Kinetic and Thermodynamic Aspects of Adsorption of Arsenic onto Granular Ferric Hydroxide (GFH)

Impacts of temperature and pH on the arsenic removal kinetics and capacities, are estimated. Temperature and pH play an important role in the arsenic adsorption kinetics. The uptake rates of both arsenic (V) and arsenic (III) increase with increase in temperature. At lower pH, arsenic (V) exhibits g...

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Bibliographic Details
Published in:Water research (Oxford) 2008-02, Vol.42 (3), p.3371-3371
Main Authors: Banerjee, Kashi, Amy, Gary L, Prevost, Michele, Nour, Shokoufeh, Jekel, Martin, Gallagher, Paul M, Blumenschein, Charles D
Format: Article
Language:English
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Summary:Impacts of temperature and pH on the arsenic removal kinetics and capacities, are estimated. Temperature and pH play an important role in the arsenic adsorption kinetics. The uptake rates of both arsenic (V) and arsenic (III) increase with increase in temperature. At lower pH, arsenic (V) exhibits greater removal rates than arsenic (III) and is best removed when the media is in the protonated form. Arsenic (III) removal kinetics is more efficient, and the adsorption capacity is greater when neutral surface sites predominated. The adsorption of arsenic (V) and arsenic (III) onto granular ferric hydroxide (GFH) is an endothermic process, indicating that the adsorption capacity increases with increase in temperature and is spontaneous at the temperature studied.
ISSN:0043-1354