Temat: vanadium(V) - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of Pyrolox sorbent for vanadium(V) ions removal
Autorzy:: Wójcik, Grzegorz
Hubicki, Zbigniew
Powiązania:: https://bibliotekanauki.pl/articles/2146947.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: vanadium(V)
kinetics
removal
sorption
Pyrolox
Opis:: The sorption of vanadium(V) ions from acidic solutions using the Pyrolox sorbent was studied at varying ions concentrations, pH, contact time and temperature. The investigated ions were determined by means of graphite-furnace atomic absorption spectrometry (GF-AAS). The sorption capacity of vanadium(V) ions was examined in the pH range 2-10. The adsorption capacities of vanadium(V) ions depend on the pH values. Therefore, the initial pH 2 of vanadium(V) results in the highest adsorption capacities. The sorption vanadium(V) kinetics was investigated. The experimental data were analyzed using the pseudo-first-order, pseudo-second-order forms, Elovich, and intra-particle diffusion models. The kinetics of vanadium(V) sorption is described by the pseudo-first-order in the best way. The results indicate the endothermic process of V(V) ions sorption. The presented results of vanadium ions recovery from the solutions obtained as a result of spent catalysts leaching indicate the possibility of vanadium recovery.
Źródło:: Physicochemical Problems of Mineral Processing; 2022, 58, 2; art. no. 147974
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Recovery of Fe and V via selective reduction–magnetic separation of vanadium-titanium magnetite concentrate
Autorzy:: Liu, Liwei
Li, Guofeng
Zhao, Libing
Li, Jinpeng
Li, Yanfeng
Powiązania:: https://bibliotekanauki.pl/articles/2146847.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: vanadium-titanium magnetite concentrate
selective reduction
magnetic separation
Fe separation
V separation
Opis:: With the aim of separating Fe and V, a vanadium-titanium magnetite concentrate was selectively reduced, followed by magnetic separation. The processes accompanying reduction of the vanadium-titanium magnetite concentrate were investigated using thermodynamic simulation, experiments, scanning electron microscopy, and electron probe microanalysis. Appropriate reduction conditions and controlling the amount of CaCO3 promoted the reduction of Fe-containing minerals to metallic Fe. V was released from magnetite, ilmenite, and titanomagnetite, and was inhibited to reduce to metallic V, leading to V enrichment in the non-magnetic products in the form of oxides. Moreover, the Fe particles wrapped the slag phase when the amount of CaCO3 exceeded 8%, which is unfavourable for the magnetic separation of Fe and V. Magnetic products with an Fe content of 87.19%, Fe recovery of 82.62%, V content of 0.09% and non-magnetic products with a V content of 1.00% and a V recovery of 85.49% were obtained when the vanadium-titanium magnetite concentrate was reduced for 100 min at 1623 K with a C/O molar ratio of 2.5 and 8% CaCO3, followed by separating at a magnetic field strength of 85 mT.
Źródło:: Physicochemical Problems of Mineral Processing; 2022, 58, 1; 50--62
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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