Terephthalaldehyde–Phenolic Resins as a Solid-Phase Extraction System for the Recovery of Rare-Earth Elements

Auke, Ruth Oye; Arrachart, Guilhem; Tavernier, Romain; David, Ghislain; Pellet‐Rostaing, Stéphane

doi:10.3390/polym14020311

Cited by 11 publications

(7 citation statements)

References 41 publications

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“…With respect to our previous work, [46] substituted thiourea monomers were synthesized via a known synthetic route in two steps, similar to the procedure reported in literature [47] . The resins were also synthesized via alkaline polycondensation of an aldehyde, formaldehyde, with phenolic compounds according to the literature procedures [49,61–63] …”

Section: Methodsmentioning

confidence: 99%

“…[47] The resins were also synthesized via alkaline polycondensation of an aldehyde, formaldehyde, with phenolic compounds according to the literature procedures. [49,[61][62][63] The thiourea phenolic precursors were introduced into a doublenecked round-bottom flask equipped with a condenser and a magnetic stirrer. It was dissolved in an alkaline solution using 1.5 eq of sodium hydroxide or 2 eq of 1,8-diazabicyclo(5.4.0)undec-7-ene (DBU) and 80 eq of water.…”

Section: General Procedures For Resins Synthesismentioning

confidence: 99%

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Thiourea Adsorbent for Efficient Removal of Mercury (II)

El Khoueiry,

Giusti,

Lelong

et al. 2023

ChemistrySelect

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The removal of heavy toxic metals from industrial effluents is extremely important, especially for mercury (Hg), which is classified as a highly toxic even at low concentrations. For this purpose, novel thiourea chelating resins were synthesized as sorbent for Hg (II). Six different polymers of formo‐phenolic types were characterized and evaluated for their chelating properties with respect to Hg (II) extraction. Batch adsorption studies of mercury (II) as a function of pH, initial metal ion concentration, temperature, and time showed that thiourea formo‐phenolic polymers have a good affinity for Hg removal and a high adsorption capacity. Adsorption isotherms (Langmuir and Freundlich) and kinetic models (pseudo‐first and pseudo‐second order) were used to interpret the sorption behavior of the materials. The Langmuir model yielded the best fit with a maximum adsorption capacity of 300 mg/g. Desorption studies were performed with aqueous thiourea solution and showed that the adsorbent is indeed regenerable and can be effectively used for up to three adsorption‐desorption cycles with negligible loss of performance. This study confirmed the potential of thiol‐modified formo‐phenolic resins in sorbent engineering with promising applications in the remediation of mercury‐contaminated water.

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Section: Methodsmentioning

confidence: 99%

Section: General Procedures For Resins Synthesismentioning

confidence: 99%

Thiourea Adsorbent for Efficient Removal of Mercury (II)

El Khoueiry,

Giusti,

Lelong

et al. 2023

ChemistrySelect

Self Cite

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“…Polymeric resins possess remarkable adaptability, as they can be precisely customized through functionalization to exhibit a strong preference for specific REEs [44][45][46]. Their utility extends beyond selectivity to include advantages like ease of regeneration, scalability for various operational scales, and a reduced environmental impact when compared to the more traditional solvent-based extraction methods.…”

Section: Polymeric Resinsmentioning

confidence: 99%

Polymeric Materials for Rare Earth Elements Recovery

Zhang,

Gao

2023

Gels

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Rare earth elements (REEs) play indispensable roles in various advanced technologies, from electronics to renewable energy. However, the heavy global REEs supply and the environmental impact of traditional mining practices have spurred the search for sustainable REEs recovery methods. Polymeric materials have emerged as promising candidates due to their selective adsorption capabilities, versatility, scalability, and regenerability. This paper provides an extensive overview of polymeric materials for REEs recovery, including polymeric resins, polymer membranes, cross-linked polymer networks, and nanocomposite polymers. Each category is examined for its advantages, challenges, and notable developments. Furthermore, we highlight the potential of polymeric materials to contribute to eco-friendly and efficient REEs recovery, while acknowledging the need to address challenges such as selectivity, stability, and scalability. The research in this field actively seeks innovative solutions to reduce reliance on hazardous chemicals and minimize waste generation. As the demand for REEs continues to rise, the development of sustainable REEs recovery technologies remains a critical area of investigation, with the collaboration between researchers and industry experts driving progress in this evolving field.

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“…It shows a capture capacity of 70 mg/g for Eu (III) at pH 4.0. According to researchers, it is a nontoxic resin due to its nonhazardous starting materials [ 33 ]. However, the aldehyde moiety present in this resin could be oxidized to a carboxylic acid, and protonation of hydroxyl groups under the conditions found in mining wastewaters and AMD should be considered because it could change the REE uptake properties.…”

Section: Synthetic Polymeric Materials For Ree Uptakementioning

confidence: 99%

Rare Earth Elements Uptake by Synthetic Polymeric and Cellulose-Based Materials: A Review

Salfate

Sánchez

2022

Polymers

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Contemporary industrial processes and the application of new technologies have increased the demand for rare earth elements (REEs). REEs are critical components for many applications related to semiconductors, luminescent molecules, catalysts, batteries, and so forth. REEs refer to a group of 17 elements that have similar chemical properties. REE mining has increased considerably in the last decade and is starting an REE supply crisis. Recently, the viability of secondary REE sources, such as mining wastewaters and acid mine drainage (AMD), has been considered. A strategy to recover REEs from secondary water-related sources is through the usage of adsorbents and ion exchange materials in preconcentration steps due to their presence in low concentrations. In the search for more sustainable processes, the evaluation of synthetic polymers and natural source materials, such as cellulose-based materials, for REE capture from secondary sources should be considered. In this review, the chemistry, sources, extraction, uses, and environmental impact of REEs are briefly described to finally focus on the study of different adsorption/ion exchange materials and their performance in capturing REEs from water sources, moving from commercially available ion exchange resins to cellulose-based materials.

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Terephthalaldehyde–Phenolic Resins as a Solid-Phase Extraction System for the Recovery of Rare-Earth Elements

Cited by 11 publications

References 41 publications

Thiourea Adsorbent for Efficient Removal of Mercury (II)

Thiourea Adsorbent for Efficient Removal of Mercury (II)

Polymeric Materials for Rare Earth Elements Recovery

Rare Earth Elements Uptake by Synthetic Polymeric and Cellulose-Based Materials: A Review

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