Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Recycling REEs from the Waste Products of Silius Mine (SE Sardinia, Italy): A Preliminary Study
The present research represents an approach toward the recycling of extractive waste inspired by circular economy and sustainability that is developed in accordance with Goal 12 of the United Nations 2030 Agenda for Sustainable Development Goals. A new procedure for the recovery of REEs from fluorite–barite–galena ores with calcite gangue from the Silius mine (Sardinia, Italy) is presented. The considered samples are waste materials of Silius mineralization, collected in the old processing plant of Assemini (near Cagliari). In this orebody, REE minerals consist of prevailing synchysite (a REE-bearing fluorocarbonate) and subordinate xenotime-Y (a Y-bearing phosphate). REE fluorocarbonates are extracted using 50% K2CO3 as the leaching solution, at 100 °C. Using a solution (mL)/sample (g) ratio of 25, about 10% of the total REE content of the considered sample is extracted within 1 h. At the laboratory scale, such alkaline leaching of REE from the waste materials allows the recovery of the CO2 produced as K2CO3 from concentrated KOH, in accordance with a circular flow. Further work is ongoing to scale up the process into a pilot plant, to prove that the method developed within this research can be economically feasible, socially suitable, and environmentally respectful.
Recycling REEs from the Waste Products of Silius Mine (SE Sardinia, Italy): A Preliminary Study
The present research represents an approach toward the recycling of extractive waste inspired by circular economy and sustainability that is developed in accordance with Goal 12 of the United Nations 2030 Agenda for Sustainable Development Goals. A new procedure for the recovery of REEs from fluorite–barite–galena ores with calcite gangue from the Silius mine (Sardinia, Italy) is presented. The considered samples are waste materials of Silius mineralization, collected in the old processing plant of Assemini (near Cagliari). In this orebody, REE minerals consist of prevailing synchysite (a REE-bearing fluorocarbonate) and subordinate xenotime-Y (a Y-bearing phosphate). REE fluorocarbonates are extracted using 50% K2CO3 as the leaching solution, at 100 °C. Using a solution (mL)/sample (g) ratio of 25, about 10% of the total REE content of the considered sample is extracted within 1 h. At the laboratory scale, such alkaline leaching of REE from the waste materials allows the recovery of the CO2 produced as K2CO3 from concentrated KOH, in accordance with a circular flow. Further work is ongoing to scale up the process into a pilot plant, to prove that the method developed within this research can be economically feasible, socially suitable, and environmentally respectful.
Recycling REEs from the Waste Products of Silius Mine (SE Sardinia, Italy): A Preliminary Study
Giuseppina Balassone (Autor:in) / Carla Manfredi (Autor:in) / Ermanno Vasca (Autor:in) / Mariacristina Bianco (Autor:in) / Maria Boni (Autor:in) / Aldo Di Nunzio (Autor:in) / Francesco Lombardo (Autor:in) / Rosaria Mozzillo (Autor:in) / Antonio Marino (Autor:in) / Angela Mormone (Autor:in)
2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Metadata by DOAJ is licensed under CC BY-SA 1.0
Geomechanical investigations in the Silius mine
| British Library Conference Proceedings | 1993
The abandoned Pb-Zn mine of Ingurtosu, Sardinia (Italy)
| Elsevier | 1992
The abandoned Pb-Zn mine of Ingurtosu, Sardinia (Italy)
| British Library Online Contents | 1993
The abandoned Pb-Zn mine of Ingurtosu, Sardinia (Italy)
| British Library Conference Proceedings | 1993
Recovery and re-utilization of the open-pit mine excavations of Lasasai-Bonucoro, Sardinia, Italy
| British Library Conference Proceedings | 1997