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Adsorption and catalytic ozonation performance of activated carbon and cobalt-supported activated carbon derived from brewing yeast

Authors

  • Guiping Wu,

    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
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  • Wei Wei,

    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
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  • Longzhe Cui

    Corresponding author
    1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
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Abstract

Activated carbon (AC) was prepared from brewing yeast by Nainline imageCOinline image activation, and cobalt was supported on activated carbon (Co/AC) by the adsorption–activation method. The XPS test indicated that supported cobalt was Co(II). The total BET surface areas of prepared AC and Co/AC were 957.7 and 847.9 minline image/g, with total pore volumes of 0.81 and 0.80 cminline image/g, respectively. The average pore diameters of AC and Co/AC were found to be 3.8 and 3.3 nm. The contact time required for equilibrium of methylene blue (MB) adsorption onto prepared AC and Co/AC was about 120 min. The maximum uptake of MB by AC and Co/AC was estimated to be 372.1 and 213.5 mg/g, respectively. The presence of prepared AC or Co/AC was advantageous for TOC reduction compared with UV/Oinline image system, and the greatest TOC removal was obtained in the presence of Co/AC. The kinetics of the degradation of MB fitted the Langmuir-first-order model well. The rate constants of Langmuir first-order were determined to be 0.0096 min−1 for UV/Oinline image/AC and 0.0143 min−1 for UV/Oinline image/Co/AC, respectively.

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