| Vanadium removal from water by waste metal sludge and cement immobilization |
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학술지명 Chemical Engineering Journal
저자 김형수,정현근,김성헌,이기현,민부기,Amit Bhatnagar,Ashwani Kumar,Deepak Pudasainee,전병훈
발표일 2008-10-01
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The present study was first carried out to investigate the adsorption potential of metal sludge (a waste product of electroplating industry) inremoving vanadium from water. The adsorption capacity of metal sludge for vanadium was found 24.8 mg/g at 25 ?C. The adsorption was studiedas a function of contact time (0.5?10 h), concentration (1.5×10?4?9.5×10?4 M) and temperature (25 and 45 ?C) by batch method. The adsorptionhas been found to be endothermic and data conform to Langmuir model. The analysis of kinetic data indicates that present adsorption system is apseudo-first-order process and intraparticle diffusion controlled. After adsorption studies, the metal-laden sludge adsorbent was immobilized intothe cement for its ultimate disposal. Physical properties such as initial and final setting time, compressive strength of cement stabilized wastes weretested to see the effect of metal-laden sludge in cement. The results of present study clearly reveal that metal sludge can be fruitfully employed intreating industrial effluents containing vanadium and further safely dispose of by immobilizing it into cement. The proposed technology providesa two-fold advantage of wastewater treatment and solid waste management.ⓒ 2008 Elsevier B.V. All rights reserved. |