Efficient recovery of Au(III) from acidic chloride solutions by microwave-induced carbonized persimmon tannin adsorbent

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Yi, Qingping^1,2 ; Hu, Xiaokang^1 ; Chen, Han^1 ; Zhu, Deyan^1 ; Guo, Miaomiao^2

Bioengineering College, Jinchu University of Technology, Jingmen

448000, China^1

Jingmen GEM New Materials Co. Ltd., Jingmen

448124, China^2

关键词: Acidic chloride solution;    Adsorption behavior;    Adsorption capacities;    Adsorption mechanism;    Elution experiments;    Hydrochloric acid medium;    Microwave-induced;    Selective recovery;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022103/pdf
DOI  :  10.1088/1755-1315/170/2/022103

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A new adsorbent has been developed by microwave-induced carbonization with persimmon tannin, and its adsorption behaviors and mechanism towards Au(III) were studied in hydrochloric acid medium. The adsorption of Au(III) was found to be dependent on acidity, temperature, reaction time. The maximum adsorption capacity was above 700 mg g-1. The selective recovery of Au(III) by adsorption-elution experiment was tested to be effective, and the loaded metals can be easily desorbed by acidic thiourea. Characterized by FTIR and SEM, the adsorption mechanisms of Au(III) was proposed to be redox-reduction.