymer to metal (P/M), ionic concentration, transmembrane pressure and processing time on retention of cerium and membrane permeate fluxeswere investigated. The results showthat when using PEI assist ultrafiltration,the optimum pH value and P/M value are 5 and 15, respectively; at the optimum conditions, the retentions of three different molecular weight cut-off (MWCO)membranesare 88.23% (5kDa), 87.01% (10kDa) and 89.78% (30kDa), respectively; in addition, the retention of cerium will decrease when Na+ and Ca2+ are exist in solution.The membranepermeate flux is linear increase with the increase of transmembrane pressure;Three kinds of membrane permeate flux have a tendency to decrease with the increase of operation time,and the rank of three membranespermeate flux decrease rate is: 30kDa ＞10kDa＞ 5kDa.

Funds：

上海市科技攻关项目（08231200300）

AuthorIntro：

潘玲（1988-），女，安徽滁州人，硕士研究生，研究方向为超滤技术在放射性废水中的应用，E-mail：panling@sinap.ac.cn.

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