Kinetics and mechanism of arsenic sulfides oxidation

Abstract

The kinetics of oxidation process of realgar and orpiment natural mineral mixture was studied under non-isothermal conditions. The proposed reaction mechanism and chemical transformation investigated by SEM-EDX, XRD and thermal analysis, are discussed. Using mathematical modeling on results obtained during analysis in non-isothermal conditions, activation energy of this process was determined.

Keywords

• thermal analysis
• activation energy
• realgar
• orpiment