Use of Yttrium Phosphate as a Coprecipitant for Separation/Concentration of Lanthanoids

Abstract

A useful method to separate/concentrate lanthanoids was developed based on a rapid coprecipitation technique using yttrium phosphate. Lanthanoids, which were quantitatively coprecipitated at pH 3 with yttrium phosphate, could be readily determined by inductively coupled plasma atomic emission spectrometry with indium used as an internal standard element. The detection limits ranged from 0.0003 mg (Yb, Lu) to 0.0099 mg (Er) in 100 mL of sample solutions. The proposed method was applicable to the separation/concentration of lanthanoids in NIST SRM 1515 (apple leaves).

Design and synthesis of chelating diamide sorbents for the separation of lanthanides

“…Many efforts have been made in an attempt to achieve these lanthanide separations. Various techniques, such as capillary eletrophoresis [17,18], coprecipitation [19], solid phase extraction [20][21][22][23][24][25], liquid-liquid extraction [26][27][28], and including cloud point extraction [29], have been developed for separating lanthanides in a variety of matrices. Among these methods, liquid-liquid extraction in conjunction with various organic extractants has proved to be promising, and is currently used for commercial separation and purifying of lanthanides in large scale production [30].…”

Development of a Novel Hollow Fiber Cation-Exchange Membrane from Bromomethylated Poly(2,6-dimethyl-1,4-phenylene oxide) for Removal of Heavy-Metal Ions

“…To date, several techniques have been developed for such purpose, such as filtration, , flotation, cementation, solvent extraction, − reverse osmosis, coprecipitation, , and adsorption . Among them, adsorption is considered an effective method due to its high efficiency and convenience, and a number of polymeric materials have been developed as absorbents, such as chitosan, − cellulose, − polyethylene, − polyvinylalcohol, , and polysulfone .…”