Separation and Preconcentration of Gallium(III), Indium(III), and Thallium(III) Using New Hydrazone-modified Resin

Abstract

Ga(III), In(III) and Tl(III) ions in the presence of different sulfate salts have been successfully separated using 1-(3,4-dihydroxybenzaldehyde)-2-acetylpyridiniumchloride hydrazone (DAPCH) loaded on Duolite C20 in batch and column modes. The obtained modified resin as well as the metal complexes was characterized by elemental analysis and infrared spectra. The extraction isotherms were determined at different pH values. Ga(III) and In(III) are sorbed from aqueous solution at pH 2.5 -3.0 while Tl(III) is sorbed at 2.0. The stripping of the adsorbed ions can be carried out using different concentrations of HCl as eluent. The saturation sorption capacities of Ga(III), In(III) and Tl(III) were 0.82, 0.96 and 0.44 mmol g -1 , where the preconcentration factors are 150, 150 and 100, respectively. The metal(III):Duolite C20-DAPCH ratio was 1:2 for Tl(III) and 1:1 for In(III) and Ga(III). The loaded resin can be regenerated for at least 50 cycles. The utility of the modified resin was tested in aqueous samples and the results show an RSD value of < 5% reflecting their accuracy and reproducibility.

Preparation of poly(GMA-co-PEGDA) microbeads modified with iminodiacetic acid and their indium adsorption properties

“…Thermodynamic parameters calculated from Eqs. (7), (8) are listed in Table 4. The valuation of thermodynamic parameters provides an insight into the interaction between the surface of the microbeads and In 3+ .…”

“…A few investigations on indium recovery via ion-exchange method have been reported. Saberyan reported the adsorption of indium onto Duolite C20 loaded with 1-(3,4-dihydroxybenzaldehyde)-2-acetylpyridiniumchloride hydrazone [8]. Furthermore, Chen et al reported the biosorption of gold onto silk sericin and chitosan [9] and Lam et al reported the adsorption of precious metals onto mesoporous adsorbents [10].…”

A novel method for speciation of Cr(III) and Cr(VI) and individual determination using Duolite C20 modified with active hydrazone

“…1-(3,4-Dihydroxybenzaldehyde)-2-acetylpyridiniumchloride hydrazone was prepared as previously reported [24] by heating under reflux 5 g of GP with 3.7 g 3,4-dihydroxybenzaldehyde in 10 ml absolute ethanol and few drops of glacial acetic acid on a water bath for 4 h till yellow precipitate, filtered off, recrystallized from ethanol and dried in a vacuum desiccator over anhydrous CaCl 2 , m.p., 281-282 • C. Scheme 1. DAPCH-Duolite C20.…”

Modification of chloromethylated polystyrene with 2-mercabtobenzothiazole for application as a new sorbent for preconcentration and determination of Ag+ from different matrices

“…Recently, several methods have been used for pretreatment of the samples. Solid phase extraction (SPE) [7][8][9][10][11][12] is one of them. Its advantage is visible [13] which includes: (i) the fast, simple and direct application in very small sample amounts without loss; (ii) low risk of contamination; (iii) time and cost saving.…”

“…Chelating and modified polymers have found widespread applications in the separation and preconcentration of metal ions from various sources and have some advantages over SPE as higher preconcentration factor, higher selectivity, higher stability, better efficiency, and great simplicity in handling and transfer [20,21].…”