Grafting of arginine and glutamic acid onto cellulose for enhanced uranyl sorption

El-Bohy, Mina N.; Abdel‐Monem, Yasser K.; Rabie, K.A.; Farag, Nagdy M.; Mahfouz, Mohammad G.; Galhoum, Ahmed A.; Guibal, Eric

doi:10.1007/s10570-017-1193-1

Cited by 36 publications

(19 citation statements)

References 68 publications

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“…Chelating resins are polymers bearing specific reactive groups that chelate metal ions. These chelating properties roughly obey the Hard and Soft Acid Base theory (HSAB) developed by Pearson [3][4][5]10,13]. Uranium is considered a hard acid that shows a higher affinity toward hard bases; therefore, chelating agents bearing O, N, and P groups are highly effective for the selective sorption of uranium ions (high capacity, selective separation) [2][3][4][5]10,14,15].…”

Section: Characterization Of Materialsmentioning

confidence: 73%

“…Schematic route for the synthesis of α-aminophosphonatesbased sorbents. mesoporous silica, metal-organic frameworks) [1,2,12], organic polymers (i.e., resins, cellulose, chitosan) [3][4][5]10], and carbonaceous materials (i.e., activated carbon, carbon nanotubes, graphene oxides) [4,5]. Chelating resins are polymers bearing specific reactive groups that chelate metal ions.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

“…Solvent extraction is recognized as an effective and competitive method for the extraction of uranium from concentrated solutions [6,7]. For more diluted effluents, sorption processes are more appropriate, including biosorbents [8,9], ion-exchange and chelating resins [1,[3][4][5]10], extractant-impregnated resins [11] because of fast kinetics, environmentally friendliness, good selectivity, high efficiency and reusability.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of α-aminophosphonate based sorbents – Influence of inserted groups (carboxylic vs. amine) on uranyl sorption

Rashad

Elsayed

Galhoum

et al. 2021

Chemical Engineering Journal

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A one-pot synthesis procedure is designed for preparing three α-aminophosphonates (R-H, R-COOH, and R-NH 2 ); through the reaction of amine precursors (aniline, anthranilic or o-phenylene diamine, respectively) with salicylaldehyde and triphenylphosphite, under controlled conditions. These materials are first characterized by elemental analysis, FTIR, 1 H NMR, 31 P NMR, BET, DLS, pH zpc , TGA and titration. In a second step, the sorption properties are compared for U(VI) recovery from mildly acidic solutions. At the optimum pH (i.e., pH 4) the sorbents can be ranked according the series: R-H (1.057 mmol U g − 1 ) > R-NH 2 (0.746 mmol U g − 1 ) > R-COOH (0.533 mmol U g − 1 ). The isotherms are fitted by the Langmuir equation. Uranium uptake is relatively fast: under selected experimental conditions, the equilibrium is reached within 90 min of contact. The kinetic profiles are indistinctly fitted by the model of resistance to intraparticle diffusion and the pseudo-first order rate equation.The study of sorption thermodynamics shows substantial changes between the sorbents: uranyl uptake is endothermic with R-H and R-NH 2 sorbents, while the reaction is exothermic with R-COOH sorbent. The diversity in functional groups and the speciation of uranyl in sulfuric acid solutions induce metal-binding through a combination of chelation and anion-exchange mechanisms (in function of pH). Sodium bicarbonate solutions achieve complete desorption of uranium from loaded-sorbents; the resins can be recycled for a minimum of 4-5 cycles with limited loss in efficiencies. The successful application of these resins for uranium recovery from acidic ore leachates demonstrates their promising properties for valorization of low-grade ores.

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Section: Characterization Of Materialsmentioning

confidence: 73%

Section: Characterization Of Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of α-aminophosphonate based sorbents – Influence of inserted groups (carboxylic vs. amine) on uranyl sorption

Rashad

Elsayed

Galhoum

et al. 2021

Chemical Engineering Journal

Self Cite

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“…The dissociation constant for the α-carboxyl group of glutamic acid is 2.19, a value in between that of oxalic (1.4) and malic (3.51) acids, while the γ-carboxyl is similar to that of oxalic acid (4.25 vs. 4.4) but lower than that of malic acid (5.03). These properties probably make glutamic acid a more versatile chelator than the other shorter-chain organic acids such as oxalic or malic acids [71]. However, its key position in the nitrogen assimilation pathway probably requires an excess of carbon to be spared as a defense molecule against heavy metal toxicity.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Fungal Endophytes Isolated from the Metal Hyperaccumulator Plant Vachellia farnesiana Growing in Mine Tailings

et al. 2020

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Heavy metal pollution has become an environmental and health problem worldwide. With the aim of finding novel strategies for metal bioremediation, endophytic fungi from the heavy metal hyperaccumulator plant Vachellia farnesiana were isolated and characterized. The plants were growing in mine tailings, rich in Zn, Pb, and Cu. Morphological and phylogenetic analyses indicated that the fungal strains belonged to Neocosmospora and Aspergillus genera. The Neocosmospora isolate belongs to the Fusarium solani species complex (FSSC) that groups phytopathogen species. However, in this case the plants from which it was isolated did not show any signs of disease. Both fungal strains were able to remove significant amounts of heavy metals from liquid cultures, either in a mixture of the three metals or each metal in a single culture. In response to lead exposure, the Neocosmospora sp. strain secreted specific novel phenolic compounds other than anthraquinones or naphtoquinones, which have been described in similar situations. The Aspergillus sp. dropped the pH in the medium. High-performance liquid chromatography determinations indicated that this strain secreted mainly glutamic acid in response to lead, a novel mechanism, which has not been reported elsewhere. Malic and succinic acids were also produced in response to lead exposure. Possibly, glutamic and succinic acids (synthesized in the Krebs cycle) can be used to cope with metal toxicity due to the plant providing photosynthates to the fungus. These fungi showed the potential to be used for bioremediation or restoration of metal-polluted environments.

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“…Different types of adsorbents have been successfully used for uranium removal from aqueous solutions, including natural polymers 16,17 , inorganic compounds 18,19 , carbon nanomaterials 20,21 , metal-organic frameworks 22,23 and biomass 24,25 . The economy of the adsorbents used is of great importance to reduce wastewater treatment costs.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a magnetic reduced-graphene oxide/tea waste composite for high-efficiency sorption of uranium

Yang

Zhu

et al. 2019

Sci Rep

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The preparation and application of adsorptive materials with low cost and high-efficiency recovery of uranium from nuclear waste is necessary for the development of sustainable, clean energy resources and to avoid nuclear pollution. In this work, the capacity of tea waste and tea waste hybrids as inexpensive sorbents for uranium removal from water solutions was investigated. Composites of graphene oxide (GO) and tea waste (TW) exhibited a promising adsorption performance for uranium from aqueous solutions. The composites GOTW and magnetic rGO/Fe 3 O 4 /TW show high adsorption capacities ( Q m (TW) = 91.72 mg/g, Q m (GOTW) = 111.61 mg/g and Q m (rGO/Fe3O4/TW) = 104.95 mg/g) and removal rates (~99%) for U(VI). The equilibrium sorption of the adsorbents fitted well to the Langmuir model, and the sorption rate fitted well to a pseudo-second-order kinetic model. The thermodynamic parameters indicated that sorption was spontaneous and favourable. The prepared adsorbents were used for the removal of uranium from real water samples as well. The results revealed that GOTW and rGO/Fe 3 O 4 /TW can be used to remediate nuclear industrial effluent as a potential adsorbent.

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Grafting of arginine and glutamic acid onto cellulose for enhanced uranyl sorption

Cited by 36 publications

References 68 publications

Synthesis of α-aminophosphonate based sorbents – Influence of inserted groups (carboxylic vs. amine) on uranyl sorption

Synthesis of α-aminophosphonate based sorbents – Influence of inserted groups (carboxylic vs. amine) on uranyl sorption

Characterization of Fungal Endophytes Isolated from the Metal Hyperaccumulator Plant Vachellia farnesiana Growing in Mine Tailings

Preparation of a magnetic reduced-graphene oxide/tea waste composite for high-efficiency sorption of uranium

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