COMPARATIVE CATALYTIC ACTIVITY OF SELECTED METAL-OXIDES AND SULFIDES FOR THE PHOTOOXIDATION OF CYANIDE

被引：42

作者：

MIHAYLOV, BV ^{[1
]}

HENDRIX, JL ^{[1
]}

NELSON, JH ^{[1
]}

机构：

[1] UNIV NEVADA,DEPT CHEM,RENO,NV 89557

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1993年 / 72卷 / 02期

关键词：

D O I：

10.1016/1010-6030(93)85025-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photocatalytic oxidation of cyanide by TiO2 (anatase and rutile), ZnS, ZnO, CdS, V2O5, SiO2 and Fe2O3 was investigated and compared with the photo-oxidation in the absence of catalyst. Only TiO2 and ZnO are satisfactory catalysts. Cyanide is first oxidized to cyanate and then via nitrite to nitrate. In most systems cyanide is also volatilized as HCN. The amount of HCN volatilized is a function of the pH of the solution and the surface area of the catalyst and generally increases with decreasing pH and increasing surface area.

引用

页码：173 / 177

页数：5

共 13 条

[1] HETEROGENEOUS PHOTOCATALYTIC OXIDATION OF CYANIDE ION IN AQUEOUS-SOLUTIONS AT TIO2 POWDER [J].