Organics, soot, and ambient sulfate

Conference · Wed Sep 01 00:00:00 EDT 1982

OSTI ID:7074822

Novakov, T

Evidence is presented for significant local sulfate formation, the existence of a chemical link between ambient sulfate and organic particulate material is postulated, and a new SO/sub 2/ oxidation process by a reaction between organic products of incomplete combustion and SO/sub 2/ is described. Specifically, results of field studies on the relationship among sulfate, SO/sub 2/, and carbonaceous particles, speciation of sulfate and nitrogenous species, and laboratory results on certain aspects of SO/sub 2/ oxidation are presented. It is concluded that in highly polluted atmospheres, large concentrations of ambient sulfate can be produced by conversion of locally emitted SO/sub 2/ by a process that is largely independent of SO/sub 2/ but proportional to soot concentration. Ambient sulfate from many locations is found as anomalous ammonium sulfate where charged organic nitrogen complexes substitute for ammonium ions. Such sulfate is found when the aerosol is rich in organic constituents. The reaction between pyrolysis products of hydrocarbon fuels and SO/sub 2/ is an efficient mechanism for sulfate ion formation. This reaction is strongly dependent on combustion conditions.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7074822
• Report Number(s): LBL-14919; CONF-821083-1; ON: DE83001544
• Resource Relation: Conference: EPRI workshop on research priorities and criteria to establish factors which govern precipitation chemistry, Lake Placid, NY, USA, 10 Oct 1982
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
PARTICULATES
ATMOSPHERIC CHEMISTRY
SULFATES
SULFUR DIOXIDE
AEROSOLS
AIR POLLUTION
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
ORGANIC COMPOUNDS
OXIDATION
PYROLYSIS
SOOT
CHALCOGENIDES
CHEMISTRY
COLLOIDS
DECOMPOSITION
DISPERSIONS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION
SOLS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
500100* - Environment
Atmospheric- Basic Studies- (-1989)