Study on thermodynamic model of arsenic removal from oxidative acid leaching

Journal of Materials Research and Technology

Shan Cao¹  Zhihao Rong²  Xincun Tang²  Yang Wang²  Xiong Fang²  Pin Deng³ 

[1] Corresponding authors.;College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China;Hunan Research Institute of Nonferrous Metals, Changsha, 410100, China;

关键词: Arsenic-bearing waste residues;    Oxidation-acid leaching;    Arsenic removal model;    Thermodynamic calculation;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this paper, we propose a new strategy to remove arsenic from arsenic-containing waste residues by oxidation-acid leaching. The experimental results show the example is effective for different types of arsenic-containing waste residues. Chemical thermodynamic calculations provide guidance for leaching of oxidizing acids, while theoretical calculations and experimental data have successfully proven the shielding layer of AsH3. The acid leaching characteristics of different types of arsenate were analyzed, a multi-metal ion equilibrium system in acid leaching was established, and a model of arsenic removal by oxidizing acid was established. An in-depth understanding of the relationship between the amount of acid required to leaching different arsenic-containing waste residues and the pH of the leachate provides new perspectives on how to efficiently collect hazardous materials from industrial waste residues.

【 授权许可】

Unknown