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Electrodialytic treatment of secondary mining resources for raw materials extraction: Reactor design assessment
- Source :
- Science of The Total Environment, Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Publication Year :
- 2021
-
Abstract
- This work received funding from the European Unions Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 778045 , and from Portuguese funds from FCT / MCTES through grant UIDB/04085/2020 . J. Almeida acknowledges Fundação para a Ciência e a Tecnologia and EcoCoRe Doctoral program for her PhD fellowship PD/BD/135170/2017 . The sustainability of mining activities is compromised due to the high amounts of mining residues generated that have to be disposed of, often in open dams, that may cause environmental deterioration, e.g. release of toxic elements to water supplies. These residues are, however, secondary resources of raw materials. In the case of Panasqueira mine, they even are a source of tungsten, considered a critical raw material. The present work aims to assess the electrodialytic process efficiency for raw materials extraction from Panasqueira mine residues. Experiments were performed with 2 and 3-compartment electrodialytic reactors, applying current intensities between 50 and 100 mA, from 4 to 14 days, and sample suspensions enhanced with NaCl or effluent. Additionally, control experiments with no current application were carried out. The results showed that a 3-compartment reactor operating at 100 mA, with NaCl as supporting electrolyte, presented the highest extraction of copper (13%), tin (10%), tungsten (13%) and arsenic (63%). authorsversion published
- Subjects :
- Environmental Engineering
010504 meteorology & atmospheric sciences
Supporting electrolyte
chemistry.chemical_element
010501 environmental sciences
Raw material
Tungsten
01 natural sciences
Arsenic
Environmental Chemistry
Waste Management and Disposal
Effluent
0105 earth and related environmental sciences
Electrodialytic treatment
Extraction (chemistry)
Pulp and paper industry
Pollution
6. Clean water
Mining residues
chemistry
Tin
Panasqueira
Environmental science
Copper
Subjects
Details
- ISSN :
- 00489697
- Database :
- OpenAIRE
- Journal :
- Science of The Total Environment
- Accession number :
- edsair.doi.dedup.....a24f8b58ce5c343855378c0d24c83e8e
- Full Text :
- https://doi.org/10.1016/j.scitotenv.2020.141822