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Publikováno v:
Hydrometallurgy. 188:73-80
This work aims to improve the extraction performance of organophosphorus acid extractants (di-(2-ethylhexyl) phosphoric acid (P204), 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (P507, H2A2), di-(2-ethylhexyl) phosphinic acid (P227, H2B2) and
Publikováno v:
Hydrometallurgy. 188:201-215
Direct leaching of sphalerite has been considered as a cost effective and an environmentally benign alternative to the traditional two-step roasting-leaching approach. Yet the slow leaching rate due to the formation of surface passivating phases rema
Publikováno v:
Hydrometallurgy. 188:140-156
Ore samples contain a variety of copper-bearing and gangue minerals that affect the leach kinetics. The kinetic behaviour of a natural ore sample (that contained 48.7% bornite and 15.8% chalcopyrite) in a solution of methanesulfonic acid and ferric c
Publikováno v:
Hydrometallurgy. 187:71-80
There are several limitations of thiosulfate leaching methods in its industrial application. The main limitation is the addition of copper and ammonia which act as catalysts in the thiosulfate leaching process. The introduction of cupric ions can acc
Publikováno v:
Hydrometallurgy. 186:12-20
The influence of sulfate versus chloride media on the adsorption of rare earth elements (REE) by strong acid and iminodiacetic acid resins was investigated. For the strong acid resin, Lewatit MonoPlus SP 112, the adsorption constants recorded for La,
Publikováno v:
Hydrometallurgy. 185:30-37
High-alumina fly ash is an alumina-rich mineral resource that can potentially replace low-grade bauxite. While a wide range of different traditional processes are available for extracting alumina from high-alumina fly ash, these processes have many d
Publikováno v:
Hydrometallurgy. 185:12-22
A microwave-assisted method for the synthesis of Re(VII)-selective anion exchange resins is proposed within this paper. The procedure involved (1) the copolymerization of vinylbenzyl chloride (VBC) and divinylbenzene (DVB), followed by (2) the modifi
Publikováno v:
Hydrometallurgy. 184:140-150
Cerium, the most abundant rare earth element (REE), is typically the largest component of the hard rock REE ores. Demand for less prevalent REE, such as neodymium and dysprosium, have led to a market saturation and price collapse of cerium. One metho
Publikováno v:
Hydrometallurgy. 183:130-141
The surface products formed on chalcopyrite during leaching in sulfate solutions in the presence of various additives were investigated. A combination of SEM, EDS, TEM, FIB and XRD was used to characterize the surface products formed under different
Publikováno v:
Hydrometallurgy. 183:199-206
In this study, the removal effect of arsenic(V) was compared with different lead-containing substances, and the process of arsenic(V) removal with lead oxide was optimized. The results showed that As(V) removal efficiencies with lead powder, lead oxi