Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue

The present study focuses on clinoptilolite (CLI)-rich natural zeolitic tuffs and their photocatalytic activity in the degradation of cationic organic dyes. CLI from different regions was tested methylene blue (MB) as a model dye. tests were performed at room temperature atmospheric pressure under visible light irradiation. For all samples, highest observed pH = 6. Total MB varied between 70 91% (C0 10 mg dm–3, 0.2 g dm–3 photocatalyst, during 300 min). It is suggested that presence Fe species studied responsible for activity. increases linearly with content tuffs. photodegradation follows Langmuir–Hinshelwood kinetic model. recyclability showed good stability efficiency photocatalyst. rate decreased 91 to 69% three reaction cycles, indicating promising potential zeolites treatment textile industry wastewater.