摘要
Due to altering the budget of important trace gases and changing the composition of atmospheric aerosols,heterogeneous reactions between trace gases and liquid/solid aerosols have become an important subject of atmospheric science in recent years.However,the kinetics and mechanism of these reactions have not been well-understood yet.In recent years,we have established an integrated method to study a series of atmospheric heterogeneous reactions under control atmospheric conditions.Using on-line techniques,such as Diffuse Reflectance Infrared Fourier Transform spectroscopy,Raman microspectrometry and Knudsen cell,the heterogeneous reactions of a series of trace gases(NO2,SO2,H2O2,DMS,C2H5 I and Monocarboxylic acids)on mineral oxides and black carbon were investigated.The uptake coefficients and mechanisms at different atmospheric conditions(temperature,relative humidity and reactant concentration)were obtained.In addition,a home-made equipment named rotated wetted-wall reactor was designed for the in situinvestigations of the uptake of volatile organic compounds into the H2SO4 solution and H2SO4/H2O2 mixed solution.In this review,we present the main results obtained in our laboratory studies and propose some challenges that still exist in the heterogeneous reaction studies.
Due to altering the budget of important trace gases and changing the composition of atmospheric aerosols,heterogeneous reactions between trace gases and liquid/solid aerosols have become an important subject of atmospheric science in recent years.However,the kinetics and mechanism of these reactions have not been well-understood yet.In recent years,we have established an integrated method to study a series of atmospheric heterogeneous reactions under control atmospheric conditions.Using on-line techniques,such as Diffuse Reflectance Infrared Fourier Transform spectroscopy,Raman microspectrometry and Knudsen cell,the heterogeneous reactions of a series of trace gases(NO2,SO2,H2O2,DMS,C2H5 I and Monocarboxylic acids)on mineral oxides and black carbon were investigated.The uptake coefficients and mechanisms at different atmospheric conditions(temperature,relative humidity and reactant concentration)were obtained.In addition,a home-made equipment named rotated wetted-wall reactor was designed for the in situinvestigations of the uptake of volatile organic compounds into the H2SO4 solution and H2SO4/H2O2 mixed solution.In this review,we present the main results obtained in our laboratory studies and propose some challenges that still exist in the heterogeneous reaction studies.
基金
supported by the National Natural Science Foundation of China(Grant Nos.40925016 & 40830101)
