Giovani Pavoski, Henrique Eisi Toma, Denise Crocce Romano Espinosa, Jorge Alberto Soares Tenório
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引用次数: 0
摘要
开发新方法和可持续工艺是化学工程和纳米技术领域的当务之急。在本研究中，通过一种简便的方法，应用纳米水冶工艺从真正的废催化剂中回收 La。评估了不同前驱体合成超顺磁性铁纳米颗粒（Si@FeNPs）的情况。使用硫酸盐前驱体时，平均颗粒直径值较小。La 酸浸出萃取率为 76%，需要对工艺进行调整。纳米湿法冶金工艺通过 6 个循环将 La 从浸出液中的 Ni 中分离出来。因此，提出了两种工艺。第一种是获得含 La 97% 的产品，Al 为杂质。第二种工艺的 La 纯度为 99%。纳米湿法冶金被证明是一种创新和可持续的工艺，具有 Si@FeNPs 的可回收性，可从二次资源中获得 La。因此，这种纳米湿法冶金工艺符合循环经济的概念，并包含了联合国的可持续发展目标（SDGs）九和十二。
Nanohydrometallurgy with superparamagnetic nanoparticles for selective separation of lanthanum from a real spent catalyst
The development of new methodologies and sustainable processes is a priority in the field of chemical engineering and nanotechnology. In this study, via an easy route, the nanohydrometallurgy process was applied to recover La from a real spent catalyst. The synthesis of superparamagnetic iron nanoparticles (Si@FeNPs) with different precursors was evaluated. The average particle diameter value was smaller when using sulfate precursors. La acid leaching extracted 76% and required process adjustments. The nanohydrometallurgy process separated La from the Ni present in the leach solution with 6 cycles. Therefore, two processes were proposed. The first is obtaining a product with 97% of La and Al as a contaminant. The second with 99% La purity. Nanohydrometallurgy proved to be an innovative and sustainable process, with the recyclability of Si@FeNPs, obtaining La from a secondary source. In this way, this nanohydrometallurgy process meets the concepts of circular economy and encompasses sustainable development goals (SDGs) nine and twelve of the United Nations.
期刊介绍：
The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles.
The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management.
The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).
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