Extracting Vanadium, Molybdenum, and Tungsten from Acidic Solutions via Adsorption on Modified Montmorillonite

Ординарцев, Д. П.; Sviridov, A. V.; Свиридов, В. В.

doi:10.1134/s0036024418100229

Cited by 10 publications

(3 citation statements)

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“…Today, sorption forms the basis of many industrial processes and scientific researches, which are particularly based on purification, isolation and separation of various materials, molecules and ions. Sorption and desorption processes in aqueous solutions have long been the subject of central interest in scientific research [20][21][22][23][24]. Despite the significant progress that has been made, sorption is still a very promising method due to its efficiency, ease, low cost, and abundance of sorbing materials, in addition to be an environmentally friendly method.…”

Section: Research Results and Discussion -Selective Sorption For Vanadium And Nickel From The Obtained Concentrate And Their Subsequent Smentioning

confidence: 99%

Assessment of possibility of obtaining alloying components in the process of desalting of heavy hydrocarbon raw materials. Part 2

Issa¹,

Bazhin²

2021

cisisr

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Earlier, the authors had already successfully proposed a method for extracting minerals from crude oil as a first step, to be further developed in this second step in the direction of obtaining solid (metallic and / or oxide) phases of nickel and vanadium. The scientific, practical and strategic importance of the work is clearly-underlined with a general depletion of vanadium and nickel ores. In the current situation of mineral resources with a general depletion of vanadium and nickel ores, it becomes necessary to search for new and alternative resources to obtain these strategic and important metals and their compounds from available resources. Taking into account that vanadium and nickel ores are practically absent in the raw material resources base of some countries, such as Middle East's countries. Thus, a high percentage of imports of this metal product remains, which worsens the economic situation that has developed during political conflicts. The scientific approach was based on a combination of hydrometallurgical and electrometallurgical experiments, consistently carried out through the processes of sorption and desorption during cathodic electrodeposition. Sorption processes for vanadium and nickel were carried out using a mixture of Syrian sorbing materials (incense-type resins and surface-activated natural clays) with finely ground glass SiO 2 . Cathodic electrodeposition experiments were carried out on a copper cathode plate, and on the other hand, an insoluble glassy carbon electrode was used as the anode. All batch experiments were carried out to determine the best conditions for vanadium and nickel sorption by studying six different parameters affecting the sorption capacity of vanadium and nickel. As a result, the maximum sorption capacity of vanadium and nickel was 87.5 % and 91.3 % consistently under the predetermined conditions. Eventually, 7.6 % Ni (with a purity of 97 %) was recovered from the solution after the desorption process by the electrolytic method (during electrolysis); 15.6 % (99.3 % pure) V 2 O 5 and 11.5 % (79 % pure) NiO chemically.

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Section: Research Results and Discussion -Selective Sorption For Vanadium And Nickel From The Obtained Concentrate And Their Subsequent Smentioning

confidence: 99%

Assessment of possibility of obtaining alloying components in the process of desalting of heavy hydrocarbon raw materials. Part 2

Issa¹,

Bazhin²

2021

cisisr

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“…Поэтому поиск способов и материалов для селективного выделения вольфрама(VI) является актуальным. В сорбционном методе разделения в качестве сорбентов применяют различные ионообменные материалы [1], также перспективными считаются высокодисперсные слоистые алюмосиликаты [2]. Модификация путем введения различных видов модификаторов в межслойное пространство алюмосиликатов может придать им высокие адсорбционные способности [3].…”

Section: Introductionunclassified

Adsorption of Tungsten(vi) on Modified Montmorillonite

Korobitsyna,

Pechishcheva,

Krutikova

et al. 2023

TKSC RAS

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The aim of the work was to find conditions for the most adsorption of tungsten by a composite sorbent based on montmorillonite. It is shown that montmorillonite modified by magnetite particles adsorbs up to 99 % of tungsten from 10 mg/l W(VI) solution. The maximum difference in adsorption of W(VI) and Mo(VI) on the initial montmorillonite in an acetate buffer medium at pH = 5,4 was bserved. Desorption of tungsten from the surface of montmorillonite was 98 %.

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“…The extraction and separation of Mo(VI) and W(VI) from diverse resources such as ores, various spent wastes such as catalysts and fluorescent lamps as well as spent nuclear fuel are tasks of great importance. In this context, various techniques such as precipitation, solvent extraction, 15–19 ion exchange 20–24 and adsorption techniques 25 have been employed for the recovery and separation of molybdenum, tungsten and rare earth metals with high purity from these sources. Among these methods, solid–liquid extraction is considered to be an effective and clean method, requiring less use of solvents the other techniques and of high separation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Sorption behavior of tungsten and molybdenum on TVEX‐TOPO resin from nitric acid solution

Masry

Daoud

2021

J of Chemical Tech & Biotech

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BACKGROUND TVEX‐TOPO, which is a commercial low‐cost macroporous copolymer resin containing 50% (w% Extractant fraction of total adsorbent mass) trioctylphosphine oxide (TOPO) was used for solid–liquid extraction of tungsten(VI) (W(VI)) and molybdenum(VI) (Mo(VI)) from nitric acid solution. The different parameters affecting the sorption process of both metal ions such as contact time, [HNO3], initial concentrations, V/m ratio and temperature were separately studied. RESULTS The maximum sorption capacity of TVEX‐ TOPO resin was found to be 17.6 mg g−1 Mo(VI) and 10.7 mg g−1 W(VI) after five sorption stages. Thermodynamic parameters ∆H, ∆G, ∆S were found to be −51.7, −4.3 kJ mol−1 and 157 J mol−1 K−1 for Mo(VI) and −27.4, 1 kJ mol−1 and −93 J mol−1 K−1 for W(VI), respectively. The maximum desorption of W(VI) and Mo(VI) of 97.5% was achieved by reductive stripping with 2% and 4% ascorbic acid, respectively. The highest separation coefficient SMo/W was found to be 13.5 and 10 at V/m = 100 and [HNO3] = 0.1 mol L–1. The W(VI)/TVEX‐TOPO system was found to obey the Langmuir isotherm model with regression factor R2 = 0.999 and qm = 10.5 mg g−1, which is close to the maximum sorption capacity, which equals 10.7 mg g−1. Adsorption kinetics results indicated that the pseudo‐first‐order model is more applicable to W(VI) as qe(exp.) = 4.2 mg g−1 is close to qe(cal.) = 4.3 mg g−1, but Mo(VI) was found to fit with the pseudo‐second order‐model. CONCLUSION Recovery of Mo(VI) and W(VI) was applied to dental metal filaments waste of (Co‐Cr‐Mo) alloys using TVEX‐TOPO and a flow sheet describing the proposed process was given. © 2021 Society of Chemical Industry

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Extracting Vanadium, Molybdenum, and Tungsten from Acidic Solutions via Adsorption on Modified Montmorillonite

Cited by 10 publications

References 1 publication

Assessment of possibility of obtaining alloying components in the process of desalting of heavy hydrocarbon raw materials. Part 2

Assessment of possibility of obtaining alloying components in the process of desalting of heavy hydrocarbon raw materials. Part 2

Adsorption of Tungsten(vi) on Modified Montmorillonite

Sorption behavior of tungsten and molybdenum on TVEX‐TOPO resin from nitric acid solution

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