| 硫酸浸出电镀污泥中Zn、Cr条件及其动力学研究 |
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| 引用本文： | 姚倩,张宇峰,葛苏苏,汤传栋,张慧.硫酸浸出电镀污泥中Zn、Cr条件及其动力学研究[J].安徽农学通报,2015(7). |
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| 作者姓名： | 姚倩 张宇峰 葛苏苏 汤传栋 张慧 |
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| 作者单位： | 南京工业大学环境学院,江苏南京,211816;南京工业大学环境学院,江苏南京,211816;南京工业大学环境学院,江苏南京,211816;南京工业大学环境学院,江苏南京,211816;南京工业大学环境学院,江苏南京,211816 |
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| 摘 要： | 采用硫酸作为酸浸出剂,考察了浸出时间、酸浓度和浸出温度对电镀污泥中重金属Zn、Cr浸出效果的影响,并运用Avrami方程拟合Zn、Cr的浸出动力学。结果表明:硫酸浸出Zn、Cr的最适浸出时间、酸浓度、温度均为4h、3mol/L、20℃。Zn、Cr的浸出过程均可用Avrami方程进行很好的拟合,其浸出反应的表观活化能分别为3.58和3.06k J/mol,即两者的浸出过程均是扩散控制的,为工业规模的硫酸浸出电镀污泥中Zn、Cr提供理论参考。
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| 关 键 词： | 硫酸 重金属 最佳浸出条件 Avrami方程 浸出动力学 |
Study on the Conditions and Kinetics on Sulfuric Acid Leaching Zinc and Chromium from Electro-plating Sludge |
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| Abstract: | This article,using sulphuric acid as acid leaching agent,investigates the effects of leaching time, acid concentration and leaching temperature on the leaching effect of zinc and chromium which are heavy metals from electroplating sludge,and uses Avrami equation to fit the leaching kinetics of zinc and chromi?um. The results showed that:both the optimum leaching time,acid concentration and temperature of sulph?uric acid leaching zinc and chromium are 4h,3mol/L and 20°C. Avrami equation could be used to fit both the leaching process of zinc and chromium very well,and the apparent activation energy of the leaching re?action are 3.58 and 3.06kJ/mol respectively,that is,both the leaching process are controlled by diffusion, which provides the theory reference for the sulfuric acid leaching zinc and chromium from electroplating sludge on an industrial scale. |
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| Keywords: | Sulphuric acid Heavy metals The optimum leaching conditions Avrami equation Leaching kinetics |
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