欢迎访问过程工程学报, 今天是

›› 2001, Vol. 1 ›› Issue (4): 0-0.

• 4 •    

钙镁离子对二氧化钛光催化氧化水中腐殖酸的影响

樊彩梅, 孙彦平   

  1. 太原理工大学化工学院化工系，山西 太原 030024
  • 出版日期:2001-08-20 发布日期:2001-08-20

Effect of Calcium and Magnesium on the Photocatalytic Oxidation of Humic Acid in Water over TiO2

FAN Cai-mei, SUN Yan-ping   

  1. Dept. Chem. Eng., Col. Chem. Eng. & Technol., Taiyuan Univ. Technol., Taiyuan, Shanxi 030024, China
  • Online:2001-08-20 Published:2001-08-20

PDF

被引次数

31

摘要： 考察了间歇反应器中钙离子存在下腐殖酸分子在TiO2颗粒表面的吸附行为，进而以125 W (Emax=365 nm) 汞灯为中心光源，考察了钙镁离子对二氧化钛光催化氧化水中腐殖酸的影响. 结果表明，在腐殖酸初始浓度C0=20 mg/L, [Ca2+]=80 mg/L, pH=7和TiO2=1 mg/ml实验条件下，经2.5 h的光催化反应，腐殖酸的脱色率为100%，氧化分解率接近100%，矿化率大于95%.

关键词: 钙离子, 镁离子, 腐殖酸, 光催化, 二氧化钛

Abstract: The feasibility study on degradation of organic phosphorous pesticide by photo-catalysis at the surface of titanium dioxide thin films was carried out. The films were prepared over different substrates by lower pressure chemical vapor deposition. The factors influencing the degradation rate of organic phosphorous pesticide were investigated. It was found that the optimal conditions for photo-catalytic conversion are copper wire as the substrate, annealing the film at 450oC and using the film as quickly as possible after it is deposited. It is also shown that when the pH of solution is equal to 2 and nitric acid is used to adjust pH, the degradation conversion is higher.

Key words: calcium ion, magnesium ion, humic acid, photocatalysis, titanium dioxide

中图分类号: