Contributions to electrochemical oxidation of cn-ion study
1 Department of Physical Chemistry, Technical University Iasi, Faculty of Industrial Chemistry, 71 Mangeron Blvd., 700050 Iasi, Romania
2 Department of Analytical Chemisty, Technical University Iasi, Faculty of Industrial Chemistry, 71 Mangeron Blvd., 700050 Iasi, Romania
2 Department of Analytical Chemisty, Technical University Iasi, Faculty of Industrial Chemistry, 71 Mangeron Blvd., 700050 Iasi, Romania
Abstract
Taking into account the practical importance of the electrochemical oxidation of the CN-ion from wastewaters, a systematically study was preformed, regarding the influences of the anode nature, current density, temperature and Cu2+ concentration on the rate of the overall electrolytic process. The cell optimal parameters were found to be: nickel anode, the anode-cathode interval of 2 cm, current density 0,65 A/dm2, concentration range (10-2-10-5) mol CN-/L, initial molar ratio c0(CN-)/c0(Cu2+) = 5/1 and temperature, under 500C. In these conditions, the specific consumption of energy is of (5-10) KWh/KgCN-.
Keywords
cyanide; electrochemical oxidation; anode; current density; temperature; Cu2+; catalyst