OXIDATION OF COPPER(I) IN SEAWATER

被引：66

作者：

SHARMA, VK ^{[1
]}

MILLERO, FJ ^{[1
]}

机构：

[1] UNIV MIAMI, ROSENSTIEL SCH MARINE & ATMOSPHER SCI, 4600 RICKENBACKER CAUSEWAY, MIAMI, FL 33149 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1988年 / 22卷 / 07期

关键词：

CHLORINE COMPOUNDS - ENVIRONMENTAL TESTING - SEAWATER;

D O I：

10.1021/es00172a004

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.degree. C), and salinity (5-44). The overall rate constant k (kg mol-1 min-1) d[Cu(I)]/dt = -k[Cu(I)][O2] has been fitted to log k = 10.73 + 0.23pH-2372/T-3.33I1/2 + 1.45I 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 HCO3-. Possible causes of these effects are discussed.

引用

页码：768 / 771

页数：4

共 17 条

[1] STABILITY OF METAL HALIDE COMPLEXES IN AQUEOUS SOLUTION .7. CHLORIDE COMPLEXES OF COPPER(I) [J].