Selective extraction of thallium(III) in the presence of gallium(III), indium(III), bismuth(III) and antimony(III) by salting-out of an aqueous mixture of 2-propanol

Chung, Nguyen Huu; Nishimoto, Jun; Kato, Osamu; Tabata, Masaaki

doi:10.1016/s0003-2670(02)01425-3

Cited by 47 publications

(13 citation statements)

References 17 publications

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“…In past years, small quantities of Ga were successfully separated from different materials by solvent extraction (Busiew, Tipcowa, and Iwanow 1982;Kakade and Shinde 1993;Venkaji, Naidu, and Rao 1994;Vartak and Shinde 1998;Mishra, Rokade, and Dhadke 2000;Chung et al 2003;Shilmkar, Kolekar, and Anuse 2005;Dzherayan et al 2006). In this work, the previously elaborated (selective and rapid) method of gallium extraction with butyl acetate from 6M HCl was chosen (Połedniok 2008).…”

Section: Separation Of Galliummentioning

confidence: 99%

Spectrophotometric and Inductively Coupled Plasma–Optical Emission Spectroscopy Determination of Gallium in Natural Soils and Soils Polluted by Industry: Relationships between Elements

Połedniok

Kita

Zerzucha

2012

Communications in Soil Science and Plant Analysis

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The aim of this work was to determine gallium contents in different soils of Poland using a sensitive spectrophotometric method based on the complex of Ga(III) with chrome azurol S and benzyldodecyldimethylammonium bromide and inductively coupled plasma-optical emission spectrometry technique. The total content of gallium in the soils clearly depends on the soil location and properties and ranged from 41.7 to 437 μg g -1 . The contents of gallium determined in 10% nitric acid and 1 M of magnesium chloride extract ranges respectively from 38.0 to 81.9% and 20-40% of the total content of this element. A strong correlation has been found between gallium and zinc, cadmium, lead, and copper. The high Pearson correlation coefficient values and the proportional relationship between the concentrations of Ga and these metals may make it possible to treat gallium as an indicator of soil contamination with heavy metals.

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Section: Separation Of Galliummentioning

confidence: 99%

Spectrophotometric and Inductively Coupled Plasma–Optical Emission Spectroscopy Determination of Gallium in Natural Soils and Soils Polluted by Industry: Relationships between Elements

Połedniok

Kita

Zerzucha

2012

Communications in Soil Science and Plant Analysis

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“…Chung et al [10][11][12] have reported on the selective extraction of Au(III) from Pd(II) and Pt(II), Tl(III) from Ga(III), In(III), Bi(III) and Sb(III), and Co(II) from Mn(II), Ni(II) and Cu(II) using the water/2-propanol homogeneous system. Using these separation methods, the extracted chemical species were Na + [AuCl4 -], Na + [TlCl4 -] and Ca 2+ [CoCl4 2-], respectively.…”

Section: Comparison Of the Separation Methods With The Water/2propanomentioning

confidence: 99%

“…Recently, the selective extraction of Au(III), 10 Tl(III) 11 and Co(II), 12 as ion-pair complexes of alkali metal ions coming from the salting-out agents, for instance, Na + [AuCl4 -], Na + [TlCl4 -] and Ca 2+ [CoCl4 2-], has been reported by employing watermiscible 2-propanol as an organic solvent with salting-out. Such applications using polar solvents with a salting-out technique have been reported in the case of extracting metals as anions.…”

Section: Introductionmentioning

confidence: 99%

Toluene/ter-Butanol Mixed Solvent for the Selective Extraction of Cr(VI) from Divalent Heavy Metals

2005

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A solvent-extraction system comprising toluene/ter-butanol (ter-BuOH) mixed solvent as the organic phase was developed to selectively extract Cr(VI) from acidic chloride media in the presence of divalent metals, namely Cd(II), Co(II), Cu(II), Ni(II) and Zn(II) under 5 M CaCl2 salting-out conditions. Chromium(VI) was selectively extracted as a solvated ion-pair of [ter-BuOH2+ x CrO3Cl-] at ter-BuOH mole fractions of between 0.1 and 0.6 (9.0-57.2% in volume). Divalent metals were extracted at ter-BuOH mole fraction over 0.6 with extraction percents of Co (< 20%), Cu (< 15%), Ni (< 10%) and Zn (< 20%). The concentrations of Ca2+, water and ter-BuOH in the organic phase and ter-BuOH in the aqueous phase were determined to find out the effects on the extraction of Cr(VI). The chemical species of Cr(VI) in acidic chloride media containing 5 M CaCl2 and 0.1 M HCl was confirmed to be the CrO3Cl- species. The effects of the acid, salt concentrations in the aqueous phase and the solvent composition of a mixed organic solvent on the extraction of Cr(VI) were evaluated. Based on the above studies, the extraction mechanism was elucidated and the optimum extraction conditions were determined.

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“…The surface of the sorbent carries positive charges at pH values lower than the IEP, which enhances the electrostatic force of attraction with InCl 3 . (In the system studied, the main chemical species of indium in solutions is InCl 4 - [18]). As a result, the process of sorption takes place more easily in a pH range of 2-4, so the adsorption percentage of In(III) is higher.…”

Section: Preparation Of Cadmium Stock Solutionmentioning

confidence: 99%

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

et al. 2010

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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.

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Selective extraction of thallium(III) in the presence of gallium(III), indium(III), bismuth(III) and antimony(III) by salting-out of an aqueous mixture of 2-propanol

Cited by 47 publications

References 17 publications

Spectrophotometric and Inductively Coupled Plasma–Optical Emission Spectroscopy Determination of Gallium in Natural Soils and Soils Polluted by Industry: Relationships between Elements

Spectrophotometric and Inductively Coupled Plasma–Optical Emission Spectroscopy Determination of Gallium in Natural Soils and Soils Polluted by Industry: Relationships between Elements

Toluene/ter-Butanol Mixed Solvent for the Selective Extraction of Cr(VI) from Divalent Heavy Metals

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

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