Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.jcis.2011.01.095
Titel (primär) Sorption of aqueous antimony and arsenic species onto akaganeite
Autor Kolbe, F.; Weiß, H.; Morgenstern, P.; Wennrich, R.; Lorenz, W.; Schurk, K.; Stanjek, H.; Daus, B.
Journal / Serie Journal of Colloid and Interface Science
Erscheinungsjahr 2011
Department ANA; GWS
Band/Volume 357
Heft 2
Seite von 460
Seite bis 465
Sprache 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 %).
dauerhafte UFZ-Verlinkung
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