Brown coal remains an important energy source in Europe, including countries such as Germany, Poland, the Czech Republic, and Greece. Open-pit mines disturb environment terms of air quality, hydrology, chemical biological transformations rivers receiving mine waters. In present study, we assessed impact waters from four brown open-pit on contamination river sediments. Chemical analysis included...

Recovery and reuse of materials is important for a circular economy. In recent years the recovery of critical metals from end-of-life products has received increased attention. Various streams, e.g. permanent magnets, nickel metal hydride batteries and fluorescent lamps are considered targets for the recovery of rare earth elements (REEs). The last can be a source of up to six different REEs: e...

The successful return of Chang’E-5 (CE5) samples urges the hot topic study Moon in geochemistry. elemental data analyzed moon reported literature were collected to determine abundances samples. Based on 2365 analytical records from ten missions Apollo, Luna, and CE5, 11 major oxides including Cr2O3, 50 trace elements Ti, P, Mn, Cr, 15 rare earth (REEs) Y are derived based statistical distributi...

Rare earths are critical elements in our modern societies and the ever-increasing demand raises fears of supply risks coming years. This work dealt with feasibility extracting rare earth (REEs) from an industrial waste product exploitation phosphate ores “Djebel Onk” Tébessa eastern region Algeria. The solid residue was first leached at room temperature three different inorganic acids (HNO3, H2...