Chromatographic separation of In(III) from Cd(II) in aqueous solutions using commercial resin (Dowex 50W-X8)

Abstract

This work assesses the potential of an adsorptive material, Dowex 50w-x8, for the separation of indium ions from cadmium ions in aqueous media. The adsorption behavior of Dowex 50 w-x8 for indium and cadmium ions was investigated. The effect of pH, initial concentration of metal ions, the weight of resins, and contact time on the sorption of each of the metal ions were determined. It was found that the adsorption percentage of the indium ions was more than 99% at pH 4.0. The result shows that In (III) was most strongly extracted, while Cd(II) was slightly extracted at this pH value. The recovery of In(III) and Cd(II) ions is around 98% using hydrochloric acid as the best eluent.

Trace Elements Characterization in Rocks Using Neutron Activation Analysis, Northwestern Coast, Ras El-Hekma–Egypt

“…Many techniques by destructive procedures such as ICP-AES, ICP-MS, Atomic Absorption, and UV, have been used to determine the elemental compositions in the solid samples [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Neutron activation analysis (NAA) stands out among the highly precise and sensitive analytical methods currently in use in that it does not require prior sample preparation, such as acid digestion, which greatly improves both precision and accuracy in determining the content of major and trace elements in rocks [3,30].…”

Selective recovery of indium from the etching waste solution of the flat-panel display fabrication process

“…Recovery of soluble indium from the mixed matrix solution using solvent extraction [20], chemical precipitation [21,22], ion-exchange resin [23][24][25], and liquid membrane [26] has been reported. However, these conventional approaches are disadvantageous when the concentration of indium is low in solution owing to the lower feed/recovery ratio, bulk consumption of reagent, high-energy requirements, generation of toxic sludge or effluent, and so forth [27].…”