Cosma, CristianaCristianaCosma2017-03-292017-03-2920052006http://hdl.handle.net/123456789/535PN MENER 1726The aim of the project was to promote performant technological solutions, efficient and more environmental friendly both in the sector of extraction/ore processing and in the field of process wastewater treatment. Treatment possibilities of wastewater from the recovering flows of precious metals based different solubilization systems (HCl + CaCl2, thiourea) were studied and it was elaborated the unitary treatment flow of wastewater from the processing of gold ore by solubilization/complexation with thiourea. Technical treatment flow of wastewater resulted from gold ore processing using thiourea, with high content of heavy metals and organic load, has the following phases: oxidation of organic load and oxidable heavy metals (Fe2+, Mn2+) with hydrogen peroxide (Fenton method), pH correction, metal hydroxides/oxides precipitation, flocculation of suspended matter, settling - phases separation. The treated wastewater is in agreement with discharging conditions into natural receiver to organic load and heavy metals indicators (Fe, Mn, Zn, Cd, Crt, Cu, Pb, Ni).en-USWastewater treatmentPrecious metalsGoldProject