Liquid-liquid Extraction of Lanthanide Ions with bis-2-Ethylhexylphosphinic Acid into Heptane
スポンサーリンク
概要
- 論文の詳細を見る
Bis-2-ethylhexylphosphinic acid(BEHPA) has been studied as a useful extractant for some lanthanide ions(La(Ⅲ), Ce(Ⅲ), Pr(Ⅲ), Nd(Ⅲ), Sm(Ⅲ), Eu(Ⅲ), Gd(Ⅲ), Tb(Ⅲ), Dy(Ⅲ), Y(Ⅲ), Ho(Ⅲ), Er(Ⅲ), Tm(Ⅲ), Yb(Ⅲ) and Lu(Ⅲ)) from their aqueous solutions in the presence of sodium perchlorate. The extraction behavior of the metal ions were investigated and discussed in terms of pH dependency and extractability. The results indicated that the pH of the aqueous phase and BEHPA concentration of the organic solvent were the major parameters that affect the extraction efficiency of the metal ions. The half extraction pH(pH_(1/2)) was found to be 2.85~1.72 for La(Ⅲ)~Nd(Ⅲ), 1.75~0.61 for Sm(Ⅲ)~Y(Ⅲ) and 1.76~0.73 for Ho(Ⅲ)~Lu(Ⅲ) at different concentrations of BEHPA. The metal complexes extracted were proved to be all monomeric species using a slope analysis method. The curve fitting method was also applied to analyze the types of metal complexes extracted: MA_3HA(M means all the fifteen kind lanthanide metal ions). Furthermore, the extraction constants for the extracted metal complexes were estimated.
- 福井大学の論文
- 2009-03-31
福井大学 | 論文
- 福井大学教育地域科学部附属学校園における協働研究の取り組みと課題 -「学校改革会議」の創設と展開-
- 学生の実践的力量形成の事例研究 -2006年度後期「教育実践研究IV」と中教審答申「教職実践演習」(仮称)との関連も含めて-
- 教育実践史研究ノート(2) : 研究方法論的吟味とトモエ学園の事例研究
- 教育実践史研究ノート(1) : 成城小学校の授業研究を事例に
- 母性を育てる学習プログラム開発のための基礎的研究 : 心理・生理・内分泌による乳幼児とのふれあい体験の評価