Sorption materials for arsenic removal from water:: a comparative study
DOI: 10.1016/j.watres.2004.04.003
Title: Sorption materials for arsenic removal from water:: a comparative study
Journal Title: Water Research
Volume: 38
Issue: 12
Publication Date: July 2004
Start Page: 2948
End Page: 2954
Published online: online 28 May 2004
ISSN: 0043-1354
Affiliations:
  • UFZ Centre for Environmental Research Leipzig-Halle, Permoserstrasse 15, 04318 Leipzig, Germany
  • Abstract: ferent Sorption materials were tested in parallel for the removal of arsenic from water: activated carbon (AC), zirconium-loaded activated carbon (Zr-AC), a Sorption medium with the trade name ‘AbSorptionsmittel 3’ (AM3), zero-valent iron (Fe0), and iron hydroxide granulates (GIH). Batch and column tests were carried out and the behavior of the two inorganic species (arsenite and arsenate) was investigated separately. The Sorption kinetics of arsenate onto the materials followed the sequence Zr-AC?GIH=AM3>Fe0>AC. A different sequence was obtained for arsenite (AC?Zr-AC=AM3=GIH=Fe0). AC was found to enhance the oxidation reaction of arsenite in anaerobic batch experiments. The linear constants of the Sorption isotherms were determined to be 377, 89 and 87 for Zr-AC, AM3 and GIH, respectively. The uptake capacities yielded from the batch experiment were about 7 g l−1 for Zr-Ac and 5 g l−1 for AM3.Column tests indicated that arsenite was completely removed. The best results were obtained with GIH, with the arsenate not eluting before 13 100 pore volumes (inflow concentration 1 mg l−1 As) which corresponds to a uptake capacity of 2.3 mg g−1 or 3.7 g l−1.
    Accepted: 1 April 2004
    Received: 3 November 2003
    Revised: 18 March 2004
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    Copyright ? 2004 Elsevier Ltd. All rights reserved.
    Email: birgit.daus@ufz.de

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