Evaluation of humic acid removal by a flat submerged membrane photoreactor

作     者：WEI Yong CHU HuaQiang DONG BingZhi LI Xuan 

作者机构：School of Environmental Science and Engineering State Key Laboratory of PoUution Control and Resource Reuse Tongji University Shanghai200092 China School of Environmental and Safety Engineering Changzhou University Changzhou 213164 China 

出 版 物：《Chinese Science Bulletin》 (Chin. Sci. Bull.)

年 卷 期：2011年第56卷第32期

页      面：3437-3444页

核心收录：

学科分类：083001[工学-环境科学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Water Pollution Control and Treatment Key Technologies R&D Program (2008ZX07421-006 and 2009ZX 07424-006) 

主　　题：光催化反应器 腐殖酸类 跨膜 评价 浸没式 膜污染控制 光催化氧化 UV254 

摘      要：A flat submerged membrane combined with a TiO 2 /UV photocatalytic reactor (FSMPR) was employed in batch mode to remove humic acid (HA). HA removal efficiency was characterized by UV 254 absorbance, UV-vis spectra, dissolved organic carbon (DOC) concentration, specific UV absorbance (SUVA), and trihalomethane formation potential (THMFP). The FSMPR process was effective in removing more than 86% of DOC and nearly 100% of UV 254 absorbance, while the THMFPs of samples were reduced to 19 μ g/L after 150 min of treatment. In addition, changes in transmembrane pressure (TMP) with and without UV were evaluated; TiO 2 /UV was effective at controlling membrane fouling by HA. Analysis of the molecular weight (MW) distributions and three-dimensional excitation-emission matrix (EEM) fluorescence spectra of HAs revealed that the effectiveness in membrane fouling control is a result of changes in HA molecular characteristics. The TiO 2 /UV photocatalytic reactor caused the degradation of high MW, hydrophobic humic-like molecules to low MW, hydrophilic protein-like molecules, although this fraction was not completely removed during 150 min of treatment and was less responsible for membrane fouling.