Adsorption and separation of Re(VII) using trimethylamine-functionalized strong base anion exchange resin
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Adsorption and separation of Re(VII) using trimethylamine‑functionalized strong base anion exchange resin Fuping Liu1 · Rong Hua1 · Feng Zhang1 · Heng Liu2 · Chuan‑Pin Lee1 · Hesheng Liu1 · Bin Xu1 Received: 28 April 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract A new strong base anion exchange resin (LSL-1) was synthesized by grafting trimethylamine groups onto polystyrenedivinylbenzene microspheres and used for the selective recovery of Re(VII) from U(VI)-containing effluent. The morphology and structural properties of LSL-1 were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The adsorption mechanism is discussed. In both batch and column experiments, LSL-1 showed excellent enrichment capacity for Re(VII). This study demonstrates a new approach for the separation and recovery of Re(VII) from U(VI)-containing effluent by using amino-modified polystyrene-divinylbenzene microspheres. Keywords Trimethylamine-functionalization · Adsorption · Rhenium(VII) · Resin
Introduction Rhenium, a rare and valuable metal, is been widely used in high-end technologies, including those in the metallurgical, chemical, petrochemical, defense, and space industries [1, 2]. Rhenium does not occur naturally and no mineable ore has been found [3]. It occurs in molybdenite, copper sulfide ores, and uranium. Because of its high value, the recovery of rhenium from effluent has economic and environmental benefits [4]. Numerous techniques have been adopted to recover Re(VII), including ion exchange, precipitation, adsorption, and solvent extraction [5–9]. Ion exchange is widely used in the recovery of Re(VII) because of its simple technology, convenient operation, and relatively little harm to the environment. In solution, rhenium is usually present in a wide pH range as perrhenate anions ( ReO4−), which exhibits high affinity to functionalized resins [10]. Strong base anion exchange resins have been extensively studied because of their excellent adsorption selectivity for rhenium. José et al. * Rong Hua [email protected] 1
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China
Sunresin New Materials Co. Ltd, Xi’An 710000, Shanxi, China
2
[11] reported a quaternary group was successfully grafted onto magnetite nanoparticles to adsorb rhenium with maximum loading capacities of 38 mg g−1 at pH 3. Min et al. [12] separated Re(VII) in the form of perrhenate from Mo(VI) using N-methylimidazolium functionalized strong basic anion exchange resin. Lan et al. [13] used the gel-type resin 201 × 7 for the recovery of Re(VII) from a molybdenite lixivium. Fathi et al. [14] investigated the mutual interference effects of Mo ions on Re adsorption capacity indicated that due to trend of molybdenum ions for occupying vacant sites on adsorbent, always the adsorption of perrhenate ions is suppressed. However, selective separation of rhenium from uranium solution using a strong base anion e
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