title: Heterogeneous uptake of gaseous hydrogen peroxide on mineral dust.
abstract: 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 H2O2 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 313K. The concentration of H2O2 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.
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: zhouli@iccas.ac.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: wangwg@iccas.ac.cn.
authors.forename: Weigang
authors.initials: W
authors.lastname: Wang
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: gemaofa@iccas.ac.cn.
authors.forename: Maofa
authors.initials: M
authors.lastname: Ge
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Shengrui
authors.initials: S
authors.lastname: Tong
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D001130:Arizona; D001272:Atmosphere; D002681:China; D004391:Dust / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007700:Kinetics; D008903:Minerals / Q000032:analysis / Q000737:chemistry*; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry; D013696:Temperature
chemical_list: D000393:Air Pollutants; D004391:Dust; D008903:Minerals; D052638:Particulate Matter; D006861:Hydrogen Peroxide
keywords: Heterogeneous uptake; Hydrogen peroxide; Mineral dust; Uptake coefficients