Kinetic study on leaching of nickel from Turkish lateritic ore in nitric acid solution

Dissolution kinetics of nickel from lateritic ore in nitric acid solution was investigated. Experimental parameters used were stirring speed (100-600 r/min), temperature (40-96 A degrees C), nitric acid concentration (0.1-2 mol/L) and particle size (< 106 A mu m). The shrinking core model was applied to the results of experiments investigating the effects of leaching temperature in the range of 40-90 A degrees C and nitric acid concentration in range of 0.1-2 mol/L on nickel dissolution rate. The kinetic analysis shows that the nickel dissolution from lateritic ore could be described by diffusion model. The activation energy (E (a)) for the dissolution reaction is calculated as 79.52 kJ/mol.Research Foundation of the Selcuk UniversitySelcuk University [06101021]This study was produced from the PhD thesis of Tevfik Agacayak and supported by The Research Foundation of the Selcuk University under the Project No: 06101021