(1. 东北大学 冶金学院，沈阳 110819；
2. 中国科学院 绿色过程与工程重点实验室，北京 100190；
3. 江南大学 化学与材料工程学院 合成与生物胶体教育部重点实验室，无锡 214122)
摘 要: 采用电沉积从硫酸水溶液中回收硒和铋。利用线性扫描伏安法(LSV)分析对比了两者的还原行为，并利用恒电位法进行沉积行为研究，采用SEM、EDS和XRD对产物进行了分析。结果表明：硒和铋共沉积行为是准可逆的，反应物扩散是反应的控制环节，传质过程对回收过程有重要影响。当搅拌速率700 r/min时，硒、铋的回收率可分别达到84.23%、62.66%；加入球形添加剂2,2′-联吡啶和亚铁氰化钾，可得到球形的硒和铋颗粒。
关键字: 硒；铋；电沉积；传质控制；回收；球形颗粒
（1. School of Metallurgy, Northeastern University, Shenyang 110819, China;
2. Key Laboratory of Green Processes and Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China）
Abstract:Electrodeposition was used to recover the valuable metals, selenium and bismuth from the sulfuric acid solution. Linear sweep voltammetry (LSV) was employed to determine the reduction behavior of selenium and bismuth, while the potentiostatic deposition was used to study the electrodeposition behavior by using SEM, EDS and XRD for product analysis. The results show that the co-deposition of selenium and bismuth is quasi-reversible reaction, in which the reactant diffusion is the rate-limiting step. The mass transportation possesses an important impact towards the recovery performance. The maximum recovery of Se and Bi reach 84.23%, 62.66%, respectively, at the stirring speed of 700 r/min. Besides, the addition of 2, 2’-bipyridine and potassium ferrocyanide can lead to the spherical particles of selenium and bismuth product.
Key words: selenium; bismuth; electrodeposition; mass transfer-controlled; recovery; spherical particles
