Solvent regeneration of spent activated carbon in wastewater treatment.
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概要
- 論文の詳細を見る
Ethanol regeneration was applied to spent activated carbon which had adsorbed an organic compound in aqueous solutions, including an industrial wastewater. High regeneration efficiency was achieved except for aromatic compounds substituted by electron-donating groups. In the case where ethanol regeneration was not effective, efficient regeneration was possible using an electron-donating solvent such as <I>N</I>,<I>N</I>-dimethylformamide.<BR>From the viewpoint of practical use, the solvent regeneration of carbon which had adsorbed phenol was studied using fixed-bed runs. It was found that ethanol and toluene showed high regeneration efficiency. The column desorption of phenol was simulated and gave good agreement with observed results. The regeneration efficiency of ethanol and toluene fell to 80% after five regeneration cycles. The influence of phenol concentration in solvent on the regeneration efficiency was experimentally determined, and the results suggested that the amount of solvent can be minimized by using countercurrent multistage operation.
- The Society of Chemical Engineers, Japanの論文
著者
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Tamon Hajime
Department Of Chemical Engineering Graduate School Of Engineering Kyoto University
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Okazaki Morio
Department Of Chemical Engineering Kyoto University
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Saito Takashi
Department Of Agronomy Faculty Of Agriculture Tohoku University
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TOEI RYOZO
Department of Chemical Engineering, Kyoto University
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Kishimura Masaaki
Department of Chemical Engineering, Kyoto University
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