Spectroscopic and solubility characteristics of oxidized soots

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Aerosol Science and Technology; (United States)

DOI:https://doi.org/10.1080/02786829108959518· OSTI ID:5607467

Chughtai, A R; Jassim, J A; Peterson, J H; Stedman, D H; Smith, D M ^[1]

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1. Univ. of Denver, CO (United States)

Spectroscopic and solubility studies of reaction products of soot (black carbon) with O{sub 3}, NO{sub 2}/N{sub 2}O{sub 4}, and SO{sub 2} have revealed a relationship between reactivity and product solubility and structure. A remarkably high solubility of ozonated n-hexane soot has its origin in the formation of anhydride and lactone surface structures and their subsequent hydrolysis to carboxylic acid species. Calculations indicate that the rate of surface carboxylation of 0.1-{mu}m diameter spheroidal soot particles, in the presence of 50 ppbv ozone at ambient temperature, is such that solubilization may occur within a 30-minute time frame. Measurements on ambient air aerosol samples in metropolitan Denver are consistent with these observations and demonstrate the high reactivity of soot with ozone even at very low levels in natural systems.

• OSTI ID: 5607467
• Journal Information: Aerosol Science and Technology; (United States), Vol. 15:2; ISSN 0278-6826
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
NITRITES
ATMOSPHERIC CHEMISTRY
NITROGEN DIOXIDE
OZONE
SOOT
SOLUBILITY
SULFUR DIOXIDE
OXIDATION
PARTICLE SIZE
SPECTROSCOPY
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
SIZE
SULFUR COMPOUNDS
SULFUR OXIDES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)