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EFFECT OF HYDROPHILICALLY MODIFIED NANOFILTRATION MEMBRANE ON REMOVAL OF SMALL MOLECULE DISSOLVED ORGANIC COMPOUNDS

Authors： LING Xiaojia2 CHEN Liang3 ZHU Jianzhong1 DING Ying4

Units： 1.Key Laboratory for Integrated Treatment & Resources Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210009, China; 2.Jiangsu Naiwch Corporation, Nanjing 210012, China; 3.Water Conservancy Project Management of Qinhuai River, Jiangsu Province, Nanjing 210012, China; 4. College of Environmental Science, Nanjing Xiaozhuang university, 211171

KeyWords： Nanofiltration membrane; hydrophilicity; small molecular weight dissolved organic matter; removal

ClassificationCode：X5

year,volume(issue):pagination： 2018,38(4):81-85

Abstract：

The modified membranes have been fabricated on the polyethersulfone sol as substrate and the uncalcined SBA-15 mesoporous molecular sieve precursors as addition via phase inversion and calcination at 120℃. The properties of the modified membranes were characterized by N2 adsorption-desorption and static contact angle. The effects of varying content of addition in modified nanofiltration membranes were investigated by using fulvic acid and protein as typical representative of small molecular weight dissolved organic matter. The results showed that the average pore size of modified membranes was reduced by an order of magnitude, reaching the nanofiltration level. Meanwhile, the hydrophilicity was enhanced. The modified nanofiltration membranes could remove fulvic acid effectively, with membrane loss rate reducing, from 42.78% to less than 3%. 0.2 wt% modified membrane exhibited the best performance according to the effect of stain resistance and removal rate. Further more, the removal efficiency of amino acids in different sizes by the best modified membrane varied greatly, with a minimum of 15.00% and the maximum of 79.67%.

Funds：

国家自然科学基金, 含氮污染物在城市给水系统中转化机制与控制原理（51438006）；江苏高校优秀学科建设工程资助项目（PAPD）；国家重大仪器设备开发专项经费，原子荧光重金属在线监测设备的开发与应用（2014YQ060773）；水利部“948”项目,水中痕量挥发性有机物检测系统(30155045912)

AuthorIntro：

作者简介：凌小佳（1991-），女，硕士研究生，主要研究方向为水处理材料；联系电话：15295527036；电子邮件：570404482@qq.com；地址：江苏省南京市雨花台区龙西路11号，210012 通讯作者：祝建中（1970-），男，河海大学教授，博士生导师；电子邮件：zhuhhai2010@hhu.cn

Reference：

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