Adsorption of Arsenate and Arsenite on Titanium Dioxide Suspensions

Dutta, Paritam K., Ray, Ajay K., Sharma, Virender K. and Millero, Frank J. (2004) Adsorption of Arsenate and Arsenite on Titanium Dioxide Suspensions. Journal of Colloid and Interface Science, 278 2: 270-275. doi:10.1016/j.jcis.2004.06.015

Author Dutta, Paritam K.
Ray, Ajay K.
Sharma, Virender K.
Millero, Frank J.
Title Adsorption of Arsenate and Arsenite on Titanium Dioxide Suspensions
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
Publication date 2004-10-15
Sub-type Article (original research)
DOI 10.1016/j.jcis.2004.06.015
Volume 278
Issue 2
Start page 270
End page 275
Total pages 6
Editor D. T. Wasan
Place of publication New York
Publisher Academic Press
Language eng
Subject 039901 Environmental Chemistry (incl. Atmospheric Chemistry)
Abstract Adsorption of arsenate (As(V)) and arsenite (As(III)) to two commercially available titanium dioxide (TiO2) suspensions, Hombikat UV100 and Degussa P25, was investigated as a function of pH and initial concentration of adsorbate ions. The BET surface area and zeta potential values of TiO2 were also measured to understand the difference in adsorption behavior of two suspensions. Both As(V) and As(III) adsorb more onto Hombikat UV100 particles than Degussa P25 particles. Adsorption of As(V) onto TiO2 suspensions was more than As(III) at pH 4 while the adsorption capacity of As(III) was more at pH 9. The electrostatic factors between surface charge of TiO2 particles and arsenic species were used to explain adsorption behavior of As(V) and As(III) at different pH. The Langmuir and Freundlich isotherm equations were used to interpret the nature of adsorption of arsenic onto TiO2 suspensions. The usefulness of adsorption data in removing arsenic in water is briefly discussed.
Keyword Colloids
Titanium dioxide
Point of zero charge
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Advanced Water Management Centre Publications
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Created: Wed, 04 Feb 2009, 08:55:55 EST by Ms Karen Naughton on behalf of Advanced Water Management Centre