Adsorption and decomposition of water-dissolved ozone on high silica zeolites

被引：71

作者：

Fujita, H ^{[1
]}

Izumi, J ^{[1
]}

Sagehashi, M ^{[1
]}

Fujii, T ^{[1
]}

Sakoda, A ^{[1
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan

来源：

WATER RESEARCH | 2004年 / 38卷 / 01期

关键词：

ozone adsorption; siliceous zeolite; concentration; SiO2/Al2O3; Hydrophobicity;

D O I：

10.1016/S0043-1354(03)00382-8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption properties of water-dissolved ozone on high silica zeolites were investigated. Adsorbed ozone was desorbed almost reversibly. The adsorption equilibrium relations were described by a linear expression written as q = betaC, where q is the amount adsorbed, C is the equilibrium concentration and beta is the equilibrium constant. Also, the beta values were strongly dependent on the SiO2/Al2O3 ratio (mol/mol) and on the pore structure of the high silica zeolites. The larger the SiO2/Al2O3 ratio, the larger the value of beta. ZSM-5 (SiO2/Al2O3 ratio: 3000), which gave the highest adsorption capacity of water-dissolved ozone, was able to highly concentrate water-dissolved ozone on the adsorbent. The decomposition behavior of adsorbed ozone was also investigated. Ozone adsorbed on high silica zeolite was observed to be a little more stable than ozone existing in bulk water. The decomposition rate was independent of SiO2/Al2O3 ratios in the range of 30-3000 or a solution pH in the range of 4-6. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：159 / 165

页数：7

共 25 条

[11]

FUJITA H, IN PRESS WATER RES

[12] RESOLVING CRYSTALLOGRAPHICALLY DISTINCT TETRAHEDRAL SITES IN SILICALITE AND ZSM-5 BY SOLID-STATE NMR [J].

FYFE, CA ;

GOBBI, GC ;

KLINOWSKI, J ;

THOMAS, JM ;

RAMDAS, S .

NATURE, 1982, 296 (5857) :530-533

[13] Liquid and vapor phase adsorption of chlorinated volatile organic compounds on hydrophobic molecular sieves [J].

Giaya, A ;

Thompson, RW ;

Denkewicz, R .

MICROPOROUS AND MESOPOROUS MATERIALS, 2000, 40 (1-3) :205-218

[14]

Gunten U. von, 1996, Journal American Water Works Association, V88, P53

[15] KINETICS OF OZONE DECOMPOSITION - A DYNAMIC APPROACH [J].

GUROL, MD ;

SINGER, PC .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1982, 16 (07) :377-383

[16] Treatment of TCE- and PCE-contaminated groundwater using UV/H2O2 and O-3/H2O2 oxidation processes [J].

Hirvonen, A ;

Tuhkanen, T ;

Kalliokoski, P .

WATER SCIENCE AND TECHNOLOGY, 1996, 33 (06) :67-73

[17] Kinetics of oxidation of ammonia in solutions containing ozone with or without hydrogen peroxide [J].

Kuo, CH ;

Yuan, F ;

Hill, DO .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1997, 36 (10) :4108-4113

[18]

LALEZARYCRAIG S, 1988, J AM WATER WORKS ASS, V80, P73

[19] Degradation of atrazine by manganese-catalysed ozonation - Influence of radical scavengers [J].

Ma, J ;

Graham, NJD .

WATER RESEARCH, 2000, 34 (15) :3822-3828

[20] Use of water as a probe of zeolitic properties: interaction of water with HZSM-5 [J].

Olson, DH ;

Haag, WO ;

Borghard, WS .

MICROPOROUS AND MESOPOROUS MATERIALS, 2000, 35-6 :435-446

← 1 2 3 →