Kinetics of oxidation-precipitation of cobalt(Ⅱ) from solution by ozone

来源期刊：中国有色金属学报(英文版)2010年增刊第1期

论文作者：田庆华 郭学益 易宇 李治海

文章页码：42 - 45

Key words：ozone; diffusion control; cobalt chloride; oxidation; kinetics

Abstract: In order to precipitate cobalt(Ⅱ) in cobalt chloride solution, a novel method using ozone as the precipitant for its strong oxidability was proposed. The results show that the precipitation reaction is diffusion-controlled. The main factors affecting the oxidation rate such as the stirring speed, solution temperature, ozone partial pressure, initial concentration and flow rate were investigated. The kinetics equation of each condition was established. The results indicate that the oxidation rate is independent of the initial concentration or solution temperature. The oxidation rate increases obviously with increasing the stirring speed. The linear relationship between ozone partial pressure or flow rate and oxidation rate is found.

基金信息：Science and Technology Planning Project of Hunan Province, China