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Sang Jun Yoon,Jae Goo Lee,Hideo Tajima,Akihiro Yamasaki,Tetsuya Nakazato,Hiroaki Tao,Fumio Kiyono 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.3
Extractions of five kinds of lanthanide metal ions by bis(2-ethylhexyl)phosphoric acid (DEHPA) with [1-Cn-3-methylimidazolium][PF6](Cn = C2, C4) or [1-butyl-4-methylpyridinium][PF6] were carried out under various DEHPA and HNO3 concentrations from 0 to 1 M and under different temperature conditions from 298 to 333 K. These results were compared with those using the conventional organic solvent, hexane, in terms of their distribution coefficient values. Under all of the conditions in this study,the ionic liquid system shows more than three times greater extractability for lanthanide compared to when hexane was used. The distribution coefficient of lanthanide ions decreased as the length of the alkyl chain increased from the ethyl to the butyl. In addition, the imidazolium cation generally shows a higher distribution coefficient compared to the pyridinium cation in an ionic liquid. The concentration ratio of lanthanides and DEHPA resulted in an extraction affinity transition for lanthanides. Also evaluated in this study were issues related to the selectivity associated with the lanthanide mixture and the dependency of the ionic radius during lanthanide extraction. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Gene Expression Profiling for Toxicological Assessment of Manufactured Nanoparticles in Rat Lung
Katsuhide Fujita,Yasuo Morimoto,Akira Ogami,Toshihiko Myojyo,Isamu Tanaka,Manabu Shimada,Wei-Ning Wang,Shigehisa Endoh,Kunio Uchida,Hiroaki Tao,Masaharu Inada,Tetsuya Nakazato,Moritaka Tamura,Kazuhiro 환경독성보건학회 2008 한국독성학회 심포지움 및 학술발표회 Vol.- No.-