화학공학소재연구정보센터
Journal of Hazardous Materials, Vol.164, No.2-3, 1480-1486, 2009
Remediation of phosphate-contaminated water by electrocoagulation with aluminium, aluminium alloy and mild steel anodes
The present study provides an electrocoagulation process for the remediation of phosphate-contaminated water using aluminium, aluminium alloy and mild steel as the anodes and stainless steel as the cathode. The various parameters like effect of anode materials, effect of pH, concentration of phosphate, current density, temperature and co-existing ions, and so forth, and the adsorption capacity was evaluated using both Freundlich and Langmuir isotherm models. The adsorption of phosphate preferably fitting the Langmuir adsorption isotherm suggests monolayer coverage of adsorbed molecules. The results showed that the maximum removal efficiency of 99% was achieved with aluminium alloy anode at a current density of 0.2 A dm(-2), at a pH of 7.0. The adsorption process follows second-order kinetics. (C) 2008 Elsevier B.V. All rights reserved.