Removal of Cd2+ from wastewater by high-gravity intensified electrodeposition
WU Cai-cai, GAO Jing, LIU You-zhi, ZHONG He-peng, FAN Yi-fan
Shanxi Provincial Key Laboratory of Higee-Oriented Chemical Engineering, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
Abstract: 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, 高璟, 刘有智, 钟鹤鹏, 范一帆. 超重力强化电沉积去除废水中镉离子[J]. 现代化工, 2022, 42(3): 159-163.
WU Cai-cai, GAO Jing, LIU You-zhi, ZHONG He-peng, FAN Yi-fan. Removal of Cd2+ from wastewater by high-gravity intensified electrodeposition. Modern Chemical Industry, 2022, 42(3): 159-163.
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