Effect of metals on the rate of the oxidation of H2S in seawater

F. Vazquez G., Zhang Jia-Zhong Zhang, Frank J Millero

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Abstract

Recent measurements on the oxidation of H2S in the Black Sea yielded rates that were ten times faster than expected. To determine if this increase was due to trace metals, measurements have been made on the oxidation of H2S in seawater with added transition metals. Below a concentration level of 100 nM, none of the metals except Fe2+ affect the rate of oxidation. At higher concentrations and rates increase for all the metals except Zn2+. The increase in the rates followed the order Fe2+>Pb2+>Cu2+>Fe3+>Cd2+>Ni2+>Co2+>Mn2+. The increase in the rates below sulfide precipitation appears to be related to the formation of MHS+ ion pairs that have a higher rate of oxidation than HS-. -from Authors

Original languageEnglish (US)
Pages (from-to)1363-1366
Number of pages4
JournalGeophysical Research Letters
Volume16
Issue number12
StatePublished - 1989

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Effect of metals on the rate of the oxidation of H2S in seawater. / Vazquez G., F.; Jia-Zhong Zhang, Zhang; Millero, Frank J.

In: Geophysical Research Letters, Vol. 16, No. 12, 1989, p. 1363-1366.

Research output: Contribution to journalArticle