Green Processing of Strategic Elements Based on Magnetic Nanohydrometallurgy

Condomitti, Ulisses; Almeida, Sabrina N.; Silveira, Alceu T.; Melo, Fernando Menegatti de; Toma, Henrique E.

doi:10.21577/0103-5053.20180009

Cited by 9 publications

(7 citation statements)

References 58 publications

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“…Nanosized iron oxide exhibits a wide range of magnetic properties depending on the shape, size and chemical composition of the particles. Magnetite nanoparticles ranging from a few nanometers up to 100 nm are very attractive in a wide array of modern scientific fields, such as nanotechnology [ 4 , 5 , 6 ] biotechnology [ 7 ], MRI contrast agents [ 8 ], magnetic separation and immobilization [ 9 ] etc. These nanomaterials can also be effective for medical applications including bioimaging [ 10 ] and biosensing in diagnostics (theranostics) [ 11 , 12 ], controlled drug delivery and cancer therapeutics [ 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Easy Synthesis and Characterization of Holmium-Doped SPIONs

et al. 2018

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The exceptional magnetic properties of superparamagnetic iron oxide nanoparticles (SPIONs) make them promising materials for biomedical applications like hyperthermia, drug targeting and imaging. Easy preparation of SPIONs with the controllable, well-defined properties is a key factor of their practical application. In this work, we report a simple synthesis of Ho-doped SPIONs by the co-precipitation route, with controlled size, shape and magnetic properties. To investigate the influence of the ions ratio on the nanoparticles’ properties, multiple techniques were used. Powder X-ray diffraction (PXRD) confirmed the crystallographic structure, indicating formation of an Fe3O4 core doped with holmium. In addition, transmission electron microscopy (TEM) confirmed the correlation of the crystallites’ shape and size with the experimental conditions, pointing to critical holmium content around 5% for the preparation of uniformly shaped grains, while larger holmium content leads to uniaxial growth with a prism shape. Studies of the magnetic behaviour of nanoparticles show that magnetization varies with changes in the initial Ho3+ ions percentage during precipitation, while below 5% of Ho in doped Fe3O4 is relatively stable and sufficient for biomedicine applications. The characterization of prepared nanoparticles suggests that co-precipitation is a simple and efficient technique for the synthesis of superparamagnetic, Ho-doped SPIONs for hyperthermia application.

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Section: Introductionmentioning

confidence: 99%

Easy Synthesis and Characterization of Holmium-Doped SPIONs

et al. 2018

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“…Most of these studies have been carried out in order to evaluate the adsorption performance of these nanoadsorbents in aqueous solutions (Condomitti et al 2012 ; Toma 2015 ). This revolutionary concept is being implemented using magnetic nano-hydrometallurgy technology, which is used to extract and recover strategic metal ions in a cost-effective and effective manner (Condomitti et al 2012 , 2018 ; Almeida and Toma 2016 ). The magnetic properties of nanoadsorbent, the colloidal stability, and the chemical composition of nanoabsorbent all contribute to the optimal performance of the adsorption process.…”

Section: Designing and Developing Supply Chain Risk Mitigation Strate...mentioning

confidence: 99%

An assessment of the strategies for the energy-critical elements necessary for the development of sustainable energy sources

Krishna

Dhass

Arya

et al. 2023

Environ Sci Pollut Res

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There have been several strategies developed to increase the diversified supply of energy so that it can meet all of the future demands for energy. As a result, to ensure a healthy and sustainable energy future, it is imperative to warrant reliable and diverse energy supply sources if the “green energy economy” is to be realized. The purpose of developing and deploying clean energy technologies is to improve our overall energy security, reduce our carbon footprint, and ensure that the generation of energy is secure and reliable in the future, making sure that we can spur economic growth in the future. In this paper, advancements in alternative sources of energy sustainability and strategies will be examined to ensure there will be enough fuel to supply all the future demands for energy. Several emerging clean energy technologies rely heavily on the availability of materials that exhibit unique properties that are necessary for their development. This paper examines the roles that rare earth and other energy-critical materials play in securing a clean energy economy and the development of clean energy economies in general. For the development of these technologies to be successful and sustainable, a number of these energy-critical materials are at risk of becoming unavailable. This is due to their limited availability, disruptions in supply, and a lack of suitable resources for their development. An action plan focusing on producing energy-critical materials in energy-efficient ways is discussed as part of an initiative to advance the development of clean and sustainable energy.

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“…Processes from both primary and secondary sources have been evaluated using nanotechnology, wherein the hydrometallurgical route is called nanohydrometallurgy. It has been considered a green technique since the organic extractants are replaced by stable compounds in nanometer-scale (Fe 2 O 3 , ZnO, Ag, and carbon nanotubes, for instance), as previously discussed [144][145][146].…”

Section: Nanotechnologymentioning

confidence: 99%

Cobalt Recovery from Li-Ion Battery Recycling: A Critical Review

Botelho

Stopić

Friedrich

et al. 2021

Metals

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The increasing demand for Li-ion batteries for electric vehicles sheds light upon the Co supply chain. The metal is crucial to the cathode of these batteries, and the leading global producer is the D.R. Congo (70%). For this reason, it is considered critical/strategic due to the risk of interruption of supply in the short and medium term. Due to the increasing consumption for the transportation market, the batteries might be considered a secondary source of Co. The outstanding amount of spent batteries makes them to a core of urban mining warranting special attention. Greener technologies for Co recovery are necessary to achieve sustainable development. As a result of these sourcing challenges, this study is devoted to reviewing the techniques for Co recovery, such as acid leaching (inorganic and organic), separation (solvent extraction, ion exchange resins, and precipitation), and emerging technologies—ionic liquids, deep eutectic solvent, supercritical fluids, nanotechnology, and biohydrometallurgy. A dearth of research in emerging technologies for Co recovery from Li-ion batteries is discussed throughout the manuscript within a broader overview. The study is strictly connected to the Sustainability Development Goals (SDG) number 7, 8, 9, and 12.

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Green Processing of Strategic Elements Based on Magnetic Nanohydrometallurgy

Cited by 9 publications

References 58 publications

Easy Synthesis and Characterization of Holmium-Doped SPIONs

Easy Synthesis and Characterization of Holmium-Doped SPIONs

An assessment of the strategies for the energy-critical elements necessary for the development of sustainable energy sources

Cobalt Recovery from Li-Ion Battery Recycling: A Critical Review

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