A biosorption-based approach for selective extraction of rare earth elements from coal byproducts

Park, Dan; Middleton, Andrew C.; Smith, Ryan C.; Deblonde, Gauthier J.‐P.; Laudal, Dan; Theaker, Nolan; Hsu‐Kim, Heileen; Jiao, Yongqin

doi:10.1016/j.seppur.2020.116726

Cited by 73 publications

(43 citation statements)

References 55 publications

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“…We chose Zn 2+ and Cu 2+ as non-REE ions for this experiment because they are present at high concentrations (µm range) in environmental media and industrial feedstocks. [14,33] In the absence of RELP, XO formed a 1:1 complex with Cu 2+ , and the relative intensity of A 575 nm increased with increasing metal concentration. In the presence of RELP, no significant reduction of A 575 nm was observed, which indicates that RELP did not bind with Cu 2+ (Figure 4a).…”

Section: Selectivity Of the Relpmentioning

confidence: 99%

Repeated Recovery of Rare Earth Elements Using a Highly Selective and Thermo‐Responsive Genetically Encoded Polypeptide

Hussain

Kim

Cho

et al. 2021

Adv Funct Materials

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Rare earth elements (REEs) have become increasingly important materials owing to their use in the high-tech and clean-energy industries. However, the unpredictable supply, possible health risks, and environmentally unsustainable extraction practices associated with REEs have encouraged the development of green technologies for the selective extraction and recovery of metals. This study presents a simple and innovative approach for the selective extraction and recovery of total REEs. Elastin-like polypeptide (ELP) and the REE-binding domain (lanmodulin) are fused to form REEs-sensitive and thermo-responsive genetically encoded ELP called RELP, where ELP offered a reversible, inverse phase transition for repeated uses. The RELP are purified and used for the selective extraction of total REEs from competing non-REEs metals by controlling the solution temperature (4 and 37 °C) and pH. RELP exhibit high REE specificity, even in the presence of non-REE metal ions. The bound REEs are readily recovered during at least six repeated cycles, and the efficiency is maintained. Moreover, REEs are selectively recovered by RELP from steel slag leachate, a potential industrial source of REEs. RELP offers a rapid, selective, and scalable method for REE extraction and recovery. This technology can be adapted to recover other precious metals and commodities.

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Section: Selectivity Of the Relpmentioning

confidence: 99%

Repeated Recovery of Rare Earth Elements Using a Highly Selective and Thermo‐Responsive Genetically Encoded Polypeptide

Hussain

Kim

Cho

et al. 2021

Adv Funct Materials

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“…Rapid, inexpensive, and sensitive REE characterization techniques are needed both for resource exploration [e.g., locating REE-rich liquid streams such as acid mine drainage (AMD)] , and for characterizing downstream REE production steps, including the separation, purification, and concentration steps during REE processing. For example, scaled-up facilities have been developed, in which a series of solvent, acid/base, or bio-based , extraction and precipitation steps are used to isolate REEs from coal, , coal ash, ,, and AMD, , and high-performance analytical methods can be deployed to evaluate the efficiency of and make real-time adjustments to each production step. In particular, portable luminescence-based sensors are attractive because they offer up to 1000× higher sensitivity than competing portable techniques (e.g., X-ray fluorescence and laser-induced breakdown spectrometers) for REEs while providing significantly lower equipment and operating costs relative to inductively coupled plasma mass spectrometry, a nonportable technique. ,, Several of the REEs in particular are well suited for luminescence-based sensing techniques because they exhibit distinct, element-specific emission bands in the visible and near-infrared regions; these bands arise from f-orbital transitions that are shielded by the outer s- and p-orbitals, yielding narrow, line-like emission bands. − However, these transitions are parity forbidden, leading to poor absorption and inefficient direct excitation .…”

Section: Introductionmentioning

confidence: 99%

Influence of the Anionic Zinc-Adeninate Metal–Organic Framework Structure on the Luminescent Detection of Rare Earth Ions in Aqueous Streams

Crawford

Ellis

Ohodnicki

et al. 2021

ACS Appl. Mater. Interfaces

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Rare earth elements (REEs) are critical to numerous technologies; however, a combination of increasing demand, environmental concerns, and monopolistic marketplace conditions has spurred interest in boosting the domestic REE production from sources such as coal utilization byproducts. The economic viability of this approach requires rapid, inexpensive, and sensitive analytical techniques capable of characterizing the REE content during resource exploration and downstream REE processing (e.g., analyzing REE separation, concentration, and purification production steps). Luminescence-based sensors are attractive because many REEs may be sensitized to produce element-specific emission. Hence, a single material may simultaneously detect and distinguish multiple REEs. Metal–organic frameworks (MOFs) can sensitize multiple REEs, but their viability has been hindered by sensitivity and selectivity challenges. Understanding how the MOF structure impacts the REE sensing efficacy is critical to the rational design of new sensors. Here, we evaluate the sensing performance of seven different anionic zinc-adeninate MOFs with different organic linkers and/or structures for the visible-emitting REEs Tb, Dy, Sm, and Eu. The choice of a linker determines which REEs are sensitized and significantly influences their sensitivity and selectivity against competing species (here, Fe(II) and HCl). For a given linker, structural changes to the MOF can further fine-tune the performance. The MOFs produce some of the lowest detection limits (sub-10 ppb for Tb) reported for the aqueous sensitization-based REE detection. Importantly, the most selective MOFs demonstrated the ability to sensitize the REE signal at sub-ppm levels in a REE-spiked acid mine drainage matrix, highlighting their potential for use in real-world sensing applications.

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“…It is noteworthy, however, that extraction of REEs from apatite has not been extensively studied compared to other main minerals such as monazite, bastnasite and xenotime [9]. REEs are commonly subdivided into three categories: light (LREEs; La-Sm), medium (MREEs; Eu-Dy) and heavy (HREEs; Ho-Lu and Y) [26]. They are known to be difficult to separate from each other, due to their similar chemical and physical properties.…”

Section: Introductionmentioning

confidence: 99%

“…They are known to be difficult to separate from each other, due to their similar chemical and physical properties. Nevertheless, several processing routes have been developed to recover rare earths such as precipitation, filtration, adsorption, ion exchange and solvent extraction [10,11,27], the latter being currently considered as the most commerciallyrelevant technology [9,26,28]. Separation processes based on ion-exchange and solvent extraction techniques have been shown to allow separation between REEs [29].…”

Section: Introductionmentioning

confidence: 99%

Extraction of rare earth elements from waste products of phosphate industry

Soukeur

Szymczyk

Berbar

et al. 2021

Separation and Purification Technology

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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A biosorption-based approach for selective extraction of rare earth elements from coal byproducts

Cited by 73 publications

References 55 publications

Repeated Recovery of Rare Earth Elements Using a Highly Selective and Thermo‐Responsive Genetically Encoded Polypeptide

Repeated Recovery of Rare Earth Elements Using a Highly Selective and Thermo‐Responsive Genetically Encoded Polypeptide

Influence of the Anionic Zinc-Adeninate Metal–Organic Framework Structure on the Luminescent Detection of Rare Earth Ions in Aqueous Streams

Extraction of rare earth elements from waste products of phosphate industry

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