title: Preparation and sono-Fenton performance of 4A-zeolite supported alpha-Fe2O3).
abstract: 4A-zeolite supported alpha-Fe(2)O(3) (Fe-4A) was prepared with a hydrothermal-calcination method, and characterized by XRD. Iron oxide in the Fe-4A composite appeared in alpha-Fe(2)O(3) phase and was highly dispersed on the surface of 4A zeolite. Fe-4A composite effectively degraded Orange II under acidic and neutral conditions via sono-Fenton process. 4A-zeolite promoted the production of cavitation bubbles under ultrasonic treatment, while alpha-Fe(2)O(3) promoted the homolysis of oxygen molecule producing hydroxyl radical and high-valent iron-oxo species. Both actions benefited the sono-Fenton reactivity of Fe-4A. Fe-4A-4 composite with a practical alpha-Fe(2)O(3) content of 24.9% showed the maximum sono-Fenton reactivity to Orange II. Dissolved iron ion measurement showed that Fe-4A composite represented a low iron ion dissolution-level, while the repeatability test of recycled Fe-4A showed that Fe-4A composite has high reactivity stability and a long life-time under neutral condition in the sono-Fenton reaction.
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Wandong
authors.initials: W
authors.lastname: Cai
authors.forename: Jinlong
authors.initials: J
authors.lastname: Zhang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry; D001557:Benzenesulfonates / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry*; D005290:Ferric Compounds / Q000138:chemical synthesis*; D006861:Hydrogen Peroxide; D017665:Hydroxyl Radical; D010100:Oxygen / Q000737:chemistry; D014465:Ultrasonics; D017641:Zeolites / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D004396:Coloring Agents; D004785:Environmental Pollutants; D005290:Ferric Compounds; D017641:Zeolites; C000499:ferric oxide; D017665:Hydroxyl Radical; D006861:Hydrogen Peroxide; C014722:2-naphthol orange; D010100:Oxygen