409064 Hybrid Anion Exchange/Activated Carbon for Cr(VI) Removal in Drinking Water

Sunday, November 8, 2015
Exhibit Hall 1 (Salt Palace Convention Center)
Weihua Zheng1, James Langer1 and James Economy2, (1)Serionix, Inc., Champaign, IL, (2)Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, IL

A novel hybrid anion exchangeable activated carbons (HACAX) is synthesized through chemical modification of porous carbon surface. Ion exchange capacity, kinetics and regeneration tests suggest that HACAX contains stable positive charged functional groups. The surface characterization results suggest HACAX not only contains stable positive charged functional groups, but also a broad spectrum of surface oxygen functional groups. In the study of adsorption of hexavalent chromium, HACAX shows excellent kinetics, selectivity and regeneration efficiency towards Cr (VI). Combined with rich surface oxygen functional groups, this material provides a pathway to adsorb and convert Cr(VI) into Cr(III) at natural pH. The results suggest HACAX could potentially provide an effective point-of-use (POU) solution for hexavalent chromium removal from drinking water.

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