采用阴极电沉积去除废水中重金属Cd²⁺，并进行过程强化提高Cd²⁺去除率，解决废水中重金属Cd²⁺永久残留问题，同时回收Cd资源。结果表明，电沉积去除废水中Cd²⁺过程受扩散控制，磁力搅拌强化电沉积使Cd²⁺去除率达85.4%。在相同条件下，超重力强化使Cd²⁺去除率达99.4%，比磁力搅拌电沉积提高了14%。动力学研究表明，两种强化电沉积去除废水中Cd²⁺过程均符合表观一级反应动力学规律。SEM和XRD分析表明，两种强化获得的沉积物均由Cd和Cd （OH）₂组成，超重力使其形貌由不稳定生长的枝晶结构变为稳定生长的片状结构。

Cd²⁺ in wastewater is removed by cathode electrodeposition method,which is intensified to enhance the removal rate,solve the Cd²⁺ permanent residue problem,and recover Cd resources.The results show that the removal process of Cd²⁺ from wastewater by electrodeposition is controlled by the diffusion,and the removal efficiency of Cd²⁺ reaches 85.4% through the electrodeposition intensified by magnetic stirring.Under the same conditions,the removal efficiency of Cd²⁺ can reach 99.4% by high-gravity intensified electrodeposition,and 14% higher than that by magnetic stirring intensified electrodeposition.It is shown through kinetic studies that both intensified electrodeposition processes for removing Cd²⁺ from wastewater conform with the apparent first-order reaction kinetics law.SEM and XRD analysis show that the deposits are composed of Cd and Cd(OH)₂ under both intensification processes.High-gravity can make the deposits morphology change from unstably grown dendrite structure to stably grown flaky structure.

吴彩彩(1995-),女,硕士研究生,研究方向为电沉积处理重金属废水及其过程强化,Wucaicai-0814@163.com;高璟(1982-),女,博士,教授,研究方向为超重力强化电化学反应过程及其用于废水清洁化治理,通讯联系人,zbgaojing@163.com。