Manganese oxides at different oxidation states for heterogeneous activation of peroxymonosulfate for phenol degradation in aqueous solutions
MetadataShow full item record
A series of manganese oxides (MnO, MnO2, Mn2O3 and Mn3O4) were synthesized and tested in heterogeneous activation of peroxymonosulfate (PMS) for phenol degradation in aqueous solutions. Their properties were characterized by several techniques such as X-ray diffraction (XRD), thermogravimetric-differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), and N2 adsorption/desorption isotherms. Catalytic activities of Mn oxides were found to be closely related to the chemical states of Mn. Mn2O3 is highly effective in heterogeneous activation of PMS to produce sulfate radicals for phenol degradation compared with other catalysts (MnO, MnO2, and Mn3O4). The activity shows an order of Mn2O3> MnO > Mn3O4> MnO2. Mn2O3 could completely remove phenol in 60 min at the conditions of 25 mg/L phenol, 0.4 g/L catalyst, 2 g/L PMS, and 25?C. After heat regeneration, the activity could be fully recovered. A pseudo first order model would fit to phenol degradation kinetics and activation energy was obtained as 11.4 kJ/mol.
NOTICE: This is the author’s version of a work that was accepted for publication in Applied Catalysis B: Environmental. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Catalysis B: Environmental, Volumes 142–143, October–November 2013, Pages 729–735. http://doi.org/10.1016/j.apcatb.2013.06.004
Showing items related by title, author, creator and subject.
Photocatalytic generation of sulphate and hydroxyl radicals using zinc oxide under low-power UV to oxidise phenolic contaminants in wastewaterShukla, Pradeep; Fatimah, I.; Wang, Shaobin; Ang, Ming; Tade, Moses (2010)Photochemical and photocatalytic reaction and the combination of both for the oxidation of phenol in aqueous solution were investigated. Photochemical reaction was carried out using three different types of oxidants in ...
Muhammad, Syaifullah (2012)This research is focused on heterogeneous catalytic oxidation of phenol usually found in wastewater. Active metals of Ruthenium (Ru) and Cobalt (Co) have been impregnated on cheap support materials such as activated carbon ...
Sun, Hongqi; Liang, Hanwen; Zhou, Guanliang; Wang, Shaobin (2013)Cobalt oxides (Co) and Al2O3-, SiO2-, and TiO2-supported cobalt oxide catalysts were prepared by anaqueous combustion method using urea and glycine as fuels. Their catalytic performance in activationof OXONE for phenol ...