Oxidation of Copper(I) in Seawater

Virender K. Sharma, Frank J. Millero

Research output: Contribution to journalArticle

64 Scopus citations

Abstract

The oxidation of Cu(I) in air-saturated solutions of seawater has been measured as a function of pH (5.3-8.6), temperature (5-45 °C), and salinity (5-44). The overall rate constant k (kg mol-1 min-1) [formula omitted] has been fitted to [formula omitted] with a standard error of 0.08 in log k. The energy of activation was found to be 45.6 ± 1.7 kJ mol-1. The strong chloride dependence of the rates has been attributed to the effect of temperature and ionic strength on the oxidation of Cu+ and CuCl0 species. At a given Cl- concentration, the rates of oxidation in seawater are lower than in NaCl or NaCl-NaClO4 mixtures. These differences in seawater are due to a decrease in the rates due to Mg2+ and Ca2+ and the increase in the rates due to HCO-3. Possible causes of these effects are discussed.

Original languageEnglish (US)
Pages (from-to)768-771
Number of pages4
JournalEnvironmental Science and Technology
Volume22
Issue number7
DOIs
StatePublished - Jul 1 1988

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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