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Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua

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...

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Autores principales: Qi, Weining, Zhang, Yifan, Shen, Minxia, Li, Lu, Dai, Wenting, Chen, Yukun, Liu, Yali, Guo, Xiao, Cao, Yue, Wang, Xin, Jiang, Yingkun, Li, Jianjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10343666/
https://www.ncbi.nlm.nih.gov/pubmed/37446934
http://dx.doi.org/10.3390/molecules28135276
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author Qi, Weining
Zhang, Yifan
Shen, Minxia
Li, Lu
Dai, Wenting
Chen, Yukun
Liu, Yali
Guo, Xiao
Cao, Yue
Wang, Xin
Jiang, Yingkun
Li, Jianjun
author_facet Qi, Weining
Zhang, Yifan
Shen, Minxia
Li, Lu
Dai, Wenting
Chen, Yukun
Liu, Yali
Guo, Xiao
Cao, Yue
Wang, Xin
Jiang, Yingkun
Li, Jianjun
author_sort Qi, Weining
collection PubMed
description 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 × 10(−10) and 9.63 × 10(−10) m(3) μg(−1), respectively) were lower than the observed values (3.79 × 10(−3) and 6.79 × 10(−3) m(3) μg(−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.
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spelling pubmed-103436662023-07-14 Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua Qi, Weining Zhang, Yifan Shen, Minxia Li, Lu Dai, Wenting Chen, Yukun Liu, Yali Guo, Xiao Cao, Yue Wang, Xin Jiang, Yingkun Li, Jianjun Molecules Article 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 × 10(−10) and 9.63 × 10(−10) m(3) μg(−1), respectively) were lower than the observed values (3.79 × 10(−3) and 6.79 × 10(−3) m(3) μg(−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. MDPI 2023-07-07 /pmc/articles/PMC10343666/ /pubmed/37446934 http://dx.doi.org/10.3390/molecules28135276 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Qi, Weining
Zhang, Yifan
Shen, Minxia
Li, Lu
Dai, Wenting
Chen, Yukun
Liu, Yali
Guo, Xiao
Cao, Yue
Wang, Xin
Jiang, Yingkun
Li, Jianjun
Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua
title Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua
title_full Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua
title_fullStr Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua
title_full_unstemmed Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua
title_short Comparison of Gas–Particle Partitioning of Glyoxal and Methylglyoxal in the Summertime Atmosphere at the Foot and Top of Mount Hua
title_sort comparison of gas–particle partitioning of glyoxal and methylglyoxal in the summertime atmosphere at the foot and top of mount hua
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10343666/
https://www.ncbi.nlm.nih.gov/pubmed/37446934
http://dx.doi.org/10.3390/molecules28135276
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