Abstract A novel process for recovery of tellurium (Te) from alkaline solution by cyclone electrowinning was proposed. The electrochemical behavior of Te in alkaline media was determined by cyclic voltammetry and linear sweep voltammetry measurements. It indicated that TeO32− ion was first reduced to Te(s), then to Te22− ion. It has been identified that Te electrodeposition was diffusion and charge transfer controlled irreversible reaction. The influences of Te concentration, NaOH concentration, flow rate of the electrolyte, current density and cathode material on Te cyclone electrowinning were systematically investigated. The current efficiency of 95.25% and energy consumption of 1737.59 kWh·t−1 was achieved from the electrolytes containing 100 g·L−1 Te and 100 g·L−1 NaOH at 300 L·h−1 flow rate of the electrolyte and 100 A·m−2 current density, 316 L stainless steel cathode. Te deposits with a purity of 99.94% was obtained.

中文翻译：

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旋风电积法从碱性溶液中电沉积碲

摘要 提出了一种旋风电积从碱性溶液中回收碲（Te）的新工艺。Te在碱性介质中的电化学行为通过循环伏安法和线性扫描伏安法测量确定。这表明 TeO32- 离子首先被还原为 Te(s)，然后是 Te22- 离子。已经确定 Te 电沉积是扩散和电荷转移控制的不可逆反应。系统研究了Te浓度、NaOH浓度、电解液流量、电流密度和阴极材料对Te旋风电积的影响。含有100 g·L-1 Te和100 g·L-1 NaOH的电解液在300 L·h-1的电解液流速下获得了95.25%的电流效率和1737.59 kWh·t-1的能耗。 100 A·m-2电流密度，316 L 不锈钢阴极。获得纯度为99.94%的Te沉积物。