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유재정 ( Yu Jae Jeong ),민경석 ( Min Gyeong Seog ),박정민 ( Park Jeong Min ),황동진 ( Hwang Dong Jin ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.1
Reactive dyeing wastewater, a toxic and refractory pollutant, was treated by an electrochemical method using Ti/IrO₂ as anode and Stainless Steel 316 as cathode. A number of experiments were carried out in a batch and continuous system. Artificial samples and samples from mill were used for the treatment. Operation parameters, such as electrode shape(net or plate), the content of free chlorine evolution, effect of electrolyte, the effect of supporting electrolyte concentration, current density, pH and electrode gab were investigated for their influences on COD and color removal efficiencies during electrolysis. Finally, a continuous system using wastewater sampled from mill was operated. Results show that important factors for the increase in the pollutants removal efficiency were electrical properties of the electrode, the kind and concentration of electrolyte, and current density. The result indicate that the electrochemical treatment method is effective for the removal of color and COD from reactive dyeing wastewater.
정용준 ( Jeong Yong Jun ),목증상추 ( Mog Jeung Sang Chu ),민경석 ( Min Gyeong Seog ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.6
5 kinds of pesticides removal with 4 flat sheet NF membranes was examined in a stirred type batch cell experiment and rejection properties were reviewed in the point of solute characteristics. Rejection of Aldicarb, Diazinon, MEP, NAC and Malathion, which are mainly included in the drinking water quality standard, with NTR-729HF having nominal NaCl rejection of 92% was revealed over 91.5%. Molecular weight and width regarded as solute characteristics were applied to explain the rejection property and showed the relevant trend in NTR-729HF and NTR-7250 having relatively higher nominal NaCl rejection. log P as hydrophobicity also played a role on the factor of pesticide rejection. Concerning to pesticide rejection with NF membranes, these three factors should be reviewed together, not independently. In considering the efficiency of pesticides rejection efficiency with different NF membrane, the appropriate NF membrane should be selected for real system.