Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(6), P. 111447 - 111447
Published: Nov. 7, 2023
Language: Английский
Materials, Journal Year: 2023, Volume and Issue: 16(21), P. 7004 - 7004
Published: Nov. 1, 2023
The increasing accumulation of rock waste obtained due to ore processing and its environmental impacts, such as acid mine drainage elevated concentrations heavy metals in soils, necessitates the transformation mining technologies based on concept circular management. research is aimed at improving parameters mechanical activation effect produced technogenic georesources, well expanding application scope disintegrators field using partial backfill mined-out space when developing stratified deposits. In this regard, purpose was substantiate extracting from enrichment tailings their mechanochemical ensure cyclic involved three-dimensional interpolation methods used for data graphical representation. As a result, following found be characteristic Sadonsky degree zinc pre-activated increases logarithmically H2SO4 concentration NaCl proportion decrease 3.5 times. lead activated according Fourier law decreasing mass concentration, an optimal range (0.38–0.51%) decreases six One key results justification applying case directed influence exerted components stowing strips. expand understanding mechanism dry reactivity unevenness several them.
Language: Английский
Citations
46
Journal of Asian Earth Sciences, Journal Year: 2023, Volume and Issue: 259, P. 105912 - 105912
Published: Nov. 3, 2023
Language: Английский
Citations
23
Materials, Journal Year: 2025, Volume and Issue: 18(4), P. 819 - 819
Published: Feb. 13, 2025
Tin, although not considered a critical material in all world regions, is key for modern technologies. The projected scarcity of tin the coming decades emphasizes need efficient recycling methods to maintain uninterrupted supply chains. This review article focuses on recovery from low-grade secondary sources, specifically obsolete printed circuit boards (PCBs) and liquid crystal displays (LCDs). In both types waste, occurs various concentrations different chemical forms-a few percent as metal or alloy PCBs several hundred ppm tin(IV) oxide LCDs. presents pretreatment preconcentrate enhance subsequent leaching. It discusses only conventional acid alkaline leaching techniques but also use complexing agents challenges associated with bioleaching. Due dilution resulting leachates, advanced ion separation preconcentration before final product are shown. Solvometallurgical employing deep eutectic solvents ionic liquids, discussed; promising, they still remain under development.
Language: Английский
Citations
1
Minerals Engineering, Journal Year: 2024, Volume and Issue: 207, P. 108560 - 108560
Published: Jan. 5, 2024
The rate of ferric iron regeneration by microbial oxidation is the determining step in bioleaching printed circuit boards (PCBs). Therefore, improvement volumetric formation key for overall efficiency. impacted both specific and biomass concentration. Limiting exposure microorganisms to accumulated toxic metal ions solution, as well presence inhibiting material components PCBs through biofilm immobilisation, their adaptation these inhibitors, proposed mitigate against decrease while retention immobilisation expected positively impact rate. In this study, a mixed mesophilic culture, consisting Leptospirillum (L.) ferriphilum, Acidithiobacillus (At.) caldus, Acidiplasma (Ap.) cupricumulans dominant species was immobilised on polyurethane foam (PUF) adapted 6.0 g/L Cu2+. ferrous culture compared that planktonic cultures. Further, performance Cu-adapted cultures (6.0 Cu2+) were with non-adapted cells increasing Cu2+ concentrations (0–50 Cu2+). Both demonstrated improved tolerance stress relative cells. showed higher rates (0.0359 ± 0.0023 g Fe2+.L−1.h−1 at 22 than (0.0331 0.0021 Fe2+.L−1.h−1) exceeding 6 g/L. exhibited kinetics (0.0622 0.0064 This study provides novel approach improving minimising inhibitory effect ion L. ferriphilum dominated High activity presents an opportunity systems be used e-waste streams, such PCBs, mineral concentrates, ores wastes Cu2+-rich leachates.
Language: Английский
Citations
8
Minerals, Journal Year: 2024, Volume and Issue: 14(8), P. 796 - 796
Published: Aug. 2, 2024
The beneficiation of low-grade iron ores is a key research and development topic in the mineral processing industry. gradual exhaustion high-grade ore reserves, rising consumer steel demand globally necessitate efficient low-quality to meet steelmaking quality requirements. This comprehensive review explores various techniques for ore, focusing on conventional methods including comminution, froth flotation gravity separation. article discusses principles, processes, equipment used these highlights recent advancements efforts field. also emphasizes importance effective processes enhancing economic viability, sustainable resource management, environmental conservation. Furthermore, it presents case study deposits Botswana, highlighting potential growth that can be achieved by maximizing utilization through reductive roasting, followed magnetic separation using semi-bituminous coal as reductant. Overall, this provides valuable insights into their significance meeting growing high-quality products.
Language: Английский
Citations
7
Brazilian Journal of Chemical Engineering, Journal Year: 2024, Volume and Issue: unknown
Published: Feb. 9, 2024
Language: Английский
Citations
5
The Canadian Journal of Chemical Engineering, Journal Year: 2024, Volume and Issue: 102(8), P. 2892 - 2908
Published: March 3, 2024
Abstract Industrial wastewater sludge is one of the vital sources metals, including heavy valuable and precise metals. Apart from metals' necessity economic value, some are toxic harmful to environment. This review explores technologies currently applied for extracting recovering metals industrial sludge. The have been explained, merits demerits methods, as reported in past investigations, highlighted. salient findings this that hydrometallurgical processes using acid leaching (H 2 SO 4 , HNO 3 HCl, etc.) considered metal extraction process. Metal dissolution, concentration/purification, recovery main stages processes. selection successive methods depends on concentration chemical characteristics Different purification concentrations were reported, adsorption, ion exchange solvent extraction, so forth, while precipitation electrodeposition mainly In review, cost viability process also evaluated by previous studies. may be a source information environmentally friendly cost‐effective
Language: Английский
Citations
5
Chemosphere, Journal Year: 2024, Volume and Issue: 359, P. 142350 - 142350
Published: May 15, 2024
Language: Английский
Citations
5
Separations, Journal Year: 2023, Volume and Issue: 10(2), P. 112 - 112
Published: Feb. 5, 2023
The extraction of useful minerals or geological materials from the Earth’s crust, most typically various sources, is crucial to a country’s development and progress. Mineral-rich countries use these resources transform their economies propel them toward long-term prosperity. There an urgent need for world increase mineral exploration efforts, improve recycling important metal-containing resources, extract using upgraded hydrometallurgical procedures with high recovery efficiency. This review paper highlights importance strategic critical metals in economy role nuclear techniques analysis, process optimization, remediation solvent extraction, adsorption, chromatographic resins. Radiotracer X-Ray Fluorescence spectrometry (XRF), Neutron Activation Analysis (NAA), Diffraction (XRD) are appropriate improving laboratory-based processes, future technical economic benefits. installation novel instruments provide real-time control mining processing plants improved have potential aid broad range metals.
Language: Английский
Citations
12
Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: Feb. 6, 2025
Language: Английский
Citations
0