Perforative Corrosion of Pyrite Enhanced by Direct Attachment of Acidithiobacillus ferrooxidans

摘要

This study aimed to determine the relationship between cell adhesion and pyrite corrosion. In order to determine cell adhesion rates, a new in vivo imaging procedure was developed with CLSM.Total bacteria coverage rates remained low (<14). Adsorption isotherms pointed out two types of cell adhesion sites. Bacteria adhered mainly to corrosion pittings walls with a higher affinity. They favour the formation of deep corrosion pits by maintaining shortrange electronic circulations and they avoid surface passivation.This study completes the common model of bio-corrosion of pyrite and we propose to refine the direct/indirect model by proximal and distal approaches.