Results 1 to 10 of about 171,397 (261)

An Old Technique with A Promising Future: Recent Advances in the Use of Electrodeposition for Metal Recovery [PDF]

Molecules, 2021
Although the first published works on electrodeposition dates from more than one century ago (1905), the uses of this technique in the recovery of metals are attracting an increasing interest from the scientific community in the recent years.
Yelitza Delgado, Francisco J. Fernández-Morales, Javier Llanos   +2 more
doaj   +2 more sources

Bioleaching as a biotechnological tool for metal recovery: from sewage to space mining [PDF]

Frontiers in Bioengineering and Biotechnology
Heavy metals are essential for technological and economic growth but can cause serious environmental and health problems due to their toxicity and persistence.
Archana Paimpillil Abraham, Simone Schopf   +1 more
doaj   +2 more sources

Metal recovery from spent lithium-ion batteries via two-step bioleaching using adapted chemolithotrophs from an acidic mine pit lake [PDF]

Frontiers in Microbiology
The demand for lithium-ion batteries (LIBs) has dramatically increased in recent years due to their application in various electronic devices and electric vehicles (EVs). Great amount of LIB waste is generated, most of which ends up in landfills.
Lalropuia Lalropuia, Jiri Kucera, Wadih Y. Rassy, Wadih Y. Rassy, Eva Pakostova, Dominik Schild, Martin Mandl, Klemens Kremser, Georg M. Guebitz   +8 more
doaj   +2 more sources

Indispensable role of coal as an energy source in Turkey with focus on biodesulphurization studies and advances

Case Studies in Chemical and Environmental Engineering, 2021
Of late, sustainable energy development has received considerable importance throughout the world due to the growing concerns regarding climate change and environment protection. This in turn, has led to the search for alternatives, which are ecofriendly
Srabani Mishra, Sandeep Panda, Ata Akcil
doaj   +1 more source

Fluorescence microscopic visualization of halophile Bacillus tequilensis CH and mixed culture of acidophilic bacteria

Case Studies in Chemical and Environmental Engineering, 2021
Halophiles have been used as bioremediation agents in degradation of organic pollutants and acidophilic microorganisms are considered as efficient metal leaching agents for mineral-metal bearing wastes. In the present study, halophilic bacteria (Bacillus
Sandeep Panda, Arun Kumar Pradhan, Srabani Mishra, Nilotpala Pradhan   +3 more
doaj   +1 more source

Recovery of precious metals from processed wastewater: conventional techniques nexus advanced and pragmatic alternatives

Journal of Water Reuse and Desalination, 2023
The loss of highly sought-after metals such as gold, silver, and platinum during extraction processes not only constitutes a significant waste of valuable resources but also contributes to alarming environmental pollution.
Adeyemi Ojutalayo Adeeyo, Olugbenga Solomon Bello, Oluwatobi Samuel Agboola, Rebecca Oyedoyin Adeeyo, Joshua Akinropo Oyetade, Mercy Adewumi Alabi, Joshua Nosa Edokpayi, Rachel Makungo   +7 more
doaj   +1 more source

Extraction Of Cobalt From Spent CMB Catalyst Using Supercritical CO2

Archives of Metallurgy and Materials, 2015
The metal extraction from spent CMB catalyst using supercritical CO2(scCO2) was investigated with single organic system, binary organic system and ternary organic system to extract metal ions. Leaching solution of spent CMB catalyst containing 389 mg L−1
Joo S.-H., Shin S.M.
doaj   +1 more source

Pyrometallurgical treatment of jarosite residue with a mixture of CaO, SiO2, and CaSi [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy
During 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., Flores-Favela M., Romero-Serrano A., Hernández-Ramírez A., López-Rodríguez J., Cruz-Ramírez A., Colin-García E.   +6 more
doaj   +1 more source

Rota hidrometalúrgica de recuperação de molibdênio, cobalto, níquel e alumínio de catalisadores gastos de hidrotratamento em meio ácido Hydrometallurgical route to recover molybdenum, nickel, cobalt and aluminum from spent hydrotreating catalysts in acid medium

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, Jéssica Frontino Paulino, Julio Carlos Afonso   +2 more
doaj   +1 more source

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, Julio Carlos Afonso, José Waldemar Silva Dias da Cunha   +2 more
doaj   +1 more source