title: Catalytic ozonation of aqueous phenol over metal-loaded HZSM-5.
abstract: The performances of HZSM-5 and transition metal-loaded HZSM-5 (Mn, Cu, Fe, Ti) catalysts during catalytic ozonation of phenol have been investigated. It was observed the performance order for removal of phenol and COD was Mn/HZSM-5 > Fe/HZSM-5 > Cu/HZSM-5 > Ti/HZSM-5 > HZSM-5. The presence of metals on HZSM-5 enhanced the phenol removal capability of HZSM-5. Mn loading on HZSM-5 was optimized due to its high phenol removal capability amongst metal-loaded HZSM-5 catalysts. Experimental results suggested that low amount of Mn loading on HZSM-5 was sufficient for HZSM-5 to act as catalyst and adsorbent. A maximum of 95.8 wt% phenols and 70.2 wt% COD were removed over 2 wt% Mn/HZSM-5 in 120 min. It was supposed that transition metals mainly acted as ozone decomposers due to their multiple oxidation states that enhanced the ozonation of phenol.
authors.affiliation: Chemical Reaction Engineering Group, Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Darul Takzim, Malaysia. noraishah@fkkksa.utm.my
authors.forename: Nor Aishah Saidina
authors.initials: NA
authors.lastname: Amin
authors.forename: Javaid
authors.initials: J
authors.lastname: Akhtar
authors.forename: H K
authors.initials: HK
authors.lastname: Rai
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D010126:Ozone / Q000737:chemistry*; D019800:Phenol / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification
chemical_list: D014874:Water Pollutants, Chemical; D019800:Phenol; D010126:Ozone; D012822:Silicon Dioxide; D000537:Aluminum Oxide