Measurement of oxidation rate of sulfite in rain water in Yokohama, Japan
In recent years, the influences of acid rain such as the acidification of lake water, on bio-system by the heavy metals from effluent of soils with acid rain and also on the structural materials of buildings are seriously discussed. Sulfur and nitrogen that are contained in fossil fuels are released into the atmosphere by the fuel combustion as their oxides dissolve in rain drops as sulfite and nitrous ions, where they are further oxidized into sulfate and nitrate ions These ions lower the pH of rain water resulting so-called acid rain. Therefore, it is important to accurately determine these ions in rain water for the investigation of reality of acid rain. However, it is not easy to accurately determine these ions, especially for sulfite ions in rain water, since they are quickly oxidized by the catalytic action of metallic ions such as ferric and manganous ions. And light, temperature, pH of solution and also species and concentrations of dissolved metallic ions as catalysts, must be influential factors for the rate of oxidation of sulfite ions. In this paper, first, the rate of oxidation of sulfite ion in the test solutions by the catalytic reactions of metallic ions was examined, since the metallic ions is most influential in the oxidation of sulfite ion, and then the relations between the rate of oxidation of sulfite ion and the metallic ions were investigated for rain samples. The contribution of hydrogen ion that was produced by the oxidation of sulfite ion to sulfate was also examined for the change of pH values of rain water.
- Research Organization:
- Dept. of Applied Chemistry, Keio Univ., Hiyoshi, Yokohama 223
- OSTI ID:
- 5579954
- Report Number(s):
- CONF-860425-
- Journal Information:
- Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 31:2; Conference: 191. American Chemical Society national meeting, New York, NY, USA, 13 Apr 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACID RAIN
ATMOSPHERIC CHEMISTRY
JAPAN
SULFITES
CHEMICAL REACTION KINETICS
OXIDATION
CATALYSIS
METALS
NITRATES
PH VALUE
RAIN WATER
SULFATES
ASIA
ATMOSPHERIC PRECIPITATIONS
CHEMICAL REACTIONS
CHEMISTRY
ELEMENTS
HYDROGEN COMPOUNDS
KINETICS
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
RAIN
REACTION KINETICS
SULFUR COMPOUNDS
WATER
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)