| Title: | Comparison of Gas-Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua |
| Author(s): | Qi W; Zhang Y; Shen M; Li L; Dai W; Chen Y; Liu Y; Guo X; Cao Y; Wang X; Jiang Y; Li J; |
| Address: | "State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China. Xi'an Institute for Innovative Earth Environment Research, Xi'an 710061, China. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China. National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Xi'an 710499, China" |
| DOI: | 10.3390/molecules28135276 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "Glyoxal and methylglyoxal are important volatile organic compounds in the atmosphere. The gas-particle partitioning of these carbonyl compounds makes significant contributions to O(3) formation. In this study, both the gas- and particle-phase glyoxal and methylglyoxal concentrations at the foot and top of Mount Hua were determined simultaneously. The results showed that the gaseous-phase glyoxal and methylglyoxal concentrations at the top were higher than those at the foot of the mountain. However, the concentrations for the particle phase showed the opposite trend. The average theoretical values of the gas-particle partitioning coefficients of the glyoxal and methylglyoxal concentrations (4.57 x 10(-10) and 9.63 x 10(-10) m(3) mug(-1), respectively) were lower than the observed values (3.79 x 10(-3) and 6.79 x 10(-3) m(3) mug(-1), respectively). The effective Henry's law constants (eff.K(H)) of the glyoxal and methylglyoxal were in the order of 10(8) to 10(9) mol/kgH2O/atm, and they were lower at the foot than they were at the top. The particle/gas ratios (P/G ratios) of the glyoxal and methylglyoxal were 0.039 and 0.055, respectively, indicating more glyoxal and methylglyoxal existed in the gas phase. The factors influencing the partitioning coefficients of the glyoxal and methylglyoxal were positively correlated with the relative humidity (RH) and negatively correlated with the PM(2.5) value. Moreover, the partitioning coefficient of the glyoxal and methylglyoxal was more significant at the top than at the foot of Mount Hua" |
| Keywords: | *Pyruvaldehyde *Glyoxal Gases Organic Chemicals Atmosphere Gly and mGly gas-particle partitioning influencing factors; |
| Notes: | "PubMed-not-MEDLINEQi, Weining Zhang, Yifan Shen, Minxia Li, Lu Dai, Wenting Chen, Yukun Liu, Yali Guo, Xiao Cao, Yue Wang, Xin Jiang, Yingkun Li, Jianjun eng 41977332/National Natural Science Foundation of China/ XAB2021YN01/West Light Foundation of the Chinese Academy of Sciences/ 2020407/Youth Innovation Promotion Association CAS/ Switzerland 2023/07/14 Molecules. 2023 Jul 7; 28(13):5276. doi: 10.3390/molecules28135276" |
