Preprints
https://doi.org/10.5194/amt-2022-211
https://doi.org/10.5194/amt-2022-211
 
25 Jul 2022
25 Jul 2022
Status: this preprint is currently under review for the journal AMT.

Reactive uptake coefficients for multiphase reactions determined by a dynamic chamber system

Guo Li1, Hang Su1, Meng Lia,b,1, Uwe Kuhn1, Guangjie Zheng1, Lei Hanc,1, Fengxia Bao1, Ulrich Pöschl1, and Yafang Cheng1 Guo Li et al.
  • 1Max Planck Institute for Chemistry, Mainz, Germany
  • anow at: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
  • bnow at: NOAA Chemical Sciences Laboratory, Boulder, CO, USA
  • cnow at: Department of Health and Environmental Sciences, Xi’an Jiaotong-Liverpool University, Suzhou, China

Abstract. Dynamic flow-through chambers are frequently used to measure gas exchange rates between the atmosphere and biosphere on the Earth’s surface such as vegetation and soils. Here, we explore the performance of a dynamic chamber system in determining the uptake coefficient γ of exemplary gases (O3 and SO2) on bulk solid-phase samples. After characterization of the dynamic chamber system, the derived γ is compared with that determined from a coated-wall flow tube system. Our results show that the dynamic chamber system and the flow tube method show a good agreement for γ in the range of 10-8 to 10-3. The dynamic chamber technique can be used for liquid samples and real atmospheric aerosol samples without complicated coating procedures, which complements the existing techniques in atmospheric kinetic studies.

Guo Li et al.

Status: open (until 06 Sep 2022)

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Guo Li et al.

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Short summary
A large fraction of previous studies using dynamic flow chambers was to quantify gas exchange in terms of flux or deposition/emission rate. Here, we extended the usage of this technique to examine uptake kinetics on sample surfaces. The good performance of the chamber system was validated. This technique can be further used for liquid samples and real atmospheric aerosol samples without complicated coating procedures, which complements the existing techniques in atmospheric kinetic studies.