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Synthesis, Characterization and Study of Phenol Adsorption Over MnOx- CeO2

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Five MnOx-CeO2 samples with a molar ratio Mn-Ce between 0 and 100% were obtained by coprecipitation. The samples, which were called 10/0, 7/3, 5/5, 3/7, 0/10, were characterized by XRD, FTIR, XPS, specific surface area and TPR. Phenol was selected as pollutant. The adsorption of phenol from aqueous solution on Mn-Ce samples was carried out in a batch reactor at 25 and 50° C. The adsorption isotherms were described by Langmuir and Freundlich isotherm models and both model fitted. The characterization results showed the formation of solid solution where Mn3+ replaces Ce4+. The most active solid was Mn-Ce 7/3. The results showed that the adsorption process is a function of the Mn- Ce composition. Thermodynamics parameters ΔG0, ΔH0 and ΔS0 were calculated. These parameters indicated that the adsorption of phenol onto Mn-Ce was spontaneous and exothermic at 25 and 50 °C.
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Keywords: Adsorption; MnOx-CeO2; phenol

Document Type: Research Article

Publication date: August 1, 2014

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  • Current Catalysis is an international peer-reviewed journal, which publishes original research, expert reviews and thematic issues in all core areas of catalysis including theoretical, experimental and applied research. The scope includes heterogeneous catalysis, homogeneous catalysis, bio-catalysis, synthesis and properties of new catalysts including synthesis and catalytic function of novel inorganic solids and complexes, studies that relate catalytic function to fundamental chemical processes in metal complexes and at surfaces, novel concepts in surface chemistry.
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