Reduction of Fe(III) with sulfite in natural waters

F. J. Millero, M. Gonzalez-Davila, J. M. Santana-Casiano

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39 Scopus citations


Measurements of the rates of reduction of nanomolar levels of Fe(III) with sulfite (without O2) have been determined in NaCl and seawater solutions as a function of temperature (0° to 40°C), pH (2 to 6.8), ionic strength (I = 0.1 to 6 M), and composition (Na+, Mg2+, Ca2+, F-, Cl-, Br-, HCO-3, SO42-). The overall rate constant (k, M-1 min-1) for the reaction, Fe(III) + S(IV) k products, is given by d[Fe(III)]/dt = -k[Fe(III)] [S(IV)]. The reaction was found to be first order with respect to Fe(III) and S(IV). The rate constants as a function of pH increased from a pH = 2 to 4 and decreased at higher pH. -from Authors

Original languageEnglish (US)
Pages (from-to)7235-7244
Number of pages10
JournalJournal of Geophysical Research
Issue numberD4
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology


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