| 铁屑置换沉淀海绵铜动力学研究 |
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| 引用本文： | 江丽,李义连,张富有.铁屑置换沉淀海绵铜动力学研究[J].环境科学与技术,2009,32(7). |
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| 作者姓名： | 江丽 李义连 张富有 |
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| 作者单位： | 中国地质大学环境学院,湖北,武汉,430074 |
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| 摘 要： | 从动力学角度研究了铁屑置换沉淀海绵铜的化学反应机理,探讨了溶液pH,Cu2+初始浓度,振荡强度和温度等因素对铜置换率的影响及动力学模型。通过测定不同温度条件下的表观反应速率常数(k);求得置换反应活化能为16.21kJ/mol。试验结果表明,置换反应的所有动力学数据服从一级反应速率规律,置换过程符合扩散控制机理。
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| 关 键 词： | 铁屑 置换 海绵铜 动力学 |
Kinetic Study on Cementation of Copper from Solution Using Iron Filings |
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| JIANG Li,LI Yi-lian,ZHANG Fu-you.Kinetic Study on Cementation of Copper from Solution Using Iron Filings[J].Environmental Science and Technology,2009,32(7). |
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| Authors: | JIANG Li LI Yi-lian ZHANG Fu-you |
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| Institution: | School of Environment;China University of Geosciences;Wuhan 430074;China |
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| Abstract: | Chemical reaction mechanism of cementation of copper by iron filings was studied from aspect of kinetics.Effects of pH of solution,initial concentration of Cu2+,oscillation intensity and temperature on rate of replacement of copper and kinetic model were discussed.Apparent activation energy of reaction estimated was 16.21kJ/mol by measuring reaction-rate constant under different temperatures.The low value indicated the copper precipitation process was controlled by diffusion through mass transfer boundary l... |
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| Keywords: | iron filings replacement sponge copper kinetics |
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