?ining waste, processing by-products and mine water discharges pose a serious threat to the environment as in many cases they contain high concentrations of toxic substances. However, may also be valuable resources. The main target current review is comparative study occurrence rare earth elements (REE) mining waste produced from exploitation coal, bauxite, phosphate rock other ore deposits. Co...

Ghana has gained international attention due to a controversial deal, which it entered with the Chinese Sinohydro Corporation Limited. is investing $2 billion in infrastructure development, return for refined bauxite over 15-year period. When comes resource-backed loans between China and African governments, these types of cooperation are widely known as Angola Model. Besides criticism resource...

Bauxite residue is a high-iron waste of the alumina industry with significant contents scandium, aluminum, and titanium. This study focuses on recovery Sc, Al, Ti, Si from iron-depleted bauxite (IDBR) into valuable products. Iron depletion was carried out using reduction roasting followed by low-intensity magnetic separation to enrich in Sc reduce an adverse effect iron scandium extraction. Hyd...

Bauxite samples from deposits in northern Saudi Arabia were identified the laboratory using spectral reflectance measurements (at 0.3–2.5 ?m) and X-ray diffraction (XRD). The XRD results revealed that bauxite are composed mainly of goethite, gibbsite, boehmite with small amounts kaolinite, hematite, quartz. spectra presence significant iron oxides 0.5 0.87 accompanied by water 1.4 1.9 aluminum ...

Purpose.The purpose is to determine geological and geochemical characteristics of the Sutlegen (Antalya, Turkey) bauxites, identify elements that played a major role in their formation. Methods. X-ray diffraction (XRD) mineral phase analysis, fluorescence (XRF) elemental plasma-mass spectrometry (ICP-MS), petrographic mineralogical analyses, multivariate statistical methods were used. Findings....