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Selective concentration of uranium from bioleach liquor of low-grade uranium ore by nanofiltration process
Ist Teil von
Hydrometallurgy, 2018-06, Vol.178, p.106-115
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Three commercially available nanofiltration membranes (PES-2, NF-1 and NF-2) were employed for selective concentration of uranium from a bioleach liquor of low-grade uranium ore. Performance of the membranes under a variety of operational conditions was evaluated by dead-end and cross-flow filtration experiments. Results showed that the NF-2 membrane had high uranium rejection (˃85%), appropriate permeate flux, and acceptable fouling propensity. Also, NF-2 was more selective than the two other membranes. In general, the nanofiltration process is recommended to be applied in practice for extraction of uranium from the bioleach liquor of low-grade uranium ore.
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•Nanofiltration potential for selective concentration of uranium from a bioleach liquor was investigated.•UO22+ rejection was higher than the rejection of K+ and Ca2+ and was lower than the Fe3+ rejection.•In terms of rejection, selectivity, and permeate flux, NF-2 membrane was better than PES-2 and NF-1.•A novel process for concentration & purification of uranium bioleach liquor was suggested.