Iron(II) modified natural zeolites for hexavalent chromium removal from contaminated water

Autor: Lofù Antonio, Mastrorilli Piero, Dell’Anna Maria Michela, Mali Matilda, Sisto Raffaello, Vignola Rodolfo
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Archives of Environmental Protection, Vol 42, Iss 1, Pp 35-40 (2016)
Druh dokumentu: article
ISSN: 2083-4810
DOI: 10.1515/aep-2016-0004
Popis: Three different types of Fe(II)-modified natural zeolites were tested as supports in continuous-flow columns for the treatment of Cr(VI) contaminated water. The natural zeolites chosen as support were commercially available Zeosand (80% clinoptilolite), ATZ (79% phillipsite/chabazite), and ZS-55RW (90% Chabazite). All the examined modified zeolites turned out active for hexavalent chromium abatement, lowering its concentration below the European regulation level, even at relatively high flow rates (40 mL/h, linear velocity 15 cm/h). Zeosand, having a broader pH range of stability, was found to be the best one in terms of both Fe(II) uptake (0.54 wt%) and Cr removal (90 mg Cr/Kg zeolite).
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