Heterogeneous uptake of gaseous hydrogen peroxide on mineral dust

作     者：Li Zhou Weigang Wang Maofa Ge Shengrui Tong 

作者机构：Beijing National Laboratory for Molecular Science(BNLMS)State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesInstitute of ChemistryChinese Academy of Sciences 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2016年第28卷第2期

页      面：44-50页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (No.XDB05010400) the National Basic Research Program of China (973 Program) (No.2011CB403401) of Ministry of Science and Technology of China, the National Natural Science Foundation of China (Nos.41173112,21477134) 

主　　题：Hydrogen peroxide Mineral dust Heterogeneous uptake Uptake coefficients 

摘      要：The heterogeneous uptake processes of hydrogen peroxide on Arizona test dust and two types of authentic Chinese mineral dusts, i.e., Inner Mongolia desert dust and Xinjiang calciferous dust, were investigated using a Knudsen cell reactor coupled with a quadrupole mass spectrometer. The uptake coefficients were measured as a function of the initial concentration of H_2O_2 from 2.6 × 10^（11） to 1.2 × 10^（12）molecules/cm^3, and the temperature dependence of the uptake coefficients was investigated over a range from 253 to 313 K. The concentration of H_2O_2 showed little effect on the uptake coefficients of these heterogeneous processes. As a function of temperature, the initial uptake coefficients decrease with increasing temperature, whereas the steady state uptake coefficients of Arizona test dust and Inner Mongolia desert dust increase with increasing temperature. Implications for the understanding of the uptake processes onto mineral dust samples were also discussed.