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Long term metal release and acid generation in abandoned mine wastes containing metal-sulphides
(Elsevier, 2018-11)
The sulphide-rich mine wastes accumulated in tailing dumps of La Concordia Mine (Puna of Argentina) have been exposed to the weathering action for more than 30 years. Since then, a series of redox reactions have triggered ...
Distribution of Metals in the Waters and Sediments of Rivers in Central Amazon Region, Brazil
(Soc Brasileira Quimica, 2019-09-01)
Seasonal concentrations of total, particulate and dissolved Al, Cu, Cd. Cr, Fe, Pb and Ni were analyzed in surface water and total metals in sediment samples from black and whitewater rivers within the Itacoatiara City, ...
Investigation of the metal/porcelain interface in LASER-welded Ni-Cr-Mo alloy
(2009-07-22)
The interface formed between the metal and the porcelain of laser-welded Ni-Cr-Mo alloy was studied on a metallurgical basis. The characterization was carried out by using optical microscope, electron scan microscopy and ...
Investigation of the metal/porcelain interface in LASER-welded Ni-Cr-Mo alloy
(2009-07-22)
The interface formed between the metal and the porcelain of laser-welded Ni-Cr-Mo alloy was studied on a metallurgical basis. The characterization was carried out by using optical microscope, electron scan microscopy and ...
Microstructural, Mechanical, and Fracture Characterization of Metal Matrix Composite Manufactured by Accumulative Roll Bonding
(2021-04-01)
Accumulative roll bonding is a severe plastic-forming process proposed to manufacture ceramic particle-reinforced multilayered metal matrix composites. In this work, low-cost composite multilayered laminate was produced ...
Tracking cobalt, REE and gold from a porphyry-type deposit by LA-ICP-MS: a geological approach towards metal-selective mining in tailings
(MDPI, 2020)
High-resolution mineral characterization performed on mine material from a giant porphyry copper deposit shows that critical and precious metals, such as cobalt, lanthanum, gold, silver, and tellurium, are concentrated in ...
Recuperação e recristalização de resíduos de níquel oriundos de aulas práticas no laboratório de química da UTFPR
(Universidade Tecnológica Federal do ParanáPato Branco, 2013-09-18)
This study aimed to test two methods for recovering nickel waste arising from practical classes in chemistry and turn them into nickel chloride. The first method consists in precipitating the residue with pH change in the ...