Selective and Efficient Electrochemical Recovery of Dilute Copper and Tellurium from Acidic Chloride Solutions,ACS Sustainable Chemistry & Engineering

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Selective and Efficient Electrochemical Recovery of Dilute Copper and Tellurium from Acidic Chloride Solutions
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-09-13 00:00:00 , DOI: 10.1021/acssuschemeng.8b03150
Wei Jin _{1,

2} , Meiqing Hu ₁ , Jiugang Hu ₃

Affiliation

Sustainable recovery of tellurium (Te) from large-scale wastewater is of great importance to offer stable supply of this strategic element. However, the concentration of tellurium is very low, and there is usually coexisting metallic ion of copper. In this study, a novel selective and efficient electrochemical extraction of Te and Cu from HCl solutions was first reported with stainless steel electrode. The interfacial growth behavior of electrodeposition was measured by the emerging in situ synchrotron radiation dynamic X-ray images. A turbulent reactor was employed for the stepwise electrodeposition, and nanometric powder was produced owing to the largely improved mass transport. High-purity 93.2% tellurium and 98.3% copper were selectively and efficiently recovered with the current efficiency of ∼85% and extraction ratio of ∼95%. This mass transport assisted method may be explored as a promising solution to overcome the limitation of present metal recycling and water purification.

中文翻译：

从酸性氯化物溶液中选择性和高效地电化学回收稀铜和碲

从大规模废水中可持续回收碲（Te）对于提供稳定的这一战略要素供应至关重要。但是，碲的浓度非常低，并且通常存在铜的金属离子共存。在这项研究中，首次报道了用不锈钢电极从HCl溶液中选择性和有效地电化学提取Te和Cu的新方法。电沉积的界面生长行为是通过新兴的原位同步加速器辐射动态X射线图像测量的。湍流反应器用于逐步电沉积，由于质量传输大大改善，因此产生了纳米级粉末。高选择性地回收了93.2％的碲和98.3％的铜，电流效率约为85％，萃取率约为95％。

更新日期：2018-09-13

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