title: Remediation of phosphate-contaminated water by electrocoagulation with aluminium, aluminium alloy and mild steel anodes.
abstract: 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.
authors.affiliation: Central Electrochemical Research Institute, CSIR, Karaikudi, India. svdevan_2000@yahoo.com
authors.forename: Subramanyan
authors.initials: S
authors.lastname: Vasudevan
authors.forename: Jothinathan
authors.initials: J
authors.lastname: Lakshmi
authors.forename: Jeganathan
authors.initials: J
authors.lastname: Jayaraj
authors.forename: Ganapathy
authors.initials: G
authors.lastname: Sozhan
mesh_terms: D000535:Aluminum; D004564:Electrocoagulation / Q000379:methods*; D004566:Electrodes; D052918:Environmental Restoration and Remediation / Q000379:methods*; D010710:Phosphates / Q000302:isolation & purification*; D013232:Steel; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
chemical_list: D010710:Phosphates; D014874:Water Pollutants, Chemical; D013232:Steel; D000535:Aluminum