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Adsorption and catalytic ozonation performance of activated carbon and cobalt‐supported activated carbon derived from brewing yeast
Author(s) -
Wu Guiping,
Wei Wei,
Cui Longzhe
Publication year - 2014
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21796
Subject(s) - activated carbon , adsorption , cobalt , chemistry , catalysis , nuclear chemistry , reaction rate constant , langmuir adsorption model , methylene blue , kinetics , yeast , langmuir , inorganic chemistry , organic chemistry , photocatalysis , biochemistry , physics , quantum mechanics
Activated carbon (AC) was prepared from brewing yeast by Na2 CO3 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 m2 /g, with total pore volumes of 0.81 and 0.80 cm3 /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/O3 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/O3 /AC and 0.0143 min −1 for UV/O3 /Co/AC, respectively.