武汉工程大学学报2012，Vol.34Issue(4)：27-31,5.DOI:10.3969/j.issn.1674-2869.2012.04.007
冶炼废水处理污泥中银浸出过程的反应动力学
On dynamics of leaching silver by ammonium thiocyante in treated sludge from nonferrous metal smelting waste water
闫茂群 1陈云 1李文婕 1关洪亮 1李庆新 1余训民1
作者信息
- 1. 武汉工程大学环境与城市建设学院,湖北武汉430074
- 折叠
摘要
Abstract
The experiment was carried out for leaching silver by using ammonium thiocyante as leaching agent, and the effect of leaching agent concentration, reaction time, temperature, the dosage of oxidant and liquid-to-solid ratio on leaching efficiency was discussed. The optimal technique route and parameter was proposed. The orthogonal test, single factor optimized test and magnification test showed that when ammonium thiocyante was 95 kg/t, the dosage of manganese dioxide was 6.8 kg/t, leaching temperature was 25 t, liquid-to-solid ratio was 2.5:1 and pH was 2, the total rate of silver leaching by twice was up to 95%. The dynamics mechanism of silver leaching was also investigated, and it was found that the leaching reaction order of ammonium thiocyante was 0.5, activation energy was 12.574 kJ · mol-1, the reaction rate constant was k=1.883 e-12574/RT.关键词
冶炼废水/污泥/银/浸出/硫氰酸铵/动力学Key words
smelting waste water/ sludge/ silver/ leaching/ ammonium thiocyanate/ dynamics分类
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闫茂群,陈云,李文婕,关洪亮,李庆新,余训民..冶炼废水处理污泥中银浸出过程的反应动力学[J].武汉工程大学学报,2012,34(4):27-31,5.
