Optimization of Process Parameters and Kinetics Analysis of Cd Removal in ZnSO4 Production

Processes

Xiaoling Ren¹  Jiushuai Deng¹  Xinqian Shu¹  Sixue Qin¹  Haisheng Li²  Peng Li³ 

[1] China University of Mining and Technology-Beijing, Beijing 100083, China;Lingwu Hengye Nonferrous Metal Smelting Co., Ltd., Yinchuan 751400, Ningxia, China;Ningxia Survey and Monitor Institute of Land and Resources, Yinchuan 750002, Ningxia, China;

关键词: zinc sulfate;    Cd removal;    response surface;    kinetics;   

DOI  :  10.3390/pr9081437

来源: DOAJ

【 摘 要 】

In order to optimize the process parameters of Cd removal in the ZnSO₄ production process and study the mechanism of Cd removal reaction, the response surface methodology was used to arrange Cd removal experiments and analyze the optimal production conditions, and the mechanism of Cd removal was studied using kinetics. The results show that the optimal process conditions for Cd removal are as follows: reaction temperature 55 °C, reaction time 13.43 min, and the zinc powder dosage should be 2.14 times that of Cd; the main effects of the three variables from large to small are zinc powder dosage, reaction temperature and reaction time; Cd removal is a second-order reaction, and the activation energy of the reaction is 29.6986 kJ/mol, so the reaction conforms to the diffusion control mechanism.

【 授权许可】

Unknown