Robust and recyclable sodium carboxymethyl cellulose–ammonium phosphomolybdate composites for cesium removal from wastewater

Zhang, Ningluo; Chen, Shangqing; Hu, Jiayin; Shi, Jing; Guo, Yafei

doi:10.1039/c9ra09803h

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…In 2018, Rethinasabapathy et al [207] synthesized a layered structured multifunctional polyhedral oligomeric silsesquioxane (POSS) modified Fe-aminoclay/CMC composite that exhibited adsorption capacity against radioactive Cs ions as well as methylene blue and chrysoidine dyes (152 mg/g, 438 mg/g, and 791 mg/g, respectively). In the following year, Zhang and his co-workers (2020) [226] fabricated a CMC-based hybrid adsorbent (cross-linked with ammonium phosphomolybdate). They demonstrated its excellent adsorption capacity against radioactive 137 Cs (64.20 mg/g) from nuclear wastewater.…”

Section: Application In the Water Treatment Processmentioning

confidence: 99%

Recent Developments of Carboxymethyl Cellulose

et al. 2021

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Carboxymethyl cellulose (CMC) is one of the most promising cellulose derivatives. Due to its characteristic surface properties, mechanical strength, tunable hydrophilicity, viscous properties, availability and abundance of raw materials, low-cost synthesis process, and likewise many contrasting aspects, it is now widely used in various advanced application fields, for example, food, paper, textile, and pharmaceutical industries, biomedical engineering, wastewater treatment, energy production, and storage energy production, and storage and so on. Many research articles have been reported on CMC, depending on their sources and application fields. Thus, a comprehensive and well-organized review is in great demand that can provide an up-to-date and in-depth review on CMC. Herein, this review aims to provide compact information of the synthesis to the advanced applications of this material in various fields. Finally, this article covers the insights of future CMC research that could guide researchers working in this prominent field.

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Section: Application In the Water Treatment Processmentioning

confidence: 99%

Recent Developments of Carboxymethyl Cellulose

et al. 2021

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“…The absence of CC stretching bands at 1636 and 813 cm –1 shows successful polymerization in the gels. The figure also shows the FTIR spectra of the AMP powder, wherein the characteristic peaks at 1068, 962, 869, and 785 cm –1 correspond to the P–O, Mo–O, and Mo–O–Mo modes in the polyhedral network of AMP, implying the presence of the Keggin structure of [PMo 12 O 40 ] 3– . , As seen from the figure, while these characteristic signatures are absent in the unmodified (poly(BMEP) and poly(BMEP-AA)) gels, they are present in the modified polymer gels (poly(BMEP)-AMP and poly(BMEP-AA)-AMP), confirming the successful formation of Keggin structure in the modified polymer gels. The presence of NH 4 + in the modified gels is confirmed by the broad peak at 3200 cm –1 (N–H stretching) and the peak at 1400 cm –1 (N–H flexural).…”

Section: Resultsmentioning

confidence: 91%

Selective and Fast Separation of Cesium Ions by In Situ Synthesized Ammonium Molybdophosphate-Like Moieties in a Polymer Gel

Mhatre

Agarwal

Kumar

et al. 2022

ACS Appl. Polym. Mater.

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The objective of the present study is to develop a selective and fast separation media for cesium ions for nuclear fission studies. Here, ammonium molybdophosphate (AMP)-like moieties have been synthesized in situ in a polymer gel with bis[2-(methacryloyloxy)ethyl] phosphate as the monomer. Two types of ethyl] phosphate) and poly (bis[2-(methacryloyloxy)ethyl] phosphate-co-acrylic acid), have been prepared using in situ UV polymerization and characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and Raman spectroscopy. The successful formation of the Keggin structure of [PMo 12 O 40 ] 3− in the modified gels has been confirmed by the presence of its distinctive spectral signatures. The AMP-modified gels have been shown to extract Cs + at all of the studied acid concentrations (0.5−8 mol L −1 ) and are found to be selective for Cs + in the presence of other fission products (Ba 2+ , Eu 3+ , Ce 3+ ) and even in the presence of bulk lead nitrate. A selectivity ratio as high as ∼47 for cesium ion with respect to other fission products has been obtained. The kinetics of Cs + ion uptake has been observed to be fast with >90% uptake in ∼8 s, which is almost two orders of magnitude faster than the Cs + adsorbents/extraction methods reported so far to the best of our knowledge. This fast kinetics can be attributed to the hydrophilic and porous nature of the synthesized polymer gel. The AMPmodified gels were successfully tested for the selective and fast separation of short-lived cesium isotopes produced in neutroninduced fission of 235 U and allowed us to experimentally determine the half-life of one of the short-lived isotope of cesium, i.e., 140 Cs, which was found to be in excellent agreement with the literature-reported value (t 1/2 = 63.7 s). This is a significant improvement over previous studies and can have a variety of interesting applications not only in nuclear physics studies but also for the separation processes where Cs + needs to be separated in a minimum time scale.

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“…NH 4 + can be exchanged with the Pb 2+ ions adsorbed on AMP by using a 1.0 M NH 4 Cl solution. 32,33 Therefore, 50 mg of used sorbent was treated with 1.0 M NH 4 Cl solution (50 mL) for 2 h with magnetic stirring at room temperature. Then, the regenerated sorbent was activated by washing with hot (80 °C) 0.1 M HCl three times.…”

Section: Resultsmentioning

confidence: 99%

“…30 It shows high selectivity for Cs + , good recovery (495%) and a distribution coefficient (K d ) of about 104 mL g À1 of under low or neutral pH conditions; however, metal ions can easily be recovered from the APM-based sorbent by dissolving it in alkali solutions such as NH 4 OH or NH 4 Cl. [31][32][33] In the last few years, APM has also been extensively investigated for electrocatalysts, 34,35 dielectric materials, 36 the removal of cationic dyes from wastewater, 37,38 the catalytic desulfurization of diesel fuel, 39 photocatalysts 40 and even nanomaterial synthesis. 41,42 The ion exchange capacity of APM to form Cs 2 NH 4 PMoO 40 is approximately 1.0 mmol g À1 , and the ion exchange mechanism is an isomorphous exchange of ammonium ions with Cs ions, as reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Efficient lead sorption by ammonium phosphomolybdate: experimental and density functional theory (DFT) studies

Anjum,

Iqbal,

Toba

et al. 2023

New J. Chem.

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Robust and recyclable sodium carboxymethyl cellulose–ammonium phosphomolybdate composites for cesium removal from wastewater

Abstract: A novel, facilely prepared, recyclable sodium carboxymethyl cellulose–ammonium phosphomolybdate composite (CMC–AMP) was synthesized by chemical cross-linking and used for Cs+ removal.

Cited by 11 publications

References 37 publications

Recent Developments of Carboxymethyl Cellulose

Recent Developments of Carboxymethyl Cellulose

Selective and Fast Separation of Cesium Ions by In Situ Synthesized Ammonium Molybdophosphate-Like Moieties in a Polymer Gel

Efficient lead sorption by ammonium phosphomolybdate: experimental and density functional theory (DFT) studies

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