HETEROGENEOUS PHOTOCATALYTIC DECOMPOSITION OF POLYAROMATIC HYDROCARBONS OVER TITANIUM-DIOXIDE

被引：65

作者：

IRELAND, JC

DAVILA, B

MORENO, H

FINK, SK

TASSOS, S

机构：

[1] TECHNOL APPLICAT INC,CINCINNATI,OH 45268

[2] FLORIDA INT UNIV,DEPT CIVIL & ENVIRONM ENGN,MIAMI,FL 33199

来源：

CHEMOSPHERE | 1995年 / 30卷 / 05期

关键词：

D O I：

10.1016/0045-6535(94)00452-Z

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photocatalytic degradation of a mixture of 16 polyaromatic hydrocarbons (PAHs) was investigated in aqueous suspensions of high surface area TiO2 illuminated with 310-380 nm ultraviolet light. Triethylamine was utilized for extraction of PAH compounds from motor oil contaminated soil and subsequently to increase PAH solubilities in TiO2/water slurries. Minimum steady-state hydroxyl radical (HO .) concentrations generated during photocatalysis were determined directly by electrospray ionization mass spectrometry analysis of a stable spin-trapped HO . adduct. In contrast to organic Compounds like trichloroethylene which are readily mineralized over TiO2, the PAHs investigated here were relatively slow to degrade although several compounds (acenaphthylene, anthracene, benzo(a)pyrene, and dibenzo(a,h)anthracene) displayed exceptional decomposition kinetics.

引用

页码：965 / 984

页数：20

共 35 条

[1] PHOTOMICROELECTROCHEMICAL DETOXIFICATION OF HAZARDOUS MATERIALS [J].