Química Nova | |
Optimization of the use of carbon paste electrodes (CPE) for electrochemical study of the chalcopyrite | |
Daniela G. Horta1  Denise Bevilaqua1  Heloísa A. Acciari1  Oswaldo Garcia Júnior1  Assis V. Benedetti1  | |
[1] ,Universidade Estadual Paulista Instituto de Química Araraquara SP ,Brasil | |
关键词: carbon paste electrodes (CPE); chalcopyrite; leaching; | |
DOI : 10.1590/S0100-40422009000700010 | |
来源: SciELO | |
【 摘 要 】
The use of carbon paste electrodes (CPE) of mineral sulfides can be useful for electrochemical studies to overcome problems by using massive ones. Using CPE-chalcopyrite some variables were electrochemically evaluated. These variables were: (i) the atmosphere of preparation (air or argon) of CPE and elapsed time till its use; (ii) scan rate for voltammetric measurements and (iii) chalcopyrite concentration in the CPE. Based on cyclic voltammetry, open-circuit potential and electrochemical impedance results the recommendations are: oxygen-free atmosphere to prepare and kept the CPE until around two ours, scan rates from 10 to 40 mV s-1, and chalcopyrite concentrations > 20%.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO202103040062916ZK.pdf | 567KB | download |