title: The treatment of zinc-cyanide electroplating rinse water using an electrocoagulation process.
abstract: This paper investigates the treatment of zinc-cyanide electroplating rinse water using an electrocoagulation process (ECP). The effects of operating parameters such as electrode material, current density (2.5-40 A/m(2)), operating time (0-60 min), initial pH (5-12) and electrode connection mode (monopolar parallel (MP-P), monopolar series and bipolar series) on the ECP were evaluated to find the optimum operating conditions. At 20 A/m(2), 60 min, the highest removal efficiencies were obtained with 85 and 99% for Fe and 64 and 33% for Al electrodes, for cyanide and zinc, respectively. The optimum operating conditions were found to be 30 A/m(2) and 40 min, for the Fe electrode at the original pH (9.5) of the rinse water. Considering efficiency and economy, the MP-P connection mode was determined as the optimum connection mode.
authors.affiliation: Gebze Institute of Technology, Department of Environmental Engineering, Gebze, 41400, Kocaeli, Turkey E-mail: e.senturk@gyte.edu.tr.
authors.forename: Elif
authors.initials: E
authors.lastname: Senturk
mesh_terms: D003486:Cyanides / Q000302:isolation & purification*; D055664:Electrochemical Techniques; D004566:Electrodes; D007501:Iron / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D015032:Zinc / Q000302:isolation & purification*
chemical_list: D003486:Cyanides; D007501:Iron; D062065:Wastewater; D014874:Water Pollutants, Chemical; D015032:Zinc