影像科学与光化学 ›› 2000, Vol. 18 ›› Issue (1): 7-11.DOI: 10.7517/j.issn.1674-0475.2000.01.7

• 研究论文 • 上一篇    下一篇

光催化降解磷酸酯类农药的研究

陈士夫1, 梁新2, 陶跃武2, 赵梦月2   

  1. 1. 淮北煤炭师范学院化学系, 淮北235000;
    2. 郑州工业大学化工系, 郑州450002
  • 收稿日期:1999-01-21 修回日期:1999-05-04 出版日期:2000-02-20 发布日期:2000-02-20
  • 通讯作者: 陈士夫
  • 基金资助:
    安徽省自然科学基金

STUDY ON THE PHOTOCATALYTIC DEGRADATION OF PHOSPHATE ESTER PESTICIDES

CHEN Shifu1, LIANG Xin2, TAO Yuewu2, ZHAO Mengyue2   

  1. 1. Department of Chemistry, Huaibei Coal Normal College, Huaibei 235000, P. R. China;
    2. Department of Chemical Engineer, Zhengzhou University of Technology, Zhengzhou 450002, P. R. China
  • Received:1999-01-21 Revised:1999-05-04 Online:2000-02-20 Published:2000-02-20

摘要: 以TiO2/beads作为光催化剂,研究了磷酸酯类农药光催化降解的规律.结果表明,低浓度的磷酸酯类农药光催化降解符合一级动力学方程;4.0×10-4mol/L的敌敌畏和久效磷农药,375W中压汞灯照射1.5h,其残留量小于10%,光照3.5h,有机磷被完全光催化降解至PO43-.

关键词: 光催化, 磷酸酯, 动力学

Abstract: The photocatalytic degradation of phosphate ester pesticides using TiO2/beads as a photocatalyst was studied. The results showed that the photocatalytic degradation reaction of the phosphate ester pesticides followed the first order kinetics, with 4 0×10-4 mol/L of dichlorvos and monocrotophos, the residual amount was lower than 10% after 1.5 h irradiation with a 375 W medium pressure mercury lamp, and the organophosphorous can be completely photocatalytically degraded into PO43- after 3.5 h irradiation.

Key words: photocatalytic degradation, phosphate ester, kinetics