Results 101 to 110 of about 405,346 (229)
, 2013 Waste of electrical and electronic equipment is an interesting secondary resource of base and precious metals. Par- ticularly the use of thiourea-leaching in acidic medium was proposed for noble metals recovery.
Tashdjian, Agustin +2 more
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1-(2,6-Dichlorobenzoyl)-3-(3-methoxyphenyl)thiourea [PDF]
, 2009 The two aromatic rings in the title compound, C15H12Cl2N2O2S, enclose a dihedral angle of 37.49 (6)°. The molecule exists in the solid state in its thione form with typical thiourea C-S and C-O bonds lengths, as well as shortened C-N bonds.
Bolte, Michael +5 more
core +1 more source
low-grade refractory gold ore through physical beneficiation an thiourea leaching
, 2003 The work carried out on the processing of a low-grade and refractory gold ore using thiourea is presented. Direct leaching of the "as-received" ore with thiourea has yielded only 16% gold extraction.
Murthy, D S R, Kumar, Vinay, Rao, K V
core
ChemEngineeringStabilization/solidification (S/S) is an effective method used to reduce the leaching of heavy metals from soils, which is a serious environmental problem when soil is contaminated with heavy metals.
Yuntao Chen +4 more
doaj +1 more source
, 1998 A simple and selective method was established for the teaching of methylmercury (MeHg) from river sediments. Spiked sediment samples were extracted with 0.50% m/v thiourea aqueous solution by sonication extraction. The effect of various conditions on the
王小如, Hu, GL, Wang, XR
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Sustainable recovery of zinc and silver from Algerian leaching residues for ecological valorization
Discover EnvironmentThis study demonstrates the ecological valorization of zinc leaching residues from ALZINC (Ghazaouet, Algeria). Under optimized conditions (pH 1.8, 70 °C, 90 min, 2.55 mol/L H₂SO₄), zinc recovery reached ~ 92% and silver recovery ~ 20% using thiourea ...
Abdelhakim Begar +3 more
doaj +1 more source
Reclaiming Gold from Integrated Circuits Waste via a Sustainable Physic-Hydrometallurgical Approach
RecyclingIntegrated circuits (ICs), a major fraction of waste electrical and electronic equipment (WEEE), represent an important secondary source of gold (Au). However, recovering high-purity Au from ICs remains challenging due to the high silicon dioxide content
Márcia A. D. Silva +4 more
doaj +1 more source
Assisted dissolution of copper sulfides in ferric sulfate solutions : thiourea and its derivatives
, 2018 A study of the effects of thiourea and various thiourea-related chemicals as additives to acidic ferric sulfate leaching of copper sulfides (chalcopyrite, covellite, and chalcocite) has been performed, considering high-purity copper sulfide species and ...
Quiroz Castillo, Luis Sergio
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Leaching Gold-Silver Ores With Sodium Cyanide and Thiourea Under Comparable Conditions R.I. 9181
, 1988 Leaching Gold-Silver Ores With Sodium Cyanide and Thiourea Under Comparable Conditions R.I. 9181 (1988) 13 p.Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at ...
Hunt, A.H. +2 more
core +1 more source