The efficient extraction of Al from coal gangue plays a significant role in achieving the high-
value utilization of coal gangue and alleviating the shortage of bauxite resource. Coal …

The objective of this study was to investigate the feasibility of physico–chemical stabilization
of Cr (24±0.9 mg/kg), Mo (3.7±0.4 mg/kg), Pb (20±1.2 mg/kg), Se (1.1±0.14 mg/kg) and Zn …

Three segments of a core sample collected from the Guxu coalfield (Sichuan Province,
China) were evaluated to determine the rare earth element (REE) leachability and …

The intrinsic link between atmospheric oxygenation, surface seawater redox and
bioproductivity in the upper water column of oceans offers to combine cadmium with …

On one hand, high-sulphur and high-arsenic refractory gold concentrate (HGC) leads to
regional ecological damage. On the other hand, it contains a lot of valuable elements. So …

We studied the leaching kinetics of recovering neodymium in sulfuric acid from the rare earth
elements (REE) slag concentrated by smelting reduction from a magnetite ore containing …

Cobalt is a “critical raw material” owing to its important role in the green transition towards
low-carbon technologies. Due to the ever-increasing demand for cobalt, attention is turned …

The demand for rare earth elements (REEs) has increased over the last decade due to
applications in high technology devices including those in the defense industry. The …

The Taguchi method was used to determine optimum conditions for the dissolution of Zn, Cu
and Fe in Zinc sulphide concentrate in HNO3 solutions. The ranges of experimental …

The removal of pyritic sulfur from a Turkish lignite in aqueous suspension by nitric acid was
investigated. The effects of particle size (− 60,− 100 and− 200 mesh), reaction time (0 …