Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Mac C. Mugumaoderha"'
Autor:
Gaydardzhiev, Alidor Shikika, Francois Zabene, Fabrice Muvundja, Mac C. Mugumaoderha, Julien L. Colaux, Mohamed Aatach, Stoyan
Publikováno v:
Minerals; Volume 11; Issue 12; Pages: 1392
A novel approach for Ta and Nb extraction consisting of the pre-treatment of a coltan-bearing ore with an ammonium bifluoride sub-molten salt and subsequent acid leaching has been studied. The effects from ore granulometry, ammonium bifluoride (ABF)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::8cf0c93a54530d03293799ba5b35171d
Autor:
Alidor Shikika, Francois Zabene, Fabrice Muvundja, Mac C. Mugumaoderha, Julien L. Colaux, Mohamed Aatach, Stoyan Gaydardzhiev
Publikováno v:
Minerals, Vol 11, Iss 1392, p 1392 (2021)
A novel approach for Ta and Nb extraction consisting of the pre-treatment of a coltan-bearing ore with an ammonium bifluoride sub-molten salt and subsequent acid leaching has been studied. The effects from ore granulometry, ammonium bifluoride (ABF)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::c85e07be6d5dde42953966f2a264c93a
https://www.mdpi.com/2075-163X/11/12/1392
https://www.mdpi.com/2075-163X/11/12/1392
Publikováno v:
Minerals Engineering. 163:106751
An alkaline roasting of a coltan bearing ore from the Numbi deposit (South Kivu, the DRC) was investigated with particular focus on the extraction kinetics of Ta and Nb. Isothermal roasting experiments were carried out to study the effects from KOH t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70e6a0087033383cc948a73fa79739af
https://doi.org/10.1016/j.mineng.2020.106751
https://doi.org/10.1016/j.mineng.2020.106751
Autor:
Mac C. Mugumaoderha, Stoyan Gaydardzhiev, Alidor Shikika, Fabrice A. Muvundja, Manivannan Sethurajan
Publikováno v:
Hydrometallurgy. 198:105496
On-going technological developments, especially in the field of microelectronics and communication have reflected in concomitant increase in the demand for strategic metals such as tantalum (Ta) and niobium (Nb). The extraction of these two metals fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8155cfd13b7d2e2bf1a16b3e88de3e51
https://doi.org/10.1016/j.hydromet.2020.105496
https://doi.org/10.1016/j.hydromet.2020.105496
Publikováno v:
The Journal of Physical Chemistry C. 116:665-670
Phase transitions occurring at the Mn/ZnO interface upon annealing are probed in situ by high-energy X-ray: photoelectron and absorption spectroscopies. A thin Mn film (∼1 nm) is grown on the (0001̄) surface of a ZnO single crystal. Upon annealing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a26d80b41b427ada36fb6ebbc846650
https://doi.org/10.1021/jp206705p
https://doi.org/10.1021/jp206705p
Publikováno v:
The journal of physical chemistry / C 115, 20603-20609 (2011). doi:10.1021/jp206075w
The oxidation of a thin Mn film grown on a ZnO (0001̄) surface and the subsequent diffusion of Mn into the oxide single crystal are investigated in situ by using high-energy X-ray photoelectron spectroscopy (HAXPES). Using hard X-rays allows one not
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d93572355bc2f34297f30bdcd8e3b70
https://doi.org/10.1021/jp206075w
https://doi.org/10.1021/jp206075w