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Bioelectrochemical metal remediation and recovery of Au³⁺, Co²⁺ and Fe³⁺ metal ions

Lookup NU author(s): Jeet Varia, Dr Susana Silva Martinez, Dr Sharon Velasquez OrtaORCiD, Professor Steve BullORCiD, Professor Sudipta Roy

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).

Abstract

We report influences of the gamma proteobacteria Shewanella putrefaciens CN32 on electronation and electrodeposition phenomena of gold, cobalt and iron ionic species dissolved in aqueous effluents of low pH as novel strategies for the recovery and remediation of these metals. Linear sweep and cyclic voltammetry was used and analysed for the evaluation of changes of respective electron transfer reactions occurring at the electrified interface of graphite electrode for electrolytes of pH 2 and low metal ion concentrations of 200 ppm. This study focuses on changes in electronation thermodynamics, preliminary results show shifts in the reverse potentials of gold electrodeposition and ferric iron electronation with implications for energy savings.

Publication metadata

Author(s): Varia J, Silva Martinez S, Velasquez Orta SB, Bull S, Roy S

Publication type: Article

Publication status: Published

Journal: Electrochimica Acta

Year: 2013

Volume: 95

Pages: 125-131

Print publication date: 15/04/2013

Online publication date: 16/02/2013

Date deposited: 02/07/2014

ISSN (print): 0013-4686

ISSN (electronic): 1873-3859

Publisher: Pergamon Press

URL: http://dx.doi.org/10.1016/j.electacta.2013.02.051

DOI: 10.1016/j.electacta.2013.02.051

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