Results 11 to 20 of about 1,142,283 (203)

Features of choosing the schemes for selective mining of ores and justifying their rational parameters while using heap leaching schemes for processing [PDF]

E3S Web of Conferences, 2020
The article presents data from theoretical and experimental studies related to the search for a solution to an urgent geotechnological problem - selective mining of standard quality ore, substandard and diluted ores, taking into account the peculiarities
Sekisov Gennady, Sobolev Aleksei, Ashimbaev Abdakim   +2 more
doaj   +1 more source

Utilization of amino acid for selective leaching of critical metals from spent hydrodesulfurization catalyst

Frontiers in Chemistry, 2022
While spent catalysts can cause serious environmental pollution, they can be considered an essential secondary metal source due to their high critical metal grades.
Idol Phann, Yu Tanaka, Sae Yamamoto, Naoko Okibe   +3 more
doaj   +1 more source

Studies of Selective Recovery of Zinc and Manganese from Alkaline Batteries Scrap by Leaching and Precipitation

, 2022
Recovery of zinc and manganese from scrapped alkaline batteries were carried out in the following way: leaching in H(2)SO(4) and selective precipitation of zinc and manganese by alkalization/neutralization.
Noga, Piotr, Bydałek, Adam W., Andrzej Piotrowicz, Tomasz Skrzekut, Skrzekut, Tomasz, Adam W. Bydałek, Wędrychowicz, Maciej, Piotr Noga, Maciej Wędrychowicz, Piotrowicz, Andrzej   +9 more
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A clean and efficient method for purifying crude selenium based on a selective leaching - directed decomposition purification process

Materials Research Express, 2022
The rare element selenium is a key material in supporting the development of high-tech and new products. This research has led to the development of a method of purifying crude selenium based on a selective leaching-directed decomposition purification ...
Na Xu, Xiaocai He, Qingxin Xu, Weizhi Diao, Sen Yan, Qiugu He, Tin Ren   +6 more
doaj   +1 more source

SELECTIVE ELECTROEXTRACTION OF BASE METALS FROM LEACHING SOLUTIONS OBTAINED DURING THE RECYCLING OF WASTE PRINTED CIRCUIT BOARDS. I. INTENSIVE GALVANOSTATIC ELECTRODEPOSITION OF COPPER

Studia Universitatis Babes-Bolyai Chemia, 2020
This article presents our results concerning the feasibility of selective electroextraction of copper from leaching solutions obtained during base metals recycling from waste printed circuit boards.
Marian-Iosif FRÎNCU, Eniko COVACI, Sorin-Aurel DORNEANU, Petru ILEA   +3 more
doaj   +1 more source

A Multifocal Study Investigation of Pyrolyzed Printed Circuit Board Leaching

Metals, 2022
Electric waste from numerous devices that are put out of use every day has some form of printed circuit board that contains precious and valuable metals in their components.
Gvozden Jovanović, Mladen Bugarčić, Nela Petronijević, Srecko R. Stopic, Bernd Friedrich, Branislav Marković, Srđan Stanković, Miroslav Sokić   +7 more
doaj   +1 more source

A comparison among bio-derived acids as selective eco-friendly leaching agents for cobalt: the case study of hard metals waste enhancement [PDF]

, 2023
Peculiar chemical, mechanical and magnetic properties make cobalt a key metal for a variety of “hot” applications like cathode production of Li-ion batteries. Cobalt is also the preferred metallic binder for tungsten carbide tools manufacturing.
Amadou, Oumarou Amadou, Martina, Piredda, Stefano, Cara, Matteo, Tegoni, Martina, Cera, Avtar Singh , Matharu, Gian Pietro, De Gaudenzi, Giorgia, De Gioannis, Stefano, Trudu, Aldo, Muntoni, ANGELA, SERPE, Luciano, Marchiò   +11 more
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Electrochemical Selective Leaching and Deposition of Ag, Au and Pt from electronic waste

International Journal of Electrochemical Science, 2017
In this work, selective electrochemical leaching of compact anodes, made from electronic waste (e-waste) powder containing metals such as silver (Ag), gold (Au) and platinum (Pt), was studied in presence of copper (Cu), nickel (Ni), Tin (Sn) and zinc (Zn)
C. Cortés López, V.E. Reyes Cruz, M.A. Veloz Rodríguez, G. Urbano Reyes, J.A. Cobos Murcia, J.L. Nava Montes de Oca   +5 more
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Selective precipitation of ammonium hexachloropalladate from leaching solutions of cemented palladium with zinc [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2022
Palladium (Pd) present in spent electroplating solutions is concentrated by cementation with zinc (Zn) metal powder. Therefore, it is necessary to recover Pd from the cemented Pd.
Nguyen V.N.H., Song S.J., Lee M.S.
doaj   +1 more source

Investigation of the use of ammonium acetate as an alternative lixiviant in the leaching of malachite ore [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2013
The solutions containing ammonia allow for selective leaching of the copper from a copper ore. In this study, the leaching and kinetics of malachite ore were examined using ammonium acetate solutions as an alternative lixiviant.
Künkül Asım, Gülezgin Abdulvahap, Demirkiran Nizamettin   +2 more
doaj   +1 more source