| Title |
Treatment of Cu-EDTA by using Photocatalytic Oxidation Process -Comparison between UV Lamp and Solar Light- |
| Authors |
신인수 ( In Soo Shin ) ; 최봉종 ( Bong Jong Choi ) ; 이승목 ( Seung Mok Lee ) ; 양재규 ( Jae Kyu Yang ) |
| Keywords |
Cu(2)-EDTA; Solar Light intensity; UV; Ionic strength; Photocatalysis |
| Abstract |
Effect of the pH, molar ratio of Cu(Ⅱ)/EDTA, concentration of Cu(Ⅱ)-EDTA and ionic strength on the photocatalytic oxidation(PCO) of Cu(Ⅱ)-EDTA in solar light was studied in this work. Experimental results in this work were compared with previous results obtained with UV-lamp. In the kinetics, Cu(Ⅱ)-EDTA decomposition was favorable below neutral pH. The removal of Cu(Ⅱ) and DOC was favorable as TiO₂ dosage increased. The initial rate for the decomplexation of Cu(Ⅱ)-EDTA linearly increased as the concentration of Cu(Ⅱ)-EDTA increased. The removal of Cu(Ⅱ) and DOC was not much affected by variation of ionic strength with NaC1O₄ as a background ion while much reduction was observed in the presence of background ions having higher formal charges. The removal trend of Cu(Ⅱ) and DOC with variation of ionic strength and concentration of Cu(Ⅱ)-EDTA in solar light was similar with that in UV light. Variation of the molar ratio of Cu(Ⅱ)/EDTA showed a negligible effect on the removal of both Cu(Ⅱ) and DOC. However, removal of both Cu(Ⅱ) and DOC was two-times greater than that previous results obtained with UV light. |