Scholarly record
INNOVATIVE TECHNOLOGICAL PROCESS TO RECOVER METALS FROM BAIA MARE CENTRAL FLOTATION POND BY STEP-LEACHING
Abstract
Historical ore exploitations generated mining waste with useful metal content, near Baia Mare, Romania. Central Flotation Pond (CFP) represents a secondary resource, but also a risk factor of pollution for the environment: groundwater, surface water, soil, air. CFP was inventoried by the Permanent Secretariat of the International Commission for the Protection of Danube River (ICPDR) as high risks spot in Romania with immediate effects on Somes-Tisa sub-basin, due to the content of dangerous substances: cyanide, heavy metals (Pb, Zn, Mn). The report of the European Commission delivered as a result following causes and effects of Aurul (historical pond in Baia Mare area) accident evaluation. Complex ores and concentrates which incorporate a variety of recoverable metals can be effectively processed by using hydrometallurgical routes. This paper took into account data regarding researches based on simply treating by aqueous solutions using different leaching media (e.g. mineral acids, deep eutectic solvents), keeping low processing costs. Also, in hydrometallurgical plants, solutions and slurries generally are transferred easily in closed pipeline systems which indicate another cost advantage. The main objective is to develop an eco-friendly technology to the heavy and precious metals recovery, an alternative to polluting technologies such as cyanide, according to legislative, environmental and economic framework. This can be achieved by extraction of metals from ores using hydrometallurgical processes. The technological flow sheet proposes a step-leaching process using both common acids (H2SO4, HNO3) and deep eutectic solvents (maline, ethaline), followed by precipitation and electrochemical processes for useful elements recovery. Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy (SEM-EDS) method highlighted the presence of Ag, Cu, Pb, Fe in electrochemical deposits obtained from leachates.
Publication Impact Profile
- Captures
- Mendeley - Readers: 10
Publication details
ReferencesPending
Structured references will appear here after the reference import pass. The count is preserved now so the scholarly record is not incomplete.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.