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Title (Primary) Sorption materials for arsenic removal from water: a comparative study
Author Daus, B.; Wennrich, R.; Weiss, H.
Journal Water Research
Year 2004
Department ANA; GWS
Volume 38
Issue 12
Page From 2948
Page To 2954
Language englisch
Keywords Arsenic; Sorption; Iron hydroxides; Water cleaning
Abstract

Five different 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.

Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=4023
Daus, B., Wennrich, R., Weiss, H. (2004):
Sorption materials for arsenic removal from water: a comparative study
Water Res. 38 (12), 2948 - 2954