Evaluation of humic acid removal by a flat submerged membrane photoreactor

被引：13
作者：
Wei Yong [1 ,2 ]
Chu HuaQiang [1 ]
Dong BingZhi [1 ]
Li Xuan [1 ]
机构：
[1] Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
[2] Changzhou Univ, Sch Environm & Safety Engn, Changzhou 213164, Peoples R China
来源：
CHINESE SCIENCE BULLETIN | 2011年 / 56卷 / 32期
关键词：
TiO(2)/UV; natural organic matter; membrane fouling; molecular weight distribution; excitation and emission matrix; NATURAL ORGANIC-MATTER; CROSS-FLOW MICROFILTRATION; LOW-PRESSURE MEMBRANES; WATER-TREATMENT; ULTRAFILTRATION MEMBRANES; PHOTOCATALYTIC OXIDATION; TIO2; PHOTOCATALYSIS; SURFACE-WATER; FLUORESCENCE; REACTOR;
D O I：
10.1007/s11434-011-4712-8
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
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 mu 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.
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页码：3437 / 3444
页数：8
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