Leaching Kinetics of Calcined Magnesite in Citric Acid Solutions

The kinetics of leaching of calcined magnesite by citric acid solution was studied. The effects of reaction temperature, particle size, and acid concentration were investigated. The leaching data showed that the reaction is under chemical kinetics control with an activation energy of 39.1 kJ mol^-1. Additionally, the fact that leaching was controlled by the chemical reaction was also supported by the relationship between the rate constant and the particle radius.