How sustainable is artisanal cobalt mining in DR Congo? That’s the research question which was addressed in a Nature Sustainability paper by a group of researchers of the University of Lubumbashi in collaboration with a team from KU Leuven.
Researchers from the SREMat Group (SIM² KU Leuven) have published a critical review paper on the potential transformation of bauxite residue (“red mud”) into valuable building materials, trying to “put things in perspective”.
Researchers from the ChEMaRTS Research Group (KU Leuven Campus Group T) have developed a method for the extraction of phosphorus from wastewater treatment sludge ash. The work was published in Science of the Total Environment.
Methanesulfonic acid (MSA) has proven again to be a suitable lixiviant for the recovery of valuable metals. Within the SMART project, the SOLVOMET group has developed a solvometallurgical process for the selective recovery of lead and silver from industrial residues.
Rare-earths permanent magnets were selectively roasted with 5 wt.% carbon to obtain a rare-earth phase, separated from iron particles. After mechanical removal of the iron particles, the rare-earth phase was recovered in only 20 min by using the ionic liquid [Hbet][Tf2N].
Neodymium-iron-boron or NdFeB magnets are a vital part of our tech-driven world because of their excellent magnetic properties and versatility
Researchers from the ProcESS and SOLVOMET Group have developed a mechanochemically intensified acid-free leaching process for the recovery of critical metals from NdFeB magnets
Within the SOLCRIMET project (ERC Advanced Grant), SOLVOMET researchers have developed a solvometallurgical process for the separation of yttrium and europium, showing increased efficiency over conventional hydrometallurgical separation routes. The work has been published in Separation and Purification Technology.
Within the SOLCRIMET project (Advanced ERC Grant) Zheng Li et al. (KU Leuven) and colleagues from the University of Texas (Austin) have developed a solvometallurgical process for the separation of GaCl3 and AlCl3. The work has been published in Ind. Eng. Chem. Res.
CaO-FeOx-SiO2 slags can be used as raw material for alkali-activated materials, i.e. a green alternative to Portland cement. In Cement and Concrete Research, KU Leuven & Princeton University researchers reveal new insights into the reaction mechanisms.
Within the SOLCRIMET project (ERC Advanced Grant), Zheng Li et al. discovered that selection of suitable polar solvents can enhance metal separations in liquid-liquid extraction. The work has been published in Chem. Eur. J.
Within the SMART project, Nerea Rodriguez et al. have shown that Deep Eutectic Solvents based on carboxylic acids and choline chloride are not stable in time nor at high temperatures. The work was published in ACS Sustainable Chemistry & Engineering.
The high thermal stability of Cyphos IL 101 allowed SIM² KU Leuven researchers to investigate the electrochemical behavior of indium at temperatures between 100 °C and 180 °C. The electrochemical deposition of indium followed a two-step process. The work was published in Green Chemistry.
Within the framework of the ETN DEMETER project rare-earth permanent magnets were treated with solvometallurgical solutions to remove the metalllic coating prior to direct recycling. The work is published in RSC Advances
Germanium is a precious metal which is mainly used as a semiconductor in electronics and infrared optic industries, and as a polymerisation catalyst for the production of polyethylene terephthalate. Due to its high supply risk and its high economic importance, germanium is considered as one of Europe’s critical metals.
A solvometallurgical route for recycling of SmCo permanent magnets was developed by researchers from the SOLVOMET Group (SIM² KU Leuven). The method is based on non-aqueous solvent extraction to minimize water consumption.
The work is published in Separation and Purification Technology.
In the framework of the EU MSCA-ETN REDMUD project, the occurrence mode of selected rare earths in neutralised-leached bauxite residue was studied by KU Leuven and NTUA. The work is published in Journal of Sustainable Metallurgy.
The SOLVOMET Group (SIM² KU Leuven), which develops solvometallurgical flow sheets, has synthesized new Deep Eutectic Solvents that can selectively dissolve metal oxides from industrial residues derived from the mining industry.
Within the EU H2020 SOCRATES project, SIM² KU Leuven developed a process to selectively recover lead and zinc from iron-rich jarosite residue of the zinc industry. The work is published in ACS Sustainable Chemistry & Engineering.
Within the EU REMAGHIC project, KU Leuven developed a process to recover yttrium and europium from a mixed oxide obtained by the processing of lamp phosphor waste based on solvent extraction with undiluted thiocyanate ionic liquids.
Researchers at SIM² KU Leuven & VVSG investigated the circularity of the household metal packaging cycle in Flanders. They found remarkable discrepancies between experimental (sorting) data and reported literature data.
Metals in spent samarium-cobalt magnet can be recovered by oxidative dissolution of metals in trichloride ionic liquids, followed by metal removal from the leachate with a series of stripping steps. The ionic liquids can be reused for next cycles after regeneration.
Within the EU H2020 REMAGHIC project, a process was developed by KU Leuven & TECNALIA to recover rare earths from CRT phosphor waste based on roasting and leaching with the green solvents acetic acid and methanesulphonic acid.