Partitioning of hydrogen peroxide in gas-liquid and gas-aerosol phases

Abstract. Hydrogen peroxide (H2O2) is a vital oxidant in the atmosphere and plays critical roles in the oxidation chemistry of both liquid and aerosol phases. The partitioning of H2O2 between the gas and liquid phase or the aerosol phase could affect its abundance in these condensed phases and eventually the formation of secondary components. However, the partitioning processes of H2O2 in gas-liquid and gas-aerosol phases are still unclear, especially in the ambient atmosphere. In this study, field observations of gas-, liquid-, and aerosol-phase H2O2 were carried out in the urban atmosphere of Beijing during the summer and winter of 2018. The effective field-derived mean value of Henry's law constant (HAm, 2.1 × 105 M atm−1) was 2.5 times that of the theoretical value in pure water (HAt, 8.4 × 104 M atm−1) at 298 ± 2 K. The effective derived gas-aerosol partitioning coefficient (KPm, 3.8 × 10−3 m3 μg−1) was four orders of magnitude higher on average than the theoretical value (KPt, 2.8 × 10−7 M atm−1) at 270 ± 4 K. The partitioning of H2O2 in the gas-liquid and gas-aerosol phases in the ambient atmosphere does not only obey Henry's law or Pankow's absorptive partitioning theory but is also influenced by certain physical and chemical reactions. The average concentration of liquid-phase H2O2 in rainwater during summer was 44.12 ± 26.49 μM. In three-quarters of the collected rain samples, the measured H2O2 was greater than the predicted value in pure water calculated by Henry's law. In these samples, 46 % of the measured H2O2 was from gas-phase partitioning, and most of the rest may have come from residual H2O2 in raindrops. In winter, the level of aerosol-phase H2O2 was 0.093 ± 0.085 ng μg−1, which was much higher than the predicted value based on Pankow's absorptive partitioning theory. Almost all aerosol-phase H2O2 was not from the partitioning of the gas phase. The decomposition/hydrolysis of aerosol-phase organic peroxides could be responsible for 32 % of aerosol-phase H2O2 formation at the maximum rate of 3.65 ng μg−1. Furthermore, the heterogeneous uptake of H2O2 on aerosols contributed to less than 0.5 %.

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Partitioning of hydrogen peroxide in gas-liquid and gas-aerosol phases

Atmospheric Chemistry and Physics ◽

10.5194/acp-20-5513-2020 ◽

2020 ◽

Vol 20 (9) ◽

pp. 5513-5526 ◽

Cited By ~ 2

Author(s):

Xiaoning Xuan ◽

Zhongming Chen ◽

Yiwei Gong ◽

Hengqing Shen ◽

Shiyi Chen

Keyword(s):

Hydrogen Peroxide ◽

Gas Phase ◽

Pure Water ◽

Average Concentration ◽

Urban Atmosphere ◽

Hydrolysis Rate ◽

Ambient Atmosphere ◽

Organic Peroxides ◽

Henry's Law ◽

Henry’S Law

Abstract. Hydrogen peroxide (H2O2) is a vital oxidant in the atmosphere and plays critical roles in the oxidation chemistry of both liquid and aerosol phases. The partitioning of H2O2 between the gas and liquid phases, or the aerosol phase, could affect its abundance in these condensed phases and eventually the formation of secondary components. However, the partitioning processes of H2O2 in gas-liquid and gas-aerosol phases are still unclear, especially in the ambient atmosphere. In this study, field observations of gas-, liquid-, and aerosol-phase H2O2 were carried out in the urban atmosphere of Beijing during the summer and winter of 2018. The effective field-derived mean value of Henry's law constant (HAm, 2.1×105 M atm−1) was 2.5 times of the theoretical value in pure water (HAt, 8.4×104 M atm−1) at 298±2 K. The effective derived gas-aerosol partitioning coefficient (KPm, 3.8×10-3 m3 µg−1) was 4 orders of magnitude higher on average than the theoretical value (KPt, 2.8×10-7 m3 µg−1) at 270±4 K. Beyond following Henry's law or Pankow's absorptive partitioning theory, the partitioning of H2O2 in the gas-liquid and gas-aerosol phases in the ambient atmosphere was also influenced by certain physical and chemical reactions. The average concentration of liquid-phase H2O2 in rainwater during summer was 44.12±26.49 µM. In 69 % of the collected rain samples, the measured level of H2O2 was greater than the predicted value in pure water calculated by Henry's law. In these samples, 41 % of the measured H2O2 was from gas-phase partitioning, while most of the rest may be from residual H2O2 in raindrops. In winter, the level of aerosol-phase H2O2 was 0.093±0.085 ng µg−1, which was much higher than the predicted value based on Pankow's absorptive partitioning theory. The contribution of partitioning of the gas-phase H2O2 to the aerosol-phase H2O2 formation was negligible. The decomposition/hydrolysis rate of aerosol-phase organic peroxides could account for 11 %–74 % of the consumption rate of aerosol-phase H2O2, and the value depended on the composition of organic peroxides in the aerosol particles. Furthermore, the heterogeneous uptake of HO2 and H2O2 on aerosols contributed to 22 % and 2 % of the aerosol-phase H2O2 consumption, respectively.

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Hybrid Gas/Liquid Electrical Discharge Reactors with Zeolites for Colored Wastewater Degradation

Journal of Advanced Oxidation Technologies ◽

10.1515/jaots-2005-0208 ◽

2005 ◽

Vol 8 (2) ◽

Cited By ~ 2

Author(s):

Hrvoje Kušić ◽

Natalija Koprivanac ◽

Igor Peternel ◽

Bruce R. Locke

Keyword(s):

Hydrogen Peroxide ◽

Liquid Phase ◽

Gas Phase ◽

Hydroxyl Radicals ◽

Electrical Discharge ◽

Organic Dye ◽

Electrical Discharges ◽

Colored Wastewater ◽

Ozone Levels ◽

Parallel Reactor

AbstractHybrid gas/liquid electrical discharge reactors have been used to degrade an organic dye in the presence and absence of zeolites. Simultaneous gas and liquid phase electrical discharges in the hybrid parallel and hybrid series reactors have been shown in previous work to lead to the formation of hydrogen peroxide and hydroxyl radicals in the liquid phase and ozone in the gas phase. These reactors differ in their electrode configuration, and in previous work it was shown that the ozone levels in the parallel reactor are seven times higher than in the series reactor (3000 ppm and 450 ppm, respectively), while both reactors produce the same levels of hydrogen peroxide (4.9 × 10

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Compilation of Henry's law constants (version 4.0) for water as solvent

Atmospheric Chemistry and Physics ◽

10.5194/acp-15-4399-2015 ◽

2015 ◽

Vol 15 (8) ◽

pp. 4399-4981 ◽

Cited By ~ 982

Author(s):

R. Sander

Keyword(s):

Gas Phase ◽

Environmental Chemistry ◽

Dilute Solution ◽

Henry's Law ◽

Cloud Droplets ◽

Henry’S Law ◽

Water As Solvent ◽

Equilibrium Ratio ◽

Henry’S Law Constants ◽

Henry's Law Constants

Abstract. Many atmospheric chemicals occur in the gas phase as well as in liquid cloud droplets and aerosol particles. Therefore, it is necessary to understand the distribution between the phases. According to Henry's law, the equilibrium ratio between the abundances in the gas phase and in the aqueous phase is constant for a dilute solution. Henry's law constants of trace gases of potential importance in environmental chemistry have been collected and converted into a uniform format. The compilation contains 17 350 values of Henry's law constants for 4632 species, collected from 689 references. It is also available at http://www.henrys-law.org.

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A New Thermodynamic Correlation for Apparent Henry's Law Constants, Infinite Dilution Activity Coefficient and Solubility of Mercaptans in Pure Water

Journal of Natural Gas Engineering ◽

10.7569/jnge.2017.692509 ◽

2017 ◽

Vol 2 (2) ◽

pp. 148-170

Author(s):

Rohani Mohd Zin ◽

Christophe Coquelet ◽

Alain Valtz ◽

Mohamed Abdul I. Mutalib ◽

Khalik Mohamad Sabil

Keyword(s):

Activity Coefficient ◽

Infinite Dilution ◽

Pure Water ◽

Henry's Law ◽

Henry’S Law ◽

Infinite Dilution Activity Coefficient ◽

Henry’S Law Constants ◽

Henry's Law Constants ◽

Thermodynamic Correlation

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Measurements of effective Henry's law constants for hydrogen peroxide in concentrated salt solutions

Atmospheric Environment ◽

10.1016/j.atmosenv.2005.01.025 ◽

2005 ◽

Vol 39 (16) ◽

pp. 2981-2989 ◽

Cited By ~ 5

Author(s):

M CHUNG ◽

S MUTHANA ◽

R PALUYO ◽

A HASSON

Keyword(s):

Hydrogen Peroxide ◽

Henry's Law ◽

Salt Solutions ◽

Henry’S Law ◽

Henry’S Law Constants ◽

Henry's Law Constants

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Exceeding of Henry's Law by Hydrogen Peroxide Associated with Urban Aerosols

Environmental Science & Technology ◽

10.1021/es0513786 ◽

2006 ◽

Vol 40 (16) ◽

pp. 4859-4866 ◽

Cited By ~ 53

Author(s):

Chuautemoc Arellanes ◽

Suzanne E. Paulson ◽

Philip M. Fine ◽

Constantinos Sioutas

Keyword(s):

Hydrogen Peroxide ◽

Henry's Law ◽

Urban Aerosols ◽

Henry’S Law

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Compilation of Henry's law constants, version 3.99

Atmospheric Chemistry and Physics Discussions ◽

10.5194/acpd-14-29615-2014 ◽

2014 ◽

Vol 14 (21) ◽

pp. 29615-30521 ◽

Cited By ~ 57

Author(s):

R. Sander

Keyword(s):

Gas Phase ◽

Environmental Chemistry ◽

Aerosol Particles ◽

Dilute Solution ◽

Henry's Law ◽

Cloud Droplets ◽

Henry’S Law ◽

Equilibrium Ratio ◽

Henry’S Law Constants ◽

Henry's Law Constants

Abstract. Many atmospheric chemicals occur in the gas phase as well as in liquid cloud droplets and aerosol particles. Therefore, it is necessary to understand the distribution between the phases. According to Henry's law, the equilibrium ratio between the abundances in the gas phase and in the aqueous phase is constant for a dilute solution. Henry's law constants of trace gases of potential importance in environmental chemistry have been collected and converted into a uniform format. The compilation contains 14775 values of Henry's law constants for 3214 species, collected from 639 references. It is also available on the internet at http://www.henrys-law.org.

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