CAJ | 학술논문

以硅胶为载体,采用浸渍-焙烧法制备了TiO2光催化剂,并将其用于二氧化氯/TiO2光催化氧化降解碱性品红模拟废水.经对比实验验证了ClO2/TiO2光催化剂/UV照射对碱性品红的氧化降解作用.50 mL质量浓度为150 mg.L-1的碱性品红模拟废水,在pH值为5.0,二氧化氯质量浓度6.14 mg.L-1和10 g.L-1光催化剂条件下,紫外照射距离20 cm,紫外照射时间13 min,碱性品红的去除率可达80%,远远高于二氧化氯化学氧化处理碱性品红的去除率46%.在废水处理过程中,采用紫外可见光谱和红外光谱分析降解产物,碱性品红被氧化降解为醌和羧酸,并进一步降解为二氧化碳和水,提出了二氧化氯/TiO2光催化氧化降解碱性品红废水的反应机理.
이규효위재체,채용침지-배소법제비료TiO2광최화제,병장기용우이양화록/TiO2광최화양화강해감성품홍모의폐수.경대비실험험증료ClO2/TiO2광최화제/UV조사대감성품홍적양화강해작용.50 mL질량농도위150 mg.L-1적감성품홍모의폐수,재pH치위5.0,이양화록질량농도6.14 mg.L-1화10 g.L-1광최화제조건하,자외조사거리20 cm,자외조사시간13 min,감성품홍적거제솔가체80%,원원고우이양화록화학양화처리감성품홍적거제솔46%.재폐수처리과정중,채용자외가견광보화홍외광보분석강해산물,감성품홍피양화강해위곤화최산,병진일보강해위이양화탄화수,제출료이양화록/TiO2광최화양화강해감성품홍폐수적반응궤리.
The photocatalyst TiO2 was prepared by dipping-calcination method using silica gel as catalyst support.The chlorine dioxide/TiO2 photocatalyst was used for the photocatalytic oxidation of simulated fuchsine wastewater.The degradation effect of fuchsine by the combination of chlorine dioxide,TiO2 photocatalyst and UV irradiation was confirmed by comparison test.The optimum treatment conditions were as follows：the volume of wastewater containing 150 mg·L-1 fuchsine was 50 mL;ClO2 concentration was 6.14 mg·L-1,pH value was 5.0;the distance between UV lamp and flask was 20 cm;UV irradiation time was 13 min;and photocatalyst dosage was 10 g·L-1.The removal efficiency of fuchsine could reach 80%,compared with 46% of chlorine dioxide chemical oxidation.With UV-vis and FT IR analysis technique,the intermediates in the degradation process were obtained.Fuchsine was degradated into quinone and carboxylic acid,and finally changed into carbon dioxide and water during the photocatalytic oxidation.The degradation reaction mechanism of fuchsine by chlorine dioxide/TiO2 photocatalytic oxidation was proposed.