Reinvestigation of the Acetone Degradation Mechanism in Dilute Aqueous Solution by the UV/H<sub>2</sub>O<sub>2</sub> Process

Stefan, Mihaela I.; Bolton, James R.

doi:10.1021/es9808548

Cited by 108 publications

(146 citation statements)

References 11 publications

Supporting

Mentioning

131

Contrasting

Order By: Relevance

“…H 2 O 2 ) . While H 2 O 2 itself reacts only slowly with organic carbonyl compounds (Stefan and Bolton, 1999), it might be a precursor for OH (either by photolysis, or by Fenton reaction with Fe 2+ or Cu + ) and thus could provide an additional radical source in the aqueous phase that could start OH-initiated processes.…”

Section: Carbonyl Compounds (≤C 5 )mentioning

confidence: 99%

Secondary organic aerosol formation in cloud droplets and aqueous particles (aqSOA): a review of laboratory, field and model studies

2011

View full text Add to dashboard Cite

Abstract. Progress has been made over the past decade in predicting secondary organic aerosol (SOA) mass in the atmosphere using vapor pressure-driven partitioning, which implies that SOA compounds are formed in the gas phase and then partition to an organic phase (gasSOA). However, discrepancies in predicting organic aerosol oxidation state, size and product (molecular mass) distribution, relative humidity (RH) dependence, color, and vertical profile suggest that additional SOA sources and aging processes may be important. The formation of SOA in cloud and aerosol water (aqSOA) is not considered in these models even though water is an abundant medium for atmospheric chemistry and such chemistry can form dicarboxylic acids and "humic-like substances" (oligomers, high-molecular-weight compounds), i.e. compounds that do not have any gas phase sources but comprise a significant fraction of the total SOA mass. There is direct evidence from field observations and laboratory studies that organic aerosol is formed in cloud and aerosol water, contributing substantial mass to the droplet mode.This review summarizes the current knowledge on aqueous phase organic reactions and combines evidence that points to a significant role of aqSOA formation in the atmosphere. Model studies are discussed that explore the importance of aqSOA formation and suggestions for model improvements are made based on the comprehensive set of laboratory data presented here. A first comparison is made between aqSOA and gasSOA yields and mass predictions for selected conditions. These simulations suggest that aqSOA might contribute almost as much mass as gasSOA to the SOA budget, with highest contributions from biogenic emissions Correspondence to: B. Ervens (barbara.ervens@noaa.gov) of volatile organic compounds (VOC) in the presence of anthropogenic pollutants (i.e. NO x ) at high relative humidity and cloudiness. Gaps in the current understanding of aqSOA processes are discussed and further studies (laboratory, field, model) are outlined to complement current data sets.

show abstract

Section: Carbonyl Compounds (≤C 5 )mentioning

confidence: 99%

Secondary organic aerosol formation in cloud droplets and aqueous particles (aqSOA): a review of laboratory, field and model studies

2011

View full text Add to dashboard Cite

show abstract

“…Photodegradation is one of the most natural decomposition mechanisms for PCBs [4][5][6][7][8][9][10][11][12]. However, most PCB congeners do not strongly absorb the wavelength above 380 nm.…”

Section: Introductionmentioning

confidence: 99%

Photocatalysis of 2,2′,3,4,4′,5′-hexachlorobiphenyl and its intermediates using various catalytical preparing methods

Lin

Chen

Huang

et al. 2006

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…According to this proposed degradation pathway, formic acid, acetone and ammonia are the primary degradation products. In the presence of OH/O 2 , acetone can be decomposed to form acetic-, oxalic-and glycolic acid [12,13]. Since formic acid is a primary degradation product, its final concentration is much higher than that of the secondary carboxylate ions.…”

Section: Oxidative Degradation Of Ampmentioning

confidence: 99%

Possible Pathways for Oxidative Degradation of β-hydroxyl Alkanolamine for Post-combustion CO2 Capture

Wang

Jens

2014

Energy Procedia

View full text Add to dashboard Cite

Solvent degradation due to the presence of oxygen is an important issue for amine-based absorption/stripping process for postcombustion carbon dioxide capture from flue gas streams. There are still some knowledge gaps in the understanding of alkanolamine oxidation so far. To explore possible degradation mechanism of alkanolamines, oxidative degradation of aqueous -hydroxyl alkanolamine solutions without CO 2 loading was investigated in the presence of 250 kPa O 2 at 120 °C. The alkanolamines include monoethanolamine (MEA), 2-amino-2-methyl-1-propanol (AMP), 2-amino-1-propanol (APN), and 2-amino-1-butanol (ABN). The anionic oxidation products were identified by anion chromatography. A possible degradation pathway for the oxidative degradation of the investigated amines is proposed to account for the formation of the carboxylic acid products.

show abstract

Reinvestigation of the Acetone Degradation Mechanism in Dilute Aqueous Solution by the UV/H₂O₂ Process

Cited by 108 publications

References 11 publications

Secondary organic aerosol formation in cloud droplets and aqueous particles (aqSOA): a review of laboratory, field and model studies

Secondary organic aerosol formation in cloud droplets and aqueous particles (aqSOA): a review of laboratory, field and model studies

Photocatalysis of 2,2′,3,4,4′,5′-hexachlorobiphenyl and its intermediates using various catalytical preparing methods

Possible Pathways for Oxidative Degradation of β-hydroxyl Alkanolamine for Post-combustion CO2 Capture

Contact Info

Product

Resources

About

Reinvestigation of the Acetone Degradation Mechanism in Dilute Aqueous Solution by the UV/H2O2 Process

Cited by 108 publications

References 11 publications

Secondary organic aerosol formation in cloud droplets and aqueous particles (aqSOA): a review of laboratory, field and model studies

Secondary organic aerosol formation in cloud droplets and aqueous particles (aqSOA): a review of laboratory, field and model studies

Photocatalysis of 2,2′,3,4,4′,5′-hexachlorobiphenyl and its intermediates using various catalytical preparing methods

Possible Pathways for Oxidative Degradation of β-hydroxyl Alkanolamine for Post-combustion CO2 Capture

Contact Info

Product

Resources

About

Reinvestigation of the Acetone Degradation Mechanism in Dilute Aqueous Solution by the UV/H₂O₂ Process