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Enhanced Cr(VI) Removal by Nanozerovalent Iron-Immobilized Alginate Beads in the Presence of a Biofilm in a Continuous-Flow Reactor
Ravikumar K.V.G, Kumar D, Kumar G, , Natarajan C, ,
Published in American Chemical Society (ACS)
Volume: 55
Issue: 20
Pages: 5973 - 5982
Cr(VI) removal was investigated in a fixed-bed column using nanozerovalent iron-immobilized calcium alginate beads (nZVI-C-A beads) and a biofilm formed on nZVI-C-A beads. The removal studies were performed at various initial Cr(VI) concentrations, different flow rates, and bed heights. Under optimal conditions, nZVI-C-A beads showed 91.35 ± 1.57% Cr(VI) removal and 320.66 ± 3.87 mg/g removal capacity. For biofilm-coated nZVI-C-A beads, the removal percentage and removal capacity were found to be 97.84 ± 0.56% and 473.9 ± 4.84 mg/g, respectively. Breakthrough data were successfully described by the Thomas and Yoon-Nelson model for removal of Cr(VI) using nZVI-C-A and a biofilm on nZVI-C-A beads. Cr(VI) sorption on nZVI-C-A beads and biofilm-coated nZVI-C-A beads were confirmed by X-ray diffraction, energy-dispersive analysis of X-rays, and Fourier transform infrared. © 2016 American Chemical Society.
About the journal
JournalData powered by TypesetIndustrial & Engineering Chemistry Research
PublisherData powered by TypesetAmerican Chemical Society (ACS)
Open Access0
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