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

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

Research output: Contribution to journalArticle

63 Citations (Scopus)

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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Seawater
Metals
seawater
oxidation
metal
metals
Black Sea
Sulfides
transition element
Ions
trace metal
rate
effect
sulfides
transition metals
sulfide
ion
ions

ASJC Scopus subject areas

  • Medicine(all)
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Vazquez G., F., Jia-Zhong Zhang, Z., & Millero, F. J. (1989). Effect of metals on the rate of the oxidation of H2S in seawater. Geophysical Research Letters, 16(12), 1363-1366.

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

Vazquez G., F, Jia-Zhong Zhang, Z & Millero, FJ 1989, 'Effect of metals on the rate of the oxidation of H2S in seawater', Geophysical Research Letters, vol. 16, no. 12, pp. 1363-1366.
Vazquez G. F, Jia-Zhong Zhang Z, Millero FJ. Effect of metals on the rate of the oxidation of H2S in seawater. Geophysical Research Letters. 1989;16(12):1363-1366.
Vazquez G., F. ; Jia-Zhong Zhang, Zhang ; Millero, Frank J. / Effect of metals on the rate of the oxidation of H2S in seawater. In: Geophysical Research Letters. 1989 ; Vol. 16, No. 12. pp. 1363-1366.
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AB - 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

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