本研究將以鋅板作為犧牲金屬，透過金屬置換從水溶液中移除並回收銅和錫離子。在批次反應器中探討鋅板表面積、溶液pH值及溶液溫度等操作參數對金屬置換的影響。使用ICP-OES測量金屬置換的移除效率並進行動力學分析，再以XRD及FE-SEM分析金屬置換後沉積物的組成成分及形貌。
研究結果表明，以鋅板進行單一金屬離子或共同金屬離子置換反應遵守擬一階反應動力模型，且銅和錫離子的移除效率皆隨著鋅板面積、溶液pH值及溶液溫度的增加而提高。單一金屬離子或共同金屬離子置換的活化能值皆表明反應受擴散控制。根據XRD分析，在單一金屬離子置換後的鋅板沉積物上觀察到金屬銅和錫的生成；在共同金屬離子置換後的鋅板沉積物上額外觀察到CuSn、Cu3Sn及Cu6Sn5等晶相的生成。銅錫合金的形成可以促進共同金屬離子置換的去除效率，因為合金中的金屬原子比其以單金屬形式更穩定。

In this study, zinc plates were used as sacrificing metal to remove and recover Cu2+ and Sn2+ from aqueous solution by cementation. The effect of the surface area of zinc plates, solution pH and solution temperature were investigated in a batch reactor. The removal efficiency was determined by inductively coupled plasma optical emission spectrometry (ICP-OES) to establish kinetic analysis. X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM) were used to examine the composition and morphology of the cemented deposits after cementation.
The results demonstrated that single metal ion or simultaneous metal ions cementation of Cu2+ and Sn2+ with zinc plates followed pseudo-first-order kinetics model. The removal efficiency of both Cu2+ and Sn2+ increased with an increase in the surface area of zinc plates, solution pH and solution temperature. The activation energy values for single metal ion or simultaneous metal ions cementation indicated reactions were controlled by diffusion. XRD analysis revealed the formation of metallic copper and tin on the zinc plates after single metal ion cementation; while crystal phases of CuSn, Cu3Sn, and Cu6Sn5 were additionally observed on zinc plate after simultaneous metal ions cementation. The formation of Cu-Sn alloy was found to enhance the removal efficiency of simultaneous metal ions cementation, as the metallic atoms are more stable in the alloy form compared to their individual metallic forms.

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