Publication Details

Reference Category Journals
DOI / URL link
Title (Primary) Sorption of aqueous antimony and arsenic species onto akaganeite
Author Kolbe, F.; Weiß, H.; Morgenstern, P.; Wennrich, R.; Lorenz, W.; Schurk, K.; Stanjek, H.; Daus, B.
Journal Journal of Colloid and Interface Science
Year 2011
Department ANA; GWS
Volume 357
Issue 2
Page From 460
Page To 465
Language englisch
Keywords arsenic species; antimony species; sorption isotherms; sorption competition; water treatment
Abstract Two akaganeite materials were tested for the removal of antimonate, trimethyl antimonate, arsenate, arsenite and dimethyl arsenate from water: a commercial product (GEH) and a synthesized akaganeite. The two materials show similar qmax values, but differ in their KL values. This could be a result of their different crystal sizes indicated by sharper XRD reflecions of the synthesized akaganeite compared with GEH. Batch experiments were carried out using all species to investigate the influence of the pH on their sorption onto the commercial material. The best results for the removal of antimonate and arsenate were achieved under acidic conditions, while the sorption of arsenite has an optimum at pH 7. The maximum loadings vary from 450 mg g-1 (antimonate at pH 2.2.) to 2 mg g-1 (trimethyl antimonate at pH 7). Competition reactions (up to a 10-fold excess of the competitor ion) were studied with antimonate, arsenate and phosphate. The sorption capacity of arsenate decreases up to 12.5 % by adding phosphate (ratio 1:10), but the addition of antimonate did not influence the sorption of arsenate. Conversely, the sorption of antimonate decreases due to the addition of 10-fold concentration of arsenate (31 %) or phosphate (27 %).
Persistent UFZ Identifier
Kolbe, F., Weiß, H., Morgenstern, P., Wennrich, R., Lorenz, W., Schurk, K., Stanjek, H., Daus, B. (2011):
Sorption of aqueous antimony and arsenic species onto akaganeite
J. Colloid Interface Sci. 357 (2), 460 - 465