Results 21 to 30 of about 15,305 (262)

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 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

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

LEACH-G: an Optimal Cluster-heads Selection Algorithm based on LEACH

Journal of Software, 2013
A s a classic clustering algorithm , LEACH is widely used in wireless sensor networks. Due to the random cluster head selection process, LEACH does not guarantee optimization for the number and position of cluster heads . In order to further optimize LEACH, a n optimal energy-efficient cluster-heads selection algorithm LEACH-G for LEACH
Hongwei Chen, Chunhua Zhang, Xinlu Zong, Chunzhi Wang   +3 more
openaire   +1 more source

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

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
doaj   +1 more source

Selective Leaching of Gold from Copper Anode Slime Using Concentrated Hydrochloric Acid and Hydrogen Peroxide

Journal of MMIJ, 2019
Leaching of copper anode slime using hydrochloric acid (HCl) and hydrogen peroxide (H2O2) is performed to recover Au. It is imperative to reduce the amount of the costly oxidizing agent, H2O2, used in this leaching.
Masao MIYAKE, Toshimasa ISHII, Kei YAMAGAMI, Tetsuji HIRATO   +3 more
doaj   +1 more source

Selective Copper Recovery by Acid Leaching from Printed Circuit Board Waste Sludge

Metals, 2020
The most challenging issue associated with recycling the sludge generated from printed circuit boards (PCBs) is the separation of copper (Cu) from iron (Fe), using multi-stage leaching, or adding oxidizing and precipitating agents. Herein we investigated
Ha Bich Trinh, Seunghyun Kim, Jaeryeong Lee   +2 more
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

Selective leaching of Mo from an off-grade gravity lead concentrate in Na2CO3 solution [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2019
The selective leaching of Mo from an off-grade gravity lead concentrate was investigated in Na2CO3 solution using air as an oxidant. The leaching behaviors of Mo and Pb were predicted by the thermodynamic phase diagrams of Pb-Mo-C-H2O system.
Liu Z.-X., Luo Y.-T., Luo W.-B., Li B.-X., Wu X.-W.   +4 more
doaj   +1 more source