Separation and preconcentration of elements

Marczenko, Zygmunt; Balcerzak, Maria

doi:10.1016/s0926-4345(00)80065-6

Cited by 98 publications

(64 citation statements)

References 148 publications

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“…1,10-Phenanthroline, 2,4,6-tris(2-pyridyl)-s-triazine (TPTZ), sodium salicylate, ferrous ammonium sulphate hexahydrate, ferric ammonium sulphate dodecahydrate, and L-ascorbic acid were also used. Standard solutions for the determination of iron using phenanthroline, [32][33][34][35] TPTZ, 35,36 and salicylate 37 were prepared according to standard/reference methods.…”

Section: Materials and Reagentsmentioning

confidence: 99%

“…A 1 mL portion of each of the ascorbic acid, phenanthroline and acetic/acetate buffer solution (pH 4.0) were added, and the ask was completed to the mark with water, mixed well, and set aside for 15 min to allow for full colour development. [32][33][34][35] A portion of the mixed solution was transferred to a 10 mm spectrophotometric cell, and the absorbance at 512 nm was measured against a similarly prepared blank. The same sample and blank cells were then transferred to our homemade platform to capture digital images using the Canon digital camera and the Sony smartphone.…”

Section: Instruments and Sowarementioning

confidence: 99%

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The Yxy colour space parameters as novel signalling tools for digital imaging sensors in the analytical laboratory

2018

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Digital imaging devices can be promising, sensitive, and cost-effective chemical sensors for resourcelimited settings. Three model colour reactions of iron were used and monitored using a simple platform consisting only of a camera, a cuvette, and a white paper diffuser. A desktop scanner and a mobile phone camera were also used as imaging devices. Captured images were analysed to obtain the RGB intensities (red, green, blue) and were further converted into the corresponding signals of the grayscale,

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Section: Materials and Reagentsmentioning

confidence: 99%

Section: Instruments and Sowarementioning

confidence: 99%

The Yxy colour space parameters as novel signalling tools for digital imaging sensors in the analytical laboratory

2018

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“…To avoid the analytical interferences between the investigated elements, each element was measured selectively by the following corresponding method 24 : The concentration of Fe (III), Zr (IV), Th (IV) and Ce (III) in the aqueous phase was determined by spectrophotometric thiocyanate (arsenazo III, HCl), Thoron I and (arsenazo III, formate buffer) method at the wavelength 495, 665, 540 and 650 nm, respectively.…”

Section: Spectrophotometric Measurements Of Fe (Iii) Zr (Iv) Th (Ivmentioning

confidence: 99%

Subsequent separation and selective extraction of thorium (IV), iron (III), zirconium (IV) and cerium (III) from aqueous sulfate medium

et al. 2016

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Regarding to their presence as an important constituent in some ores such as monazite, this work aims for selective solvent extraction of thorium (IV), zirconium (IV), iron (III) and cerium (III) from aqueous sulfate medium using different basic and acidic extractants. To elucidate the extractability of these elements, different effective parameters were studied such as contact time, pH value, extractant concentration and the diluents type. In a single element system, Th (IV) was extracted by the primary amines (octylamine and tert.octylamine) and the acidic extractnts [di-(2-ethylhexyl) phosphoric acid (D2EHPA) and (bis(2,4,4-trimethyl pentyl) phosphinic acid (Cyanex 272))]. Moreover, secondary amine (N-methylaniline) is effective for Fe (III) extraction while, the primary amines are suitable for Zr (IV) extraction. Ce (III) can be extracted with the primary amines and D2EHPA. In a mixed elements system, Th (IV) was extracted firstly with Cyanex 272 (65 %) at pH 1 followed by the extraction of Fe (III) with N-methylaniline (95 %), then Zr (IV) was precipitated at pH 2.5 (84 %) while Ce (III) remains in the final aqueous phase.

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“…(Weltz and Sperling 1999) [8]. A spectrophotometric method using a double-beam UV-Visible Shimadzu (model 160A) was applied for REE where they form stable colored complex with Arsenazo III in weakly acidic media at pH about 2.6 and the absorbance me-asured at wavelength 650 nm against a reagent bla-nk solution (Marczenko,1986) [9]. Ca and Mg were determined by a titrimetric method using EDTA.…”

Section: Analytical Proceduresmentioning

confidence: 99%

Characterization and Breakdown of South Gabal EL A’urf Polymineralized ore Material

et al. 2016

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The polymineralized ore material of south Gabal El-A’urf area hosts several economic minerals. These include tanteuxenite, monazite, bastanasite, anatase, as well as zircon. The corresponding interesting rare metals of these minerals include Nb, Ta, lanthanides (REE), Ti, and Zr. Different breakdown techniques have been investigated namely; agitation, pug and fusion. The latter technique is found to be preferred under the following conditions; potassium bisulphate ore/reagent weight ratio of 1/3 at 650 ºC for 3 h. The realized dissolution efficiencies for all metal values were as follows 98.0% and 99.3% for Nb and Ta respectively as well as complete dissolution for lanthanides (REE) and 94% for Ti while Zr did not exceed 20% and concentrated in the residue left behind. This study of breakdown techniques aims to characterization of ore material of south Gabal El-A’urf area as well as preparing a proper leach liquor suitable for further recovery procedure and obtain pure remarket able products.

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Separation and preconcentration of elements

Cited by 98 publications

References 148 publications

The Yxy colour space parameters as novel signalling tools for digital imaging sensors in the analytical laboratory

The Yxy colour space parameters as novel signalling tools for digital imaging sensors in the analytical laboratory

Subsequent separation and selective extraction of thorium (IV), iron (III), zirconium (IV) and cerium (III) from aqueous sulfate medium

Characterization and Breakdown of South Gabal EL A’urf Polymineralized ore Material

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