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Science 14 August 1987:
Vol. 237. no. 4816, pp. 756 - 758
DOI: 10.1126/science.237.4816.756
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Articles

Disulfate Ion as an Intermediate to Sulfuric Acid in Acid Rain Formation

S. G. CHANG 1, D. LITTLEJOHN 1, and K. Y. Hu 1

1 Applied Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720.

The oxidation of the bisulfite ion by dissolved oxygen to produce sulfate ion involves the formation of a previously undetected intermediate. This intermediate has a fairly strong Raman band at 1090 wave numbers and a weak Raman band at 740 wave numbers, both of which are probably due to sulfur-oxygen stretches. The intermediate is proposed to be the disulfate ion S2O72-, which hydrolyzes into H+ and either SO42- or HSO42- with a half-life of about 52 seconds at 25°C.

Submitted on May 29, 1987
Accepted on June 22, 1987

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Science. ISSN 0036-8075 (print), 1095-9203 (online)