自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
英文版编委
自然科学版 英文版
英文版首届青年编委

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(英文版)

Journal of Central South University

Vol. 27    No. 5    May 2020

[PDF Download]    [Flash Online]

    

Catalytic effect of silver-bearing solid waste on chalcopyrite bioleaching: A kinetic study
LIAO Rui(廖蕤)1, 2, WANG Xing-xing(王星星)1, 2, YANG Bao-jun(杨宝军)1, 2, HONG Mao-xing(洪茂鑫)1, 2, ZHAO Hong-bo(赵红波)1, 2, WANG Jun(王军)1, 2, QIU Guan-zhou(邱冠周)1, 2

1. Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University,Changsha 410083, China;
2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:Silver ion can be useful in improving chalcopyrite bioleaching efficiency. In this work, leaching kinetics of this process was investigated using silver-bearing solid waste under different chalcopyrite/solid waste ratios. Bioleaching behavior indicates that silver-bearing solid waste can enhance the bioleaching process, and the redox potential is much higher than the proposed appropriate range (380-480 mV vs Ag/AgCl) with the solid waste added. There is a positive correlation between temperature and copper extraction rate. The kinetics data fit well with the shrinking-core model. Under these leaching conditions, the bioleaching of chalcopyrite is controlled by internal diffusion with calculated apparent activation energy (Ea) of 28.24 kJ/mol. This work is possible benificial to promote the industrial application of silver catalyst in leaching of chalcopyrite.

 

Key words: chalcopyrite; silver-bearing solid waste; bioleaching; kinetics

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号