Electric arc furnace (EAF) dust is globally one of the biggest metal-containing waste fractions, with a composition that challenges recycling back to steel process due high Zn and Pb content, which also prevents it from being landfilled. The current study presents flowsheet zinc lead removal EAF via citric acid leaching, by precipitation, further solvent extraction (SX) for recovery. produces fractions can be directly routed plant (leach residue), electrowinning (pregnant leach solution,...

Despite of being the most common hydrometallurgical process for extraction gold from ores and concentrates, cyanide leaching is blamed its hazardous impact on environment human health. These concerns have given a rise alternative cyanide-free technologies, such as cupric chloride leaching. However, state-of-art processes recovery solutions are facing issues high reagent consumption poor selectivity. This article describes an innovative method minor concentrations by repetitive...

In the current study, platinum-present as a negligible component (below 1 ppb, detection limit of HR-ICP-MS at dilutions used) in real industrial hydrometallurgical process solutions-was recovered by an electrodeposition-redox replacement (EDRR) method on pyrolyzed carbon (PyC) electrode, not earlier applied to metal recovery. The recovery parameters EDRR were initially investigated using synthetic nickel electrolyte solution ([Ni] = 60 g/L, [Ag] 10 ppm, [Pt] 20 [H2SO4] g/L), and results...

Abstract The current study outlines the electrochemical recovery of tellurium from a metallurgical plant waste fraction, namely Doré slag. In precious metals plant, is enriched to TROF (Tilting, Rotating Oxy Fuel) furnace slag and therefore considered be lost resource—although itself still contains recoverable amount tellurium. To recover Te, first leached in aqua regia, produce multimetal pregnant leach solution (PLS) with 421 ppm Te dominating dissolved elements Na, Ba, Bi, Cu, As, B, Fe...

In this study, the electrodeposition-redox replacement (EDRR) method was studied for recovery of minor concentrations silver from dilute solutions. The parameter optimization carried out with synthetic solutions similar to oxide button battery recycling effluents, consisting sulfuric acid and concentrated base metal (10 g·L−1 H2SO4, 60 g/L Zn2+) a amount (100 ppm) varying Fe3+ ions. Results these experiments were analyzed both electrochemically by use SEM-EDS. role dissolved ions...

In this study, we introduce a novel waste battery leaching system that utilizes elemental copper both as reductant and catalyst in sulfuric acid-based lixiviant. Adding chloride ions into the solution stabilizes Cu+ species complexes, which facilitates their use catalysts for electron transfer between LiCoO2 copper. With system, Co, Li dissolutions of over 90% were achieved within two hours under mild conditions (1 M H2SO4, 0.2 NaCl, 30 °C), thereby avoiding high temperatures, concentrated...

Abstract Waste pharmaceutical blister packages (WPBs) are a source of solid waste, which composed plastics and aluminum, therefore acting as potential for secondary aluminum. The structure WPBs makes the recycling aluminum notably more complex than typical recycling. Currently, WBPs disposed municipal waste; thus, is lost from circulation during incineration. In this work, three types were studied, each with two plastic layers metallic layer. Delamination to separate plastic(s) was...

Silver is a metal widely applied in renewable energy applications and therefore subject to resource scarcity. The paper presents new approach for recovering silver from zinc-containing solutions mimicking hydrometallurgical base process solution. By nature, present ores or concentrates more noble than zinc not effectively leached into the sulfate media during processing. This novel concentrating minor amounts media. electrodeposition–redox replacement (EDRR) method was investigated synthetic...

The current paper studies the impact of chlorides on NMC111 (LiNi1/3Mn1/3Co1/3O2) leaching mechanism. Experiments were conducted in chloride (HCl) and mixed sulfate–chloride (H2SO4–NaCl) solutions as well sulfate solution (H2SO4, reference), absence external reductants. results suggest no major differences performance between studied lixiviants at 30 °C (∼75% for Li, ∼35% Co, Ni, Mn), increasing temperature to 80 mainly improved dissolution lithium (>90% all lixiviants). However, behavior...

The recovery of precious metals (Ag and Au) by electrodeposition-redox replacement (EDRR) method was studied in three different solutions: sulfate based Zn-Fe-Ag solution, chloride Cu-Fe-Au solution industrial multi-metal solution. common factor to these solutions is that the base (Zn or Cu) metal present g/L scale while ppm lower level. results showed presence impurity Fe (in scale) decreases efficiency but at same time, it may lead selective dissolution metal, resulting higher purity...

Pyrometallurgical metal production results in side streams, such as dusts and slags, which are carriers of metals, though commonly containing lower concentrations compared to the main process stream. In order improve circular economy selective leaching copper from an intermediate raw material originating primary base plant was investigated. The investigated rich Cu (12.5%), Ni (2.6%), Zn (1.6%), Fe (23.6%) with particle size D80 124 µm. compounds present were nickel ferrite (NiFe2O4),...

Recently, awareness has been raised concerning the need to decrease total environmental footprint throughout life cycle of a medicine, including packaging materials. Aluminum, highly energy-intensive metal, is widely used in blister packages together with polymers. However, these suffer from poor recyclability, clear majority waste (WBPs) disposed municipal solid waste, therefore often being incinerated. In current study, separation aluminum polymer WPBs was investigated make Al available...

Abstract Recycling rare-earth elements (REEs) from Nd-Fe-B magnet waste is an important step towards building a sustainable REE supply chain. In this study, two different processes were systematically investigated and compared. the leaching stage, effect of increasing H 2 SO 4 or HCl concentrations studied it was determined that, although both can successfully promote REEs, B, Fe Co leaching, solutions extracted wider range metals. After oxalate double-sulfate precipitation methods utilized...

In this study, the leaching behaviour of aluminium from waste pharmaceutical blister packages (WPBs) is investigated in sulphuric acid media to build future strategies for recycling non-recycled fraction. The results suggest that hydrometallurgical recycling, passivation during can be mitigated dilute solutions (0.25 M), at high temperatures (60–80 °C) and specifically with H2O2 addition. With system, 100% extraction was achieved within five hours under optimized conditions (H2SO4 = 0.25 M,...

Abstract The technical and environmental aspects of treating electric arc furnace dust (EAFD) using a novel process including alkaline roasting organic acid leaching were evaluated compared to the globally applied conventional Waelz process. global warming potentials roasting–organic (with co-product credits) processes 7.48 4.71 kg CO 2 -eq with 33% Zn as feed material. However, decreasing content, become environmentally more competitive, 12% Zn, corresponding GWP values 6.31 9.26 -eq....

The current paper investigates the leaching phenomena of industrially produced Li-ion battery waste in hydrometallurgical recycling processes. Specifically, it studies reactions NMC111-type (LiNi1/3Mn1/3Co1/3O2) black mass, as well statistical behavior cathode material yields under varying process conditions. investigated variables include reductive agent concentrations (Fe2+, Cu, H2O2) temperature, whereas S/L ratio (200 g/L) and initial acidity (2 M H2SO4) were kept constant. At lower...

In the current study, electrodeposition-redox replacement was applied to a hydrometallurgical solution with main elements of Ca (13.8 g L−1), Al (4.7 Cu (2.5 Zn (1.2 Fe S (1 Mg (0.8 P (0.5 L−1) and Ag (3.5 ppm). The originated from leaching experiment incinerator plant bottom ash, which dissolved into 2 M HCl media at T = 30 °C. resulting deposit on electrode surface analysed SEM-EDS observed Ag/(Cu + Zn) ratio (0.3) indicated remarkable enrichment silver surface, when compared these (Ag/(Cu...

Anode slimes are valuable by-products in the electrolytic copper refinery process. This study aimed to investigate maximum extraction efficiency of Cu and Ni from originating electrorefining anodes containing high [Ni]. In addition, extractions Se, Te, As Bi were determined. A factorial leaching series was conducted with T = 140–160°C, [H2SO4] 12–20%, pO2 2–8 bars solid/liquid ratio 200–400 g/L. The highest 99.7% obtained 20%, 8 bar 160°C while maintaining S/L 200 found be within 97–99% all...