Hexavalent chromium reduction using a fixed bed of scrap bearing iron spheres

Kinetics of hexavalent chromium reduction to trivalent chromium in a fixed bed of scrap bearing iron spheres was investigated under different conditions of initial concentration of a synthetic solution of acidified potassium dichromate, solution flow rate, bed height, iron spheres diameter, and solu...

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Bibliographic Details
Published inDesalination Vol. 185; no. 1; pp. 307 - 316
Main Authors El-Shazly, A.H., Mubarak, A.A., Konsowa, A.H.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.11.2005
Elsevier
Subjects
Applied sciences
Chemical engineering
Exact sciences and technology
Fixed bed
General purification processes
Heat and mass transfer. Packings, plates
Hexavalent chromium
Iron spheres
Pollution
Reduction
Wastewaters
Water treatment and pollution
Hexavalent chromium
Reduction
Fixed bed
Iron spheres
Mass transfer coefficient
Industrial waste water
Kinetics
Thermodynamic properties
Diffusion
Activation energy
Mass transfer
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Summary:Kinetics of hexavalent chromium reduction to trivalent chromium in a fixed bed of scrap bearing iron spheres was investigated under different conditions of initial concentration of a synthetic solution of acidified potassium dichromate, solution flow rate, bed height, iron spheres diameter, and solution temperature. the activation energy of the reaction was found to be 4.51 kcal/mol which shows that the reaction is diffusion controlled. The mass transfer coefficient of the reaction was related to other parameters by simple equations. Implications of the present results for treatment of industrial wastewater containing Cr such as metal finishing industry effluents are noted.
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ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2005.03.083