No abstract

This works deals with investigation the efficiency of sodium ferrate, Na 2 FeO 4 , obtained by the electrochemical oxidation, as coagulation and flocculation agent for purification of wastewater from the electrolytic refining process from the Bor Copper Refinery and Copper Smelter Plant of the Mining and Smelting Combine Bor. Removal of heavy metals and selenium by barium ferrate in aqueous solutions could be possible up to: 100 % for Cu, 97.18 % for As, 98.37 % for Sb and 6.06 % for Se using ferrate(VI) in the ratio M : Fe(VI) = 1:12. Also, the efficiency dependence of copper sulphide ore leaching from concentrate by the oxidation of copper sulfide and chalcopyrite with ferrate(VI) on the sulphuric acid concentration was investigated in this work. It is found that leaching of copper from vthe copper sulfide concentrate, carried out by ferrate(VI), proceeds easily due to the efficient oxidation of sulfide and sulfur, in respect of the classical acid process that usually needs the addition of strong oxidant, such as oxygen or hydrogen peroxide, to increase the process productivity.

Medicinal and aromatic plants are intensively studied and applied in traditional and official phytotherapy. Medicinal plants can be cultivated or collected from nature. The pharmacological activity of plants is mainly due to the products of secondary metabolism. Recently, more and more attention has been paid to the study of the chemical structure and pharmacological activity of herbal drugs, which contain polyphenols due to their antioxidant and anti-inflammatory effect, and thus a beneficial effect on health.