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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...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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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. |
format | Online Article Text |
id | pubmed-10343666 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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