【摘 要】
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The O3/O2 mixture gas was input into the cobalt solution to study the cobalt oxidation with ozone.The potentiometer was used to determine the end of the oxi
【机 构】
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School of Metallurgical Science & Engineering, Central South University, Changsha 410083,China
【出 处】
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第五届国际湿法冶金学术会议(5th International Conference on Hydrometallurg
论文部分内容阅读
The O3/O2 mixture gas was input into the cobalt solution to study the cobalt oxidation with ozone.The potentiometer was used to determine the end of the oxidation reaction and the sodium hydroxide of was added to keep the constant pH.The experiments were conducted at the concentration of cobalt of 0.5,1,2 and 4g/L.The results showed that the cobalt oxidation rate was independent of the concentration of the cobalt.The oxidation reaction was observed to follow the first order rate with respect to the ozone partial pressure of the O3/O2 mixture gas and to be promoted considerably by vigorous agitation.Also, at high pH, the oxidation reaction occurred easily and quickly.The oxidation rote was slow down when the temperature was high.The X-ray diffraction(XRD) showed CoOOH was produced by ozone oxidation.
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