Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36074
Title: Heterogeneous catalytic ozonation of phenacetin in water using magnetic spinel ferrite as catalyst : comparison of surface property and efficiency
Authors: Qi, F
Xu, BB
Chu, W 
Keywords: Hydroxyl radical
Magnetic nano-particles
Ozonation
Peroxide
Phenacetin
Issue Date: 2015
Publisher: Elsevier
Source: Journal of molecular catalysis A : chemical, 2015, v. 396, p. 164-173 How to cite?
Journal: Journal of molecular catalysis A : chemical 
Abstract: In this study, a systematic investigation on the degradation of phenacetin (PNT) by magnetic spinel ferrite (including MnFe2O4 and NiFe2O4) via catalytic ozonation was carried out. The structural and surface property of the catalyst, the performance and mineralization during PNT degradation, and center dot OH/H2O2 identification were studied. The precursors of the catalyst, i.e. MnFe2(OH)(8) and NiFe2(OH)(8), showed certain magnetic properties and a superior catalytic activity for ozonation enhancement than spinel ferrites. Spinel ferrites containing manganese initiate an ozone mass transfer into the solution, where the critical intermediate (H2O2) is generated. The manganese ferrite spinel triggers H2O2 decomposition in the presence of ozone and generates center dot OH for the mineralization of PNT and its intermediates. Spinel ferrites involved nickel catalyzed ozone decomposition and generate H2O2 and center dot OH. All catalysts showed a weak heavy metal leaching, which suggests that the heterogeneous reaction dominates the catalytic reaction and the resultant effluent is safe for the aqueous environment. The magnetic variation of catalysts involving nickel is insignificant, suggesting that the catalyst can be reused many times. The fate of the intermediates on spinel oxides surface influenced for the catalytic ozonation process differently.
URI: http://hdl.handle.net/10397/36074
ISSN: 1381-1169
DOI: 10.1016/j.molcata.2014.10.001
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