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- Title
ASSESSMENT OF OPERATIONAL PARAMETERS AND PROCESS MECHANISM FOR REMOVAL OF CHROMIUM FROM AQUEOUS EFFLUENTS BY ELECTROCOAGULATION METHOD.
- Authors
KHOSA, M. K.; SAIF, M. J.; JAMAL, M. A.; MUNEER, M.; FAZAL-UR-REHMAN; HUSSAIN, A.; MUNEER, H.
- Abstract
Electrocoagulation is the distinct economical and environmental choice for meeting discharge consent standards. It eliminates the need for costly chemical addition. Being a non-additive process it can result in a very low final dissolved solids content thus enabling the water to be reused in many instances. The present work is based on treatment of wastewater containing Cr(III) and Cr(VI) by electrocoagulation process using aluminum and iron electrodes. Batch mode was selected to carry out all the experiments. The tank was filled with synthetic wastewater containing Cr(III) and Cr(VI) and their removal efficiency were investigated by electrocoagulation process. Several parameters were optimised such as contact time, pH, electro-coagulant dose, conductance, and current density to achieve a higher removal capacity. Maximum removal of Cr(III) and Cr(VI) takes place at optimised time of 10 min, pH of 7, electrocoagulant dose 0.25 and at applied voltage of 12 V. The concentration of chromium was further determined by atomic absorption spectroscopy. The results showed that electro-coagulation (EC) process has potential to be utilised for the cost-effective removal of chromium from wastewater specially the 'tannery effluents' by using iron electrodes in terms of high removal efficiencies and operating cost.
- Subjects
CHROMIUM analysis; EFFLUENT quality; ELECTROCOAGULATION (Chemistry); WATER quality; WASTE management
- Publication
Oxidation Communications, 2016, Vol 39, Issue 4-II, p3435
- ISSN
0209-4541
- Publication type
Article