Effect of exopolymers on oxidative dissolution of natural rhodochrosite by Pseudomonas putida strain MnB1: An electrochemical study
By Huawei Wang and Daoyong Zhang and Wenjuan Song and Xiangliang Pan and Fahad A. Al-Misned and M. Golam Mortuza
Published in Applied Geochemistry
2015
Abstract
Oxidative dissolution of natural rhodochrosite by the Mn(II) oxidizing bacterium Pseudomonas putida strain MnB1 was investigated based on batch and electrochemical experiments using natural rhodochrosite as the working electrode. Tafel curves and batch experiments revealed that bacterial exopolymers (EPS) significantly increased dissolution of natural rhodochrosite. The corrosion current significantly increased with reaction time for \EPS\ treatment. However, the corrosion process was blocked in the presence of cells plus extra \EPS\ due to formation of the passivation layer. Moreover, the scanning electron microscopy and the energy dispersive spectroscopy (SEM