Complex Characteristic of Zircon from Granitoids of the Verkhneurmiysky Massif (Amur Region)

Machevariani, Maria M.; Alekseenko, Alexey V.; Bech, Jaume

doi:10.3390/min11010086

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…This paper studies the possibility of lanthanide ion removal from diluted aqueous solutions (as exemplified by yttrium ions) by the ion flotation method using SDS as the Water 2021, 13, 3493 2 of 7 collector agent [12]. Russia has no less than 20% of the world's REE reserves, but the volume of extraction of raw materials is approximately 2% of the world's extraction volume [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Ion Flotation of Ytterbium Water-Salt Systems—An Innovative Aspect of the Modern Industry

Lobacheva

2021

Water

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Considering the ever-increasing role of rare-earth elements (REE) in the modern hi-tech field, their effective use has tremendous significance, although the production process is inevitably linked to the large volumes of industrial ammonia effluents and heavy metal wastes. In the process of metallurgical separation of metals, the emission of large volumes of noxious gases and radioactive substances is inevitable. Lean technogenic raw material processing is sensible under the condition of the development of non-waste technology. The lack of competent regulations governing the disposal of waste containing REE has an impact on adjacent territories, accumulating in water bodies and, as a result, in the human body. Such an impact cannot pass without a trace, however, the ambiguity of opinions in the scientific community regarding the toxic effects of REE on living organisms determines the relevance of a more detailed study of this issue. The study of ytterbium ions removal from aqueous standard test solutions by the adsorptive bubble method—ion flotation—was conducted. The experiments showed that by using the ion flotation method, the maximum removal of ytterbium (III) was achieved at pH = 8.30. It was shown that ytterbium (+3) distribution coefficients as a function of aqueous phase pH value in the process of ion flotation with sodium dodecyl sulphate were derived. The comparison of values of removal pH with those of hydrate formation pH allowed to conclude that ytterbium floate as basic dihydroxoytterbium dodecyl sulphate Yb(OH)2(C12H25OSO3).

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Section: Introductionmentioning

confidence: 99%

Ion Flotation of Ytterbium Water-Salt Systems—An Innovative Aspect of the Modern Industry

Lobacheva

2021

Water

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“…The paper studies the possibility of lanthanide ions removal from diluted aqueous solutions (as exemplified by yttrium ions) by ion flotation method using NaDS as collector agent [12]. Russia has not less than 20% of world REE reserves, but the volume of extraction of raw materials is approximately 2% of world extraction volume [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The Removal of Rare-Earth Metals from Water-Salt Systems – An Innovative Aspect of the Modern Industry

Lobacheva¹

2021

Preprint

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Considering the ever-increasing role of rare-earth elements (REE) in the modern hi-tech field, their effective use has a tremendous significance, although the production process is inevitably linked to the large volumes of industrial ammonia effluents and heavy metal wastes. In the process of metallurgical separation of metals, the emission of large volumes of noxious gases and radioactive substances is inevitable. Lean technogenic raw material processing is sensible under the condition of the development of non-waste technology. The lack of competent regulations governing the disposal of waste containing REE has an impact on adjacent territories, accumulating in water bodies and, as a result, in the human body. Such an impact cannot pass without a trace, however, the ambiguity of opinions in the scientific community regarding the toxic effects of REE on living organisms determines the relevance of a more detailed study of this issue. The paper presents experimental and theoretical results of studies of ion flotation in the aqueous solutions containing ytterbium cations and a surfactant as a collector - sodium dodecyl sulphate (NaDS).

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“…Indicators of changes in growth conditions and post-growth processes remain in the zoning of diamond crystals, including after the imposition of secondary inhomogeneities [12,13]. Most other deep-seated minerals, except for zircon [14][15][16], are homogenized during long-term natural annealing and show no growth zoning [13,17,18]. Changing environmental conditions are often studied by the zoning of the chemical composition or micro impurities [19][20][21].…”

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confidence: 99%

Thermal history of diamond from Arkhangelskaya and Karpinsky-I kimberlite pipes

Васильев

Kriulina

Azhari

2022

PMI

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This work studies and compares the main morphological, structural, and mineralogical features of 350 diamond crystals from the Karpinsky-I and 300 crystals of the Arkhangelskaya kimberlite pipes. The share of crystals of octahedral habit together with individual crystals of transitional forms with sheaf-like and splintery striation is higher in the Arkhangelskaya pipe and makes 15 %. The share of cuboids and tetrahexahedroids is higher in the Karpinsky-I pipe and stands at 14 %. The share of dodecahedroids in the Arkhangelskaya and Karpinsky-I pipes are 60 % and 50 %, respectively. The indicator role of the nitrogen-vacancy N3 center active in absorption and luminescence is shown. Crystals with the N3 absorption system have predominantly octahedral habit or dissolution forms derived from the octahedra. Their thermal history is the most complex. Absorption bands of the lowest-temperature hydrogen-containing defects (3050, 3144, 3154, 3188, 3310 cm−1, 1388, 1407, 1432, 1456, 1465, 1503, 1551, 1563 cm−1), are typical for crystals without N3 system, where in the absorption spectra nitrogen is in the form of low-temperature A and C defects. The above mentioned bands are registered in the spectra of 16 % and 42 % of crystals from the Arkhangelskaya and Karpinsky-I pipes, respectively. The diamond of the studied deposits is unique in the minimum temperature (duration) of natural annealing. Based on a set of features, three populations of crystals were distinguished, differing in growth conditions, post-growth, and thermal histories. The established regularities prove the multi-stage formation of diamond deposits in the north of the East European Platform and significant differences from the diamonds of the Western Cisurals. The results suggest the possibility of the existence of primary deposits dominated by diamonds from one of the identified populations.

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Complex Characteristic of Zircon from Granitoids of the Verkhneurmiysky Massif (Amur Region)

Cited by 8 publications

References 40 publications

Ion Flotation of Ytterbium Water-Salt Systems—An Innovative Aspect of the Modern Industry

Ion Flotation of Ytterbium Water-Salt Systems—An Innovative Aspect of the Modern Industry

The Removal of Rare-Earth Metals from Water-Salt Systems – An Innovative Aspect of the Modern Industry

Thermal history of diamond from Arkhangelskaya and Karpinsky-I kimberlite pipes

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