• 제목, 요약, 키워드: UV/TiO$_2$, Fluidized bed

검색결과 4건 처리시간 0.04초

UV/TiO2와 유동층 반응기를 이용한 안료의 광촉매 탈색 (Photocatalytic Decolorization of Dye usingUV/TiO2 and Fluidized Bed Reactor)

  • 박영식
    • Journal of Environmental Science International
    • /
    • v.13 no.10
    • /
    • pp.921-928
    • /
    • 2004
  • The photocatalytic decolorization of Rhodamine B (RhB) was studied using immobilized $TiO_2$ and fluidized bed reactor. Immobilized $TiO_2$(length: 1$\~$2 mm, width: 1$\~$3 mm, thickness: 0.5$\~$2 mm) onto silicone sealant was employed as the photocatalyst and a 30 W germicidal lamp was used as the light source and the reactor volume was 4.8 L. The effects of parameters such as the amounts of photocatalyst, initial concentration, initial pH, superficial velocity, $H_2O_2$ and anion additives. ($NO_3^{-},\;SO_4^{2-},\;Cl^{-},\;CO_3^{2-}$) The results showed that the optimum dosage of the immobilized $TiO_2$ were 87.0 g/L. Initial removal rate of RhB of the immobilized $TiO_2$ was 1.5 times higher than that of the powder $TiO_2$ because of the adsorption onto the surface of immobilized $TiO_2$ In the conditions of acidic pH, initial reaction rate was increased slowly and reaction time was shorted. The effect of anion type on the reaction rate was not much.

GF/C에 고정된 TiO2와 유동층 반응기를 이용한 Rhodamine B의 광촉매 탈색 (Photocatalytic Decolorization of Rhodamine B using Immobilized TiO2 onto GF/C and Fluidized Bed Reactor)

  • 박영식;안갑환
    • Journal of Environmental Science International
    • /
    • v.12 no.12
    • /
    • pp.1277-1284
    • /
    • 2003
  • The photocatalytic oxidation of Rhodamine B (RhB) was studied using immobilized TiO$_2$ and fluidized bed reactor. Immobilized TiO$_2$ onto GF/C was employed as the photocatalyst and a 30 W germicidal lamp was used as the light source and the reactor volume was 4.8 L. The effects of parameters such as the amounts of photocatalyst, initial concentration, initial pH, air flow rate and anion additives (NO$_3$$\^$-/, SO$_4$$\^$2-/, Cl$\^$-/, CO$_3$$\^$2-/) competing for reaction. The results showed that the optimum dosage of the immobilized TiO$_2$ was 40.0 g/L. Initial removal rate of immobilized TiO$_2$ was expressed Langmuir - Hinshelwood equation.

고급산화공정에 의한 안료폐수 처리: 비교 연구 (Degradation of Dye Wastewater by Advanced Oxidation Process: A Comparative Study)

  • 박영식
    • Journal of Environmental Science International
    • /
    • v.15 no.1
    • /
    • pp.67-75
    • /
    • 2006
  • The degradation of Rhodamine B (RhB) in water was investigated in laboratory-scale experiments, using five advanced oxidation Processes (AOPs) $UV/H_2O_2$, lenten, photo-lenten, $UV/TiO_2,\;UV/TiO_2/H_2O_2$. The photodegradation experiments were carried out in a fluidized bed photoreactor equipped with an immersed 32 W UV-C lamp as light source. initial decolorization rate and COD removal efficiency were evaluated and compared. The results obtained showed that the initial decolorization rate constant was quite different for each oxidation process. The relative order of decolorization was: photo-fenton > $UV/TiO_2/H_2O_2$ > fenton > $UV/H_2O_2$ > $UV/TiO_2$ > UV > $H_2O_2$. The relative order of COD removal was different from decolorization: photo-fenten ${\fallingdotseq}$ $UV/TiO_2/H_2O_2\;>\;UV/TiO_2\;>\;fenton\;>\;UV/H_2O_2$. The Photo-lenten and $UV/TiO_2/H_2O_2$ processes seem to be appropriate for decolorization and COD removal of dye wastewater.

CFB-CVD법으로 제조된 TiO$_2$ 광촉매 비드를 이용한 포름알데히드의 분해 (Decomposition of Formaldehyde Using TiO$_2$ Photocatalyst Beads by Circulating Fluidized Bed Chemical Vapor Deposition)

  • 김경환;김유봉;이승용;박재현;임진영;정상철
    • 대한환경공학회지
    • /
    • v.30 no.7
    • /
    • pp.688-693
    • /
    • 2008
  • TTIP를 원료로 하여 순환유동층화학기상증착법으로 TiO$_2$ 광촉매 막이 코팅된 비드를 제조하였고, 광반응기에서 포름알데히드 수용액의 분해실험을 통하여 광촉매 비드의 활성을 평가 하였다. 포름알데히드의 광촉매 분해실험에서 자외선 강도, 순환유속 그리고 과산화수소의 첨가량이 증가함에 따라 분해속도가 증가하는 경향을 나타내었으며, 초기농도와 pH의 증가는 분해속도를 낮추는 결과를 가져왔다.