Quantifying Fenton reaction pathways driven by self-generated H₂O₂ on pyrite surfaces.

ABSTRACT: Oxidation of pyrite (FeS₂) plays a significant role in the redox cycling of iron and sulfur on Earth and is the primary cause of acid mine drainage (AMD). It has been established that this process involves multi-step electron-transfer reactions between surface defects and adsorbed O₂ and H₂O, releasing sulfoxy species (e.g., S₂O₃^2-, SO₄^2-) and ferrous iron (Fe²⁺) to the solution and also producing intermediate by-products, such as hydrogen peroxide (H₂O₂) and other reactive oxygen species (ROS), however, our understanding of the kinetics of these transient species is still limited. We investigated the kinetics of H₂O₂ formation in aqueous suspension

SUBMITTER: Gil-Lozano C 

PROVIDER: S-EPMC5337962 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature