Base metal sulphides are an important source of various metals. They are typically intergrowth and due to the complex nature of their ores, the hydrometallurgical technique is the very convenient way of extracting the desired component. If it is possible to extract the metal from an ore selectively, the subsequent processing steps become less complicated. Mechanical activation seems to be a fav...

During the passage of atmospheric precipitates through porous dump body, products oxidation sulfide minerals are dissolved. As a result, underspoil waters with low pH values and significant amount dissolved metals formed. For most part, all types sewage produced by mining processing enterprises (underspoil, colliery, pit, drainage) combined before treatment, which leads to formation common wate...

Potentiodynamic, impedance measurements were carried out on 304 stainless steel in 0.5N, 1.0, 2.0 and 5.0 N H2SO4 solutions. X-ray photoelectron spectroscopic [XPS] studies carried out on 304 stainless steel in H2SO4 solutions revealed the existence of CrOOH, Cr2O3, -Fe2O3, FeOOH, Mn2O3, Mn3O4, MnS, Ni (OH)2, Ni2O3, NiO, sulphides. The passive film found to contain chromium oxide inner layer an...

In Palaeozoic rocks of South-eastern Bosnia (SEB) there are numerous, but very small vein and replacement barite ore deposits containing up to 10% Pb-Zn-Fe-Cu sulphides. Their geochemical characteristics are compared with large barite monosulphide (Hg-tetrahedrite) ore deposits in Mid-Bosnian Schist Mountains (MBSM). The 87Sr/86Sr isotope ratios in the barites of both areas are very similar, (0...

This review paper is about development and evolution of nanocomposites to smart materials. With the idea formulating dental materials with long lasting maintenance functionality, it important incorporate certain features such as polymer nanofibers, natural fibers, clay, nanoclays, metal oxides, carbon nano fillers, metallic particles sulphides different ions. Therefore, helps deal both external...