Removal of trichloroethylene from aqueous solution by pyrolyzed Japanese cedar bark |
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Authors: | Yasuji Kurimoto Shuichi Doi Masakazu Aoyama |
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Institution: | (1) Institute of Wood Technology, Akita Prefectural University, 11-1 Kaieizaka, 016-0876 Noshiro, Japan;(2) Hokkaido Forest Products Research Institute, 1-10 Nishikagura, 071-0198 Asahikawa, Japan |
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Abstract: | The bark of Japanese cedar (Cryptomeria japonica D. Don) was heated in an N2 atmosphere at 300–900C for 3h to investigate the surface properties of the pyrolyzed residuces and their ability to remove trichloroethylene (TCE) from aqueous solutions. The specific surface areas (S
N) and total pore volumes (V
N) of the pyrolyzed barks steadily increased with rising pyrolysis temperature; no significant differences in the average pore diameters (D
N) were observed at higher temperatures (600–900C). The adsorption capacities of the pyrolyzed residues for TCE were determined under batch mode conditions using an aqueous solution containing 500g TCE dm–3. The adsorption data were well fitted to the Freundlich equation. The adsorption capacity of the bark pyrolyzed at 900C was about five times larger than that of commercial activated carbon.This study was presented at the 10th International Symposium on Wood and Pulping Chemistry, Yokohama, June 1999 |
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Keywords: | Removal of trichloroethylene Adsorption Pyrolyzed bark Japanese cedar Cryptomeria japonica D Don |
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