Free-Radical Reactions in Cloudwater: The Role of Transition Metals in Hydrogen Peroxide Production and Destruction

Conference · Mon Jul 15 04:00:00 EDT 1991

OSTI ID:5586813

Weinstein-Lloyd, Judith B. ^[1]; Schwartz, Stephen E. ^[2]

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1. State Univ. of New York (SUNY), Old Westbury, NY (United States)
2. Brookhaven National Laboratory (BNL), Upton, NY (United States)

Cloudwater hydrogen peroxide is a principal oxidant for dissolved S(IV). Low-intensity cobalt-60 radiolysis permits the study of free-radical reactions producing H₂O₂ in aqueous solutions under conditions characteristic of the ambient atmosphere. Results using this technique have confirmed model predictions that H₂O₂ production is frequently the major fate of O₂(-I) radicals. However, dissolved iron can significantly decrease the apparent yield of H₂O₂, principally because of destruction of H₂O₂ by Fe(II). In spite of its greater efficiency in catalyzing the production of HO₂ from O₂(-I), faster oxidation reactions for Cu(I) and the generally lower atmospheric abundance of copper suggest that it will not be as effective as iron on atmospheric H₂O₂.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); National Science Foundation (NSF)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5586813
• Report Number(s): BNL--46114; CONF-9107104--6; ON: DE91013334; CNN: ATM-8808480; ATM-8911296
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
ACID RAIN
ATMOSPHERIC CHEMISTRY
ATMOSPHERIC PRECIPITATIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CLOUDS
COBALT 60
COBALT ISOTOPES
COPPER
DECOMPOSITION
DROPLETS
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IRON
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KINETICS
METALS
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXIDATION
OXYGEN COMPOUNDS
OZONE
PARTICLES
PEROXIDES
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOISOTOPES
RADIOLYSIS
RAIN
REACTION KINETICS
SULFUR
TRANSITION ELEMENTS
YEARS LIVING RADIOISOT