Ag-TiO2 광촉매 공정을 이용한 천연유기물질의 제거

Abstract

This study is to remove Natural Organic Matter(NOM) that existed in water and polluted in the water system. The optimum conditions for the removal of Natural Organic Matter(NOM) were investigated using photocatalytic oxidation, which is an advanced oxidation process. For the more effective photocatalytic reaction than the conventional photocatalytic reaction, Ag was added and the experiment was conducted. Response surface methodology (RSM) was used to find the appropriate amount of Ag injection. Humic acid and fulvic acid were selected as Natural Organic Matter(NOM). TiO2 was fixed to the reactor at 300 g/L and a UV lamp with a wavelength of 254 + 185 nm was used in the experiment. Experiments were conducted under the conditions of Ag of 0.15 - 5.8 g/L, reaction time of 10 - 70 min, and irradiation density of 9.5 - 13.7 W/L. Experimental results showed that the removal rate of humic acid and fulvic acid increased with increasing reaction time, irradiation density and the optimum removal rate was Ag 3.85 g/L.