title: Co-extraction of lanthanoid(III) with various metal ions in the chelate extraction system with acetylacetone.
abstract: The co-extraction phenomenon was found in a typical chelate extraction system, in which the extraction of lanthanoid ion (Ln3+) with acetylacetone (Hacac) was highly enhanced by various metal ions (M(n+)) such as Cu2+, Al3+, and Zr4+. This phenomenon was ascribed to the formation of the 1:1 adduct between Ln(acac)3 and the M(acac),, extracted into the organic phase. The co-extraction occurred more readily for La3+ than that for Lu3+, and increased in the order of Cu2+ < Al3+ < Zr4+. This work elucidated that the co-extraction due to the adduct formation is a rather common phenomenon in the chelate extraction.
authors.affiliation: Department of Environmental Sciences, Faculty of Science, Ibaraki University, Mito 310-8512, Japan.
authors.forename: Naohiro
authors.initials: N
authors.lastname: Kameta
authors.forename: Hisanori
authors.initials: H
authors.lastname: Imura
authors.forename: Kousaburo
authors.initials: K
authors.lastname: Ohashi