TiO2-coated natural zeolite: Rapid humic acid adsorption and effective photocatalytic regeneration

被引：138

作者：

Liu, Sanly ^{[1
]}

Lim, May ^{[1
]}

Amal, Rose ^{[1
]}

机构：

[1] Univ New S Wales, Sch Chem Engn, ARC Ctr Excellence Funct Nanomat, Sydney, NSW 2052, Australia

来源：

CHEMICAL ENGINEERING SCIENCE | 2014年 / 105卷

基金：

澳大利亚研究理事会;

关键词：

Adsorption; Natural zeolite; Humic substances; Oxidation; Photocatalytic; TiO2; SURFACTANT MODIFIED ZEOLITE; ACTIVATED CARBON; ORGANIC-MATTER; REMOVAL; TIO2; WATER; DEGRADATION; SUBSTANCES; PARTICLES; SORPTION;

D O I：

10.1016/j.ces.2013.10.041

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Natural zeolite coated with titanium dioxide (TiO2) was used as an adsorbent to rapidly remove humic acid (HA) from an aqueous solution. Coating TiO2 onto zeolite markedly improved its efficiency in adsorbing HA: most of the bulk organic matter (80%) could be removed within 5 min of adsorption by the zeolite/TiO2 particles at neutral pH, whereas less than 20% was removed by bare zeolite alone. In addition, immobilisation of TiO2 onto zeolite permitted easier separation of the adsorbent from the treated water. Photocatalytic properties of TiO2 were exploited for the regeneration of the adsorbent. The adsorbent was shown to be readily regenerated by photocatalytic oxidation and was still effective in removing HA after 5 adsorption/regeneration cycles. These results indicate that TiO2-coated zeolite can be a very attractive adsorbent for the rapid removal of HA from aqueous solutions. (C) 2013 Elsevier Ltd. All rights reserved

引用

页码：46 / 52

页数：7

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