Journal
HYDROMETALLURGY
Volume 147, Issue -, Pages 241-245Publisher
ELSEVIER
DOI: 10.1016/j.hydromet.2014.06.001
Keywords
Silver recovery; Magnetic nanohydrometallurgy; Magnetic carbon material; Electrodeposition
Categories
Funding
- FAPFSP [2009/08584-6]
- CNPq [405301/2013-8]
- NAP-NN
- PETROBRAS
Ask authors/readers for more resources
The electrochemical recovery of silver by employing recyclable superparamagnetic carbon materials (Cmag) is reported. The proposed strategy explores the adsorption properties and the large surface area of carbon, in conjunction with the superparamagnetic properties of magnetite nanoparticles, in order to collect Ag+ ions from the solution and to promove their rapid confinement at the working electrode surface, using an external magnet. Efficient electrodeposition can be performed in this way, facilitated by the preconcentration effect at the electrode. The adsorption process at the magnetic carbon particles proceeds according to the Langmuir model, exhibiting an adsorption capability of 61.5 mg of silver per gram of Cmag. As a proof of concept, an automated system was specially designed for performing successive batch cycles, encompassing the capture, transport, confinement, electrodepositon of silver, and recycling of the magnetite coated carbon particles from the electrode. The recovery process was successfully demonstrated in this work, by processing discarded X-ray photographic films. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available