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  • Catalytic wet peroxidation of pyridine bearing wastewater by cerium supported SBA-15.

Catalytic wet peroxidation of pyridine bearing wastewater by cerium supported SBA-15.

Journal of hazardous materials (2013-02-19)
V Subbaramaiah, Vimal Chandra Srivastava, Indra Deo Mall
ABSTRACT

Cerium supported SBA-15 (Ce/SBA-15) was synthesized by two-step synthesis method in acidic medium. It was further characterized by various characterization techniques such as X-ray diffraction, field-emission scanning electron microscopy, Fourier transform infrared spectroscopy and N2 adsorption-desorption pore size distribution analysis. The Ce/SBA-15 showed highly ordered meso-structure with pore diameter≈70-100Ǻ and pore volume≈0.025cm(3)/g. Ce/SBA-15 was further evaluated as a catalyst for the oxidation of highly toxic and non-biodegradable material, pyridine, by catalytic wet-peroxidation method. The effects of various operating parameters such as catalyst dose (0.5-6g/l), stoichiometric ratio of H2O2/pyridine (1-6), initial pyridine concentration (50-800mg/l) and temperature (313-358K) have been evaluated and optimized. Ce/SBA-15 showed stable performance during reuse for six cycles with negligible cerium leaching. Kinetic and thermodynamic parameters and operation cost have also been determined.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Pyridine hydrochloride, purum, ≥98.0% (AT)
Supelco
Pyridine solution, certified reference material, 2000 μg/mL in methanol
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Pyridine hydrochloride, 98%
Sigma-Aldrich
Cerium, ingot, under oil, 99.9% trace rare earth metals basis
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Pyridine, anhydrous, 99.8%
Sigma-Aldrich
Pyridine hydrobromide, 98%
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Pyridine, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.5% (GC)
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Pyridine, ReagentPlus®, ≥99%
Sigma-Aldrich
Pyridine, ReagentPlus®, ≥99%
Sigma-Aldrich
Pyridine, biotech. grade, ≥99.9%
Sigma-Aldrich
Pyridine, ACS reagent, ≥99.0%