Preparation and characterization of titanium tungstophosphate immobilized on mesoporous silica SBA-15 as a new inorganic composite ion exchanger for the removal of lanthanum from aqueous solution

Ahmadi, Monavar; Yavari, R.; Yeganeh-Faal, Ali; Aghayan, H.

doi:10.1007/s10967-016-4748-y

Cited by 8 publications

(2 citation statements)

References 44 publications

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“…To compare the as-prepared IIPs and previously reported adsorbents for La(III) removal, Table S4 summarizes different types of materials, including the other IIP-based adsorbents, hybrid silica composites, commercial titanium dioxide, and functionalized metal organic frameworks. ,, For three prior IIP-based adsorbents (i.e., La-IIP-Azo, La-IIP-Schiff base, and La-IIP-CS/PVP), their adsorption capacities of La(III) are slightly lower than those of our IIPs. , Compared to other three previous adsorbents, IIP-AM and IIP-MAA still exhibit the superior adsorption capacities. Therefore, we confirm that the synthesized IIP-based adsorbents demonstrate the outstanding adsorption performances.…”

Section: Resultsmentioning

confidence: 98%

Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Zhang

Liu

Guo

et al. 2023

ACS Appl. Polym. Mater.

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Selective recognition and separation of rare-earth elements (REEs) is considered a real challenge for the RE industry. In this work, two dual-site ion-imprinted polymers (IIP-AM and IIP-MAA) were synthesized via a radical copolymerization method for the removal of La(III) from aqueous solutions. The structures of samples were characterized and confirmed with various kinds of techniques, including IR, X-ray diffraction, field emission scanning electron microscopy, Brunauer–Emmett–Teller, thermogravimetry analysis, and X-ray photoelectron spectroscopy (XPS). Adsorption studies reveal that the pseudo-second-order kinetic model and the Langmuir isotherm model were well-fitted with the adsorption of La(III), showing high adsorption capacities of 45.65 and 50.05 mg/g for IIP-AM and IIP-MAA, respectively, after 120 min at pH = 5.5 and 25 °C. Impressively, the fabricated IIPs possess remarkable selectivity between La(III) and other REEs, as well as excellent reusability after five successive adsorption–regeneration cycles with less than 9% reduction of capacities. The adsorption mechanism indicates that the surface complexation and electrostatic attraction contribute to the adsorption of La(III) based on the characterization analysis of XPS, elemental mapping, and energy-dispersive spectrometry, as well as density functional theory calculations. Accordingly, these samples with tailored ion-imprinted cavities and abundant active O sites entirely exhibit the potentials for the selective recovery of REEs from aqueous solutions.

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Section: Resultsmentioning

confidence: 98%

Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Zhang

Liu

Guo

et al. 2023

ACS Appl. Polym. Mater.

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“…13 Titanium arsenosilicate was prepared by Varshney et al 14 Ahmad et al synthesized Titanium tungstophosphate immobilized on silica and employed it for the removal of lanthanum. 15 Yaveri et al synthesized and studied analytical application of Titanium (IV) molybdophosphate. 16 A lead selective exchanger named Titanium aluminum silicate was assembled by Sun et al 17 Kuznicki et al synthesized amorphous heteropolyacid salt named titanium phosphosilicate.…”

Section: Introductionmentioning

confidence: 99%

Novel Heteropolyacid Salt: Titanium (Iv) Molybdotungstate

Sharma¹,

Sharma²,

Dogra³

2020

RJC

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The present investigation describes the geometry of an original compound, Titanium (IV) molybdotungstate [TiMoW] prepared by using the ion-exchange route. To elaborate the structural aspects various analytical techniques were employed. The amorphous behavior of the compound was established using XRD. Infrared spectroscopy was used to assign dynamic sites responsible for acidic characteristics of the sample. SEM/EDS has been used to describe the composition of elements present in the prepared sample. Thermogravimetric techniques indicated the weight loss rate and helped in ascertaining the number of water molecules. Thereafter, the derived structure furnished a geometry of heteropolyacid salt, embedded with acidic and ion exchange characteristics.

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Studies on the feasibility of using a novel phosphonate resin for the separation of U(VI), La(III) and Pr(III) from aqueous solutions

Bendiaf

Abderrahim

Villemin

et al. 2017

J Radioanal Nucl Chem

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Preparation and characterization of titanium tungstophosphate immobilized on mesoporous silica SBA-15 as a new inorganic composite ion exchanger for the removal of lanthanum from aqueous solution

Cited by 8 publications

References 44 publications

Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Novel Heteropolyacid Salt: Titanium (Iv) Molybdotungstate

Studies on the feasibility of using a novel phosphonate resin for the separation of U(VI), La(III) and Pr(III) from aqueous solutions

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