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Recovery of Rare Earth Elements by Carbon-Based Nanomaterials—A Review

1
Chemistry Department, CICECO and CESAM & LAQV-REQUIMTE, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
2
Interdisciplinar Centre of Marine and Environmental Research, 4450-208 Matosinhos, Portugal
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(6), 814; https://doi.org/10.3390/nano9060814
Received: 3 May 2019 / Revised: 16 May 2019 / Accepted: 21 May 2019 / Published: 29 May 2019
(This article belongs to the Special Issue Carbon Based Hybrid Nanomaterials)
Modern societies depend strongly on electronic and electric equipment (EEE) which has a side effect result on the large production of electronic wastes (e-waste). This has been regarded as a worldwide issue, because of its environmental impact—namely due to non-adequate treatment and storage limitations. In particular, EEE is dependent on the availability of rare earth elements (REEs), considered as the “vitamins” of modern industry, due to their crucial role in the development of new cutting-edge technologies. High demand and limited resources of REEs in Europe, combined with potential environmental problems, enforce the development of innovative low-cost techniques and materials to recover these elements from e-waste and wastewaters. In this context, sorption methods have shown advantages to pre-concentrate REEs from wastewaters and several studies have reported the use of diverse nanomaterials for these purposes, although mostly describing the sorption of REEs from synthetic and mono-elemental solutions at unrealistic metal concentrations. This review is a one-stop-reference by bringing together recent research works in the scope of the application of carbon nanomaterials for the recovery of REEs from water. View Full-Text
Keywords: carbon nanostructures; E-waste; rare earth elements; solid phase extraction; sorption carbon nanostructures; E-waste; rare earth elements; solid phase extraction; sorption
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Cardoso, C.E.D.; Almeida, J.C.; Lopes, C.B.; Trindade, T.; Vale, C.; Pereira, E. Recovery of Rare Earth Elements by Carbon-Based Nanomaterials—A Review. Nanomaterials 2019, 9, 814.

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