Fog chamber studies of soot-catalyzed SO/sub 2/ oxidation

Conference · Sat Nov 01 00:00:00 EST 1980

OSTI ID:6414067

Benner, W H; Brodzinsky, R; Novakov, T

The oxidation of SO/sub 2/ by wet soot particles has been suggested as an important reaction pathway for the production of particulate sulfate in the ambient atmosphere. We studied this reaction in two systems. The first consisted of a flask-type reaction study. H/sub 2/SO/sub 3/ (diluted final concentration between 7 x 10/sup -8/ M and 1 x 10/sup -3/ M) was added to a flask containing several hundred milliliters of a constantly stirred aqueous suspension of Nuchar-SN in which the soot particle concentration was between 0.002 and 0.32% w/v carbon. For H/sub 2/SO/sub 3/ concentrations less than 10/sup -4/ M, sulfite and sulfate were determined by ion chromatography. Above 10/sup -4/ M H/sub 2/SO/sub 3/, sulfite concentration was determined by iodometric titrations while sulfate was measured turbidometrically only in selected runs. The pH of a soot suspension was controlled by the buffering capacity of the SO/sub 2/.H/sub 2/O, HSO/sub 3//sup -/, SO/sub 3//sup =/ system.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6414067
• Report Number(s): LBL-11881; CONF-8005149-3; ON: DE81023242
• Resource Relation: Conference: Physics and chemistry of energy - related atmospheric pollution, Harpers Ferry, WV, USA, 28 May 1980
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
SOOT
CATALYTIC EFFECTS
SULFUR DIOXIDE
ATMOSPHERIC CHEMISTRY
AIR POLLUTION
CATALYSTS
OXIDATION
SULFATES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
OXIDES
OXYGEN COMPOUNDS
POLLUTION
SULFUR COMPOUNDS
SULFUR OXIDES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)