Ultrasound-assisted mineralization of organic contaminants using a recyclable LaFeO3 and Fe3+/persulfate Fenton-like system |
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| Affiliation: | 1. SRM Research Institute, SRM University, Kattankulathur 603203, Chennai, Tamilnadu, India;2. Department of Chemistry, Madras Christian College, Tambaram 600059, Chennai, Tamilnadu, India;3. Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, Tamilnadu, India;4. School of Chemistry, University of Melbourne, Parkville, VIC 3010, Melbourne, Australia;1. Department of Chemistry, Lorestan University, Khoramabad 68135-465, Iran;2. Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran;3. Department of Materials Science and Nanotechnology Engineering, Near East University, 99138 Nicosia, North Cyprus, Mersin 10, Turkey;1. Functional Materials Section (FMS), Materials Science and Technology Division (MSTD), CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Council of Scientific and Industrial Research (CSIR), Industrial Estate P.O., Pappanamcode, Thiruvananthapuram, 695019, Kerala, India;2. Academy of Scientific and Innovative Research (AcSIR) CSIR-NIIST Campus, Thiruvananthapuram, 695019, Kerala, India;1. Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. 87317-51167, Iran;2. Department of Chemistry, College of Science, University of Raparin, Rania, Kurdistan Region, Iraq;3. Department of Microbiology and Immunology, School of Medicine, Kashan University of Medical Sciences, P.O. Box: 87137.81147, Kashan, Iran;4. Anatomical Science Research Center, Kashan University of Medical Sciences, P.O. Box: 87137.81147, Kashan, Iran;5. Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam;1. Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran;2. Environmental Technology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran;3. Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran |
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| Abstract: | A recyclable heterogeneous catalyst has been successfully developed for application in a Fenton-type advanced oxidation process without adding external H2O2. LaFeO3 was prepared from Fe(NO3)3·9H2O and La(NO3)·6H2O by a simple sol-gel method and its catalytic efficiency was evaluated for mineralization of 4-chlorophenol using a Fenton-like process. The mineralization process was carried out under ultrasonication in presence of heterogeneous LaFeO3 catalyst with H2O2 that was produced during ultrasonication. The mineralization process was monitored through total organic carbon (TOC) analysis. Very importantly, utmost 5-fold synergism was evidenced by the ultrasound mediated LaFeO3-catalyzed system. Besides, more than twofold synergism was observed by combining the ultrasound assisted LaFeO3 catalytic process and potassium persulfate (KPS) assisted advanced oxidation process. It is worth to mention that complete mineralization (∼96%) of 4-chlorophenol (initial concentration of 1.25 × 10−4 M) was observed within 1 h in the presence of LaFeO3 (0.5 g L−1) and KPS (1.0 mmol) under ultrasonication (40 kHz). Even after four cycles, the activity of LaFeO3 remained intact which proved its recyclability. Extremely reusable heterogeneous LaFeO3 catalyst makes the system more interesting from both economic and environmental points of view. |
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| Keywords: | Ultrasound 4-Chlorophenol Potassium persulfate Synergistic effect Reusable |
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