Effect of competitive ions on the arsenic removal by mesoporous hydrous zirconium oxide from drinking water

被引：38

作者：

Bortun, Anatoly ^{[2
]}

Bortun, Mila ^{[2
]}

Pardini, James ^{[2
]}

Khainakov, Sergei A. ^{[1
]}

Garcia, Jose R. ^{[1
]}

机构：

[1] Univ Oviedo, Dept Quim Organ & Inorgan, E-33006 Oviedo, Spain

[2] MEL Chem Inc, Flemington, NJ 08822 USA

来源：

MATERIALS RESEARCH BULLETIN | 2010年 / 45卷 / 11期

关键词：

Inorganic compounds; Oxides; Phase equilibria; ADSORPTION;

D O I：

10.1016/j.materresbull.2010.07.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Adsorption properties of 302-type commercially available hydrous zirconium oxide (302-HZO) towards arsenic and some competitive anions and canons have been studied under batch and column conditions. Due to amphoteric properties, anion exchange performance of hydrous zirconium oxide is pH dependent. Media exhibits high affinity towards arsenic in a broad pH range, with high adsorption capacity at pH <8. It was shown that silicate and phosphate ions are arsenic's main competitors affecting media adsorption capacity. Presence of transition metal cations in <1 ppm does not affect 302-HZO capacity on arsenic, whereas alkaline-earth cations improve arsenic removal. The possibility for significant increase of 302-HZO adsorption capacity on arsenic at pH > 8 by using "solid acidifier" technique is discussed. Results of 302-HZO field trials are presented. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1628 / 1634

页数：7

共 14 条

[1] Kinetic and thermodynamic aspects of adsorption of arsenic onto granular ferric hydroxide (GFH) [J].