This article is concerned with removing the pyritic and total sulfur contents from Dursunbey and. Iskilip lignites by means of trona, which is a natural mineral. The experiments were performed at 20, 50, and 90 degrees C for periods ranging from 15 to 180 minutes using trona solutions with concentrations in the 2.50-15.00% range, and the optimal conditions for sulfur removal were determined. The effect of variable temperature (20, 50, and 90 degrees C), concentrations of distilled water (0%) and trona solution concentration (1.25-15.00%), and experimental duration (15-180 minutes) on sulfur removal was investigated under the optimal conditions determined. It has been established that trona affects sulfur removal in thermal atmosphere and it reduces the pyritic sulfur contents of Dursunbey and. Iskilip lignites by 41 and 31% and the total sulfur contents by 41 and 38%, respectively.