N-Zn/TiO2光催化氧化脱硫废液中亚硫酸钠的研究

doi:10.11962/1006-4990.2019-0598

Abstract

Abstract:

N-Zn co-doped TiO₂ catalyst（N-Zn/TiO₂） was synthesized by sol-gel method and then was applied in photo-oxidation of sodium sulfite in double alkali desulfurization wastewater.The morphology and structure of N-Zn/TiO₂ catalyst were characterized by XRD,FT-IR,XPS and FESEM.The effects of catalyst dosage,pH of solution,air flow rate and initial concentration of Na₂SO₃ on photocatalytic activities of N-Zn/TiO₂ catalyst were investigated.The results showed that N-Zn/TiO₂ catalyst could completely oxide Na₂SO₃ within 1.5 h.However,it takes 8 h to completely oxide the same pollutants without catalysts.The oxidation rate of Na₂SO₃ increased with the increasing of catalyst dosage.In addition,with the increasing of pH,the reaction rate firstly increased and then began to fall.The optimal reaction conditions were obtained as follow：catalyst dosage（the mass ratio of catalyst to Na₂SO₃） was 1/100, pH=6.5 and air flow rate was 4 L/min.

Key words: nitrogen-zinc co-doped titanium dioxide, photocatalytic oxidation, double alkali desulfurization wastwater, sodium sulfite

CLC Number:

TQ426.6

Hu Min,Guo Jia,Wu Huadong,Zhang Linfeng. Photocatalytic oxidation of sodium sulfite in desulfurization wastewater by N-Zn/TiO₂[J]. Inorganic Chemicals Industry, 2020, 52(10): 151-156.

Figures/Tables 10

References 28

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物质	含量/（mg·L^-1）	物质	含量/（mg·L^-1）
SO₃^2-	3.8×10⁴	Li	4.08
Al	6.42	Mg	1.72
Si	21.24	Fe	4.27
Ca	13.01

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Photocatalytic oxidation of sodium sulfite in desulfurization wastewater by N-Zn/TiO₂

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Photocatalytic oxidation of sodium sulfite in desulfurization wastewater by N-Zn/TiO2