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).
Iron(II) Modified Natural Zeolites for Hexavalent Chromium Removal from Contaminated Water / Lofu, Antonio; Mastrorilli, Piero; Dell'Anna, Maria Michela; Mali, Matilda; Sisto, Raffaello; Vignola, Rodolfo. - In: ARCHIVES OF ENVIRONMENTAL PROTECTION. - ISSN 2083-4810. - ELETTRONICO. - 42:1(2016), pp. 35-40. [10.1515/aep-2016-0004]
Iron(II) Modified Natural Zeolites for Hexavalent Chromium Removal from Contaminated Water
Lofu, Antonio;Piero Mastrorilli;Maria Michela Dell’Anna;Matilda Mali;
2016-01-01
Abstract
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).| File | Dimensione | Formato | |
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