化学工程
材料科学
海水淡化
正渗透
超滤(肾)
涂层
膜污染
纳滤
接触角
水处理
作者
Mahboobeh Vaselbehagh,Hamed Karkhanechi,Sri Mulyati,Ryosuke Takagi,Hideto Matsuyama
出处
期刊:Desalination
[Elsevier]
日期:2014-01-02
卷期号:332 (1): 126-133
被引量:90
标识
DOI:10.1016/j.desal.2013.10.031
摘要
Abstract The fouling, in particular the organic fouling of anion exchange membranes (AEMs), is a serious problem in electrodialysis (ED). In this paper, we attempted to improve the antifouling potential of AEM by surface modification with polydopamine (PDA). The antifouling potential was evaluated by the transition time, i.e. the time elapsed before fouling took place, using sodium dodecyl benzene sulfonate (SDBS) as a model foulant. The negative surface charge density, hydrophilicity and roughness of the membrane surface were increased with increasing dopamine concentration in the modification solution. The increases in negative surface charge density and hydrophilicity increased the antifouling potential, while the increase in surface roughness decreased the antifouling potential. Consequently, the optimum modification condition was the immersion into a 0.1 kg/m3 dopamine aqueous solution at pH 8.8 for 24 h. Under this condition, the antifouling potential of AEM was sufficiently improved. It was shown by theoretical analysis of the fouling data that the surface modification with PDA prevented the adsorption of SDBS micelles and improved the antifouling potential. Furthermore, it was experimentally confirmed that the modified membrane was highly stable.
科研通智能强力驱动
Strongly Powered by AbleSci AI