Calculation of Thermodynamic and Structural Characteristics of Gold and Silver Solvate Complexes

Koizhanova, A. K.; Kenzhaliev, B. K.; Bisengalieva, M. R.; Mukusheva, A. S.; Gogol, Daniil B.; Abdyldaev, N. N.; Magomedov, D. R.

doi:10.1134/s0036023620070116

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…The sorption rate is directly proportional to its concentration in the solution: the higher the concentration of the external solution, the more ions penetrate deep into the sorbent. The rate of penetration of counterions of the boundary layer into the inner layers of the sorbent also increases as the concentration of the external solution increases [ [15], [16]]. Similar dependencies were obtained when studying the effect of temperature on the sorption rate of gold (Table 3).…”

Section: Effect Of the Concentration Of Gold In The Solutionmentioning

confidence: 61%

“…Studies on the temperature effect on the gold sorption from cyanide-alkaline solutions with a low content of cyanide and hydroxyl ions have found that the most favorable temperature for the dicyanoaurate ions sorption is 298 K. An increase in temperature to 308 -318 K, as well as a decrease to 288 K is negative affects the gold sorption rate and depth [ [13], [14], [15], [16]]. As can be seen from the data obtained, with an increase in temperature to 303 K, the exchange degree insignificantly but evenly increased during 6 sorption hours at a temperature of 288; 294; 303 K and was 0.85; 0.98 and 1.0, respectively.…”

Section: Effect Of the Concentration Of Gold In The Solutionmentioning

confidence: 99%

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Studies of the rate of gold sorption by the AM-2B anionite from cyanide-alkaline solutions

Kaumetova¹,

Koizhanova²,

Absalyamov³

et al. 2022

KIMS/CUMR/MShKP

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The paper presents the results of studies on the sorption leaching of gold-containing ore of the Vasilkovskoye deposit. Kinetic dependences of the sorption of gold and associated metals from cyanide-alkali solutions under different physical and chemical factors were obtained. It was found that gold on the AM-2B resin sorbed at a higher rate than, for example, copper and zinc. The solutions were analyzed using modern devices of a new generation: FT-IR spectrometer "Avatar 370". Laboratory studies were performed to determine the gold sorption rate by the AM-2B anionite from cyanide-alkaline solutions. It was found in the process of sorption of gold from multicomponent cyanide-alkali solutions on AM-2B anionite of mixed basicity, with the macroporous structure containing benzyl dimethylamine and dibenzyl dimethyl ammonium functional groups, that an important factor of qualitative and quantitative separation of gold and impurity metals is the concentration of cyanide and hydroxyl ions in solution. The temperature effect on the sorption rate of gold from cyanide-alkali solutions was studied with the temperature dependences F of t, Bt, of t, ln (l - F) of t, and D of t that show that the sorption process of dicyanoaurate ions is controlled by mixed diffusion.

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Section: Effect Of the Concentration Of Gold In The Solutionmentioning

confidence: 61%

Section: Effect Of the Concentration Of Gold In The Solutionmentioning

confidence: 99%

Studies of the rate of gold sorption by the AM-2B anionite from cyanide-alkaline solutions

Kaumetova¹,

Koizhanova²,

Absalyamov³

et al. 2022

KIMS/CUMR/MShKP

View full text Add to dashboard Cite

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“…SCN − is one of the most extensively explored pseudohalides owing to its ability to transmit magnetic coupling interactions and various coordination modes, including μ 1 -terminal, μ 2bridging (end-on, end-to-end), and μ 3 -1,1,3-bridging. [27][28][29][30][31][32][33] The S atom in SCN − , especially, is soft enough to interact with DPI + cations, which may serve as a "bridge" between the M/SCN anions and DPI + cations via secondary hypervalent I(III)⋯S interactions. 34,35 In addition, metal centers with different electronic configurations will affect the charge transfers between DPI + and metal-thiocyanates.…”

Section: Introductionmentioning

confidence: 99%

Photo-sensitive hybrids constructed from diphenyliodonium and metal-thiocyanates: photo-induced structure and property transformations

et al. 2022

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“…Dispersion elements in the column body, fixed on the aeration fittings provide the formation of microbubbles while air supplies under pressure. A vortex pulp flow aeration fitting is mounted in the bottom cone of the installation column with the inclusion of a reagent tank for the injection of basic and additional reagents [ [24], [25], [26], [27], [28]].…”

Section: Introductionmentioning

confidence: 99%

Extraction of gold from low-sulfide gold-bearing ores by beneficiating method using a pressure generator for pulp microaeration

Toktar¹,

Magomedov²,

Коizhanova³

et al. 2022

KIMS/CUMR/MShKP

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Research results on the study of the material composition of low-sulfide gold-bearing ore from the East Kazakhstan deposit are presented. The main non-metallic minerals of the original sample and beneficiation products include quartz, chlorite (clinochlore), carbonates (calcite and dolomite). Pyrite is present predominantly in the form of cubic crystals, sometimes in the form of clusters. The grain size is from 0.03 to 0.40.5 mm, the size of the clusters reaches several mm. Iron oxides (goethite, hydrogoethite) were formed on pyrite, possibly magnetite and ilmenite. The assay test found that the test sample contains 6.04 g/t Au and 7.9 g/t Ag. The content of sulfide minerals is 11.81%. A significant part of gold (85.51%) is in a finely disseminated state in sulfides, as well as in rock-forming minerals 1.22%. The paper presents the results of laboratory studies of the gold- ore beneficiation ability using gravity concentration processes. Gravity enrichment tests were performed on laboratory equipment: Knelson KS-MD 3 centrifugal concentrator, SKO-05 concentration table, and a two-chamber diaphragm jig (OML TsNIGRI type (jig of Central Geological Research Institute for Nonferrous and Precious Metals)). The obtained results of ore beneficiation on the concentration table show the possibility of obtaining a gravity concentrate with a gold grade of 48.9 g/t with a gold recovery of 40.08%. When separating the gravity concentrate on a jig, the gold extraction was 31.6% at a content of 51.4 g/t. It was found that that according to a single-stage beneficiation scheme in a centrifugal concentrator, a gold-bearing concentrate with a gold content of 58.3 g/t was obtained with a recovery of 80.6%. The dependence of the gold extraction and its content in the gravity concentrate on the output at the Knelson centrifugal concentrator is shown. The results of ore flotation beneficiation show the possibility of obtaining waste grade flotation tailings with a gold grade of 0.8 g/t. The extraction of gold into the combined concentrate, with a gold content of 49.7 g/t, is 88.88%.

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Calculation of Thermodynamic and Structural Characteristics of Gold and Silver Solvate Complexes

Cited by 4 publications

References 21 publications

Studies of the rate of gold sorption by the AM-2B anionite from cyanide-alkaline solutions

Studies of the rate of gold sorption by the AM-2B anionite from cyanide-alkaline solutions

Photo-sensitive hybrids constructed from diphenyliodonium and metal-thiocyanates: photo-induced structure and property transformations

Extraction of gold from low-sulfide gold-bearing ores by beneficiating method using a pressure generator for pulp microaeration

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