Heterogeneous photochemical reaction of ozone with anthracene adsorbed on mineral dust

被引：15

作者：

Ma, Jinzhu ^{[1
]}

Liu, Yongchun ^{[1
]}

Ma, Qingxin ^{[1
]}

Liu, Chang ^{[1
]}

He, Hong ^{[1
]}

机构：

[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

来源：

ATMOSPHERIC ENVIRONMENT | 2013年 / 72卷

基金：

中国国家自然科学基金;

关键词：

Anthracene; TiO2; Asian dust storm particles; Ozone; Heterogeneous photochemical reactions; Kinetics; POLYCYCLIC AROMATIC-HYDROCARBONS; KINETICS; PHOTODECOMPOSITION; IRRADIATION; PRODUCTS; SURFACES; AEROSOL; PYRENE;

D O I：

10.1016/j.atmosenv.2013.02.039

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The heterogeneous reactions of O-3 with anthracene adsorbed on TiO2 and on Asian dust storm particles were investigated in the dark and in the presence of light. The reaction rate constants of the heterogeneous reaction between O-3 and anthracene adsorbed on TiO2 were increased by a factor of 1.5 in the presence of light compared to the dark conditions. Anthraquinone, which was identified as the main surface product of anthracene reacted with O-3 in the dark, can react with O-3 quickly in the presence of light. The reactions on Asian dust storm particles exhibited pseudo-first-order kinetics for anthracene loss, and the reactions between O-3 and anthracene adsorbed on Asian dust storm particles proceed by the Langmuir-Hinshelwood mechanism in the dark and in the presence of light. At extremely high ozone concentrations, the degradation of anthracene is enhanced by a factor of 3 in the presence of light compared to the dark conditions. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.

引用

页码：165 / 170

页数：6

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