An In Situ Characterization for the Bioleaching Process of Natural Pyrite Using Electrochemical Noise Technique

Guo Bao Chen; Hong Ying Yang; Hai Jun Li

doi:10.4028/www.scientific.net/AMR.1130.268

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1130An In Situ Characterization for the Bioleaching...

An In Situ Characterization for the Bioleaching Process of Natural Pyrite Using Electrochemical Noise Technique

Abstract:

An in situ characterization has been carried out for several active systems (sulfuric acid, ferric iron, 9k medium and bioleaching solutions) to investigate the bioleaching process of natural pyrite using electrochemical noise (ECN) technique. Spectral noise impedance spectra obtained from power spectral density (PSD) plots for the different systems were compared. It has been observed that the bioleaching system obtained the lowest noise resistance Rsn 0.101MΩ. The reaction mechanism was proposed based on experimental data analysis. The bioleaching process of natural pyrite has been identified as the main function of bio-battery reactions, which distinguishes from the chemical oxidation reaction for the ferric ion and 9k solutions.

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Periodical:

Advanced Materials Research (Volume 1130)

Pages:

268-272

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1130.268

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Online since:

November 2015

Authors:

Guo Bao Chen*, Hong Ying Yang, Hai Jun Li

Keywords:

Bioleaching Process, Biooxidation, Electrochemical Noise, Pyrite

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