Abstract:
To study the effect of EDTA on cyanide removal from synthetic wastewater by ferrate oxidation. There were two parts of this study. In the first part, investigation of EDTA removal efficiency by ferrate oxidation with varying pH was performed. In the second part, the effect of EDTA on the efficiency of cyanide removal by ferrate oxidation was studied with these following conditions: varying pH, molar ratio of ferrate to EDTA and molar ratio of ferrate to cyanide. Reaction by product was also determined. With molar ratio of one to one, ferrate did not effectively remove EDTA from the EDTA synthetic wastewater for the range of pH studied. The highest efficiency of EDTA removal was 40% at pH 10. At molar ratio of cyanide to EDTA TO FERRATE OF 1:1:1, cyanide was still effectively removed by ferrate oxidation. It was found that >= 99% cyanide removal was achieved at pH 10. However, at molar concentration of EDTA higher than molar concentration of cyanide, cyanide removal efficiency decreased. Reaction major by product from reaction was found to be cyanate.