Restoration of stamp marks on steel components [PDF]
, 2008 Stamp marks are used as a unique identification for a range of items, but these can be erased for criminal activities. Erased marks can sometimes be recovered by etching or magnetic means.
Matthew, Jennifer, Wightman, Graham
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A metal–organic framework/α-alumina composite with a novel geometry for enhanced adsorptive separation [PDF]
, 2016 The development of a metal–organic framework/α-alumina composite leads to a novel concept: efficient adsorption occurs within a plurality of radial micro-channels with no loss of the active adsorbents during the process.
Chen, JP +5 more
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Pyrometallurgical treatment of jarosite residue with a mixture of CaO, SiO2, and CaSi [PDF]
Journal of Mining and Metallurgy. Section B: MetallurgyDuring the electrolytic production of zinc, the iron in solutions is mainly controlled by the precipitation of jarosite. This precipitate also contains valuable metals (Zn, Pb, Cu, Ag) and toxic elements (Hg, Cd, As).
Jiménez-Lugos C. +6 more
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Application of Acidithiobacillus ferrooxidans for recovering metals from electronic waste dust [PDF]
, 2018 The paper discusses metal recovery from metallic wastes by means of pure chemical and biological leaching in an acidic medium. The research tested whether it is possible to remove Cu, Al, Sn and Ag from the dust formed during processing of electronic ...
Blažek, Vladislav +3 more
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Química Nova, 2008 This work describes a hydrometallurgical route for processing spent commercial catalysts (CoMo and NiMo/Al2O3). Samples were preoxidized (500 ºC, 5 h) in order to eliminate coke and other volatile species present.
Ivam Macedo Valverde Júnior +2 more
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Processing of spent NiW/Al2O3 catalysts
Química Nova, 2013 Spent oxidized (500 ºC, 5 h) commercial NiW/Al2O3 catalysts were processed using two different routes: a) fusion with NaOH (650 ºC, 1 h), the roasted mass was leached in water; b) leaching with HCl or H2SO4 (70 ºC, 1-3 h). HCl was the best leachant.
Jéssica Frontino Paulino +2 more
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Simultaneous recovery of metals and degradation of organic species: Copper and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) [PDF]
, 2009 In mixed wastewater streams, the presence of metal ions can retard the destruction of organic contaminants and the efficiency of recovery of the metal is reduced by the presence of organic species.
Chaudhary, AJ, Grimes, SM, Hassan, MU
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Thermal Processing of Jarosite Leach Residue for a Safe Disposable Slag and Valuable Metals Recovery
Metals, 2018 In electrolytic production of zinc, the iron levels in the solutions are controlled by precipitation of jarosite or goethite. These precipitates also co-precipitate unrecovered valuable metals (Zn, Pb, Cu, Ag) as well as elements of concern (As, Cd, Hg).
Minna Rämä +5 more
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Membranes, 2014 Two nanofiltration membranes, a Dow NF 270 polyamide thin film and a TriSep TS 80 polyamide thin film, were investigated for their retention of ionic species when filtering mine influenced water streams at a range of acidic pH values. The functional iso-
Mark Mullett +2 more
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Maleic, glycolic and acetoacetic acids-leaching for recovery of valuable metals from spent lithium-ion batteries: leaching parameters, thermodynamics and kinetics [PDF]
Royal Society Open Science, 2019 Environmentally friendly acid-leaching processes with three organic acids (maleic, glycolic and acetoacetic) were developed to recover valuable metals from the cathodic material of spent lithium-ion batteries (LiCoO2). The leaching efficiencies of Li and
Borui Liu +7 more
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