Heterogeneous activation of peroxymonosulphate by supported ruthenium catalysts for phenol degradation in water

Muhammad, Syaifullah, Shukla, Pradeep R., Tadé, Moses O. and Wang, Shaobin (2012) Heterogeneous activation of peroxymonosulphate by supported ruthenium catalysts for phenol degradation in water. Journal of Hazardous Materials, 215-216 183-190. doi:10.1016/j.jhazmat.2012.02.045


Author Muhammad, Syaifullah
Shukla, Pradeep R.
Tadé, Moses O.
Wang, Shaobin
Title Heterogeneous activation of peroxymonosulphate by supported ruthenium catalysts for phenol degradation in water
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
1873-3336
Publication date 2012-05-15
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2012.02.045
Volume 215-216
Start page 183
End page 190
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Activated carbon (AC) and Zeolite Socony Mobil-5 (ZSM5) supported ruthenium oxide catalysts were prepared and tested to degrade aqueous phenol in the presence of peroxymonosulphate. The physicochemical properties of ruthenium oxide based catalysts were characterised by several techniques such as XRD (X-ray diffraction), SEM-EDS (scanning electron microscopy-energy dispersive X-ray spectroscopy), and N2 adsorption. It was found that RuO2/AC was highly effective in heterogeneous activation of peroxymonosulphate to produce sulphate radicals, presenting higher reaction rate in phenol degradation compared with RuO2/ZSM-5. Degradation efficiency of phenol could be achieved at 100% of phenol decomposition and 60% of total organic carbon (TOC) removal in 1 h at the conditions of 50 ppm phenol, 0.2 g catalyst, 1 g Oxone® in 500 mL solution at 25 °C using the two catalysts. It was also found that phenol degradation was strongly influenced by catalyst loading, phenol concentration, Oxone® concentration and temperature. Kinetic studies proved that a pseudo first order kinetics would fit to phenol decomposition and the activation energies for RuO2/AC and RuO2/ZSM5 were obtained to be 61.4 and 42.2 kJ/mol, respectively.

Highlights
► RuO2/ZSM5 and RuO2/AC exhibited higher activity in Oxone activation with stable performance. ► RuO2/AC presented higher activity than RuO2/ZSM5. ► Phenol degradation on RuO2/AC and RuO2/ZSM5 followed first order kinetics.
Keyword Ru catalyst
Heterogeneous oxidation
Sulphate radical
Phenol degradation
Peroxymonosulphate activation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Sat, 16 Aug 2014, 02:07:38 EST by Vicki Thompson on behalf of School of Chemical Engineering