Paper
Removal of Hexavalent Chromium from Effluents by Indirect Reduction in a Redox Flow Galvanic Cell with Mesh Electrodes
- Authors:
- Magdy M. Zaki; Inderjit Nirdosh; Gomaa H. Sedahmed
- Abstract
- Indirect reduction of hexavalent chromium to trivalent chromium by ferrous sulphate in the redox flow galvanic cell: Fe3+, Fe2+│Cr6+, Cr3+ with mesh electrodes was studied by measuring the polarization behaviour of the cell under different solution flow rates and different reactant concentrations. It was found that the rate of Cr6+ reduction as indicated by the cell current increases with increasing solution flow rate and reactant concentration. Within the present range of conditions, indirect Cr6+ reduction by FeSO4 was found to be under mixed mass and charge transfer control. The advantages of the present technique over direct hexavalent chromium reduction by iron scrap were highlighted. Possible practical applications of the technique in treating industrial effluents containing Cr+6 were noted.
- Keywords
- Water Pollution; Hexavalent Chromium Removal; Redox Flow Galvanic Cell
- StartPage
- 14
- EndPage
- 19
- Doi