A Promising Superabsorbent Nanocomposite Based on Grafting Biopolymer/Nanomagnetite for Capture of 134Cs, 85Sr and 60Co Radionuclides

El‐saied, Hend Al‐aidy; El-Din, Ahmed M. Shahr; Masry, B. A.; Ibrahim, Ahmed M.

doi:10.1007/s10924-020-01720-z

Cited by 31 publications

(7 citation statements)

References 47 publications

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“…The inorganic material is incorporated within the gel matrix to enhance the mechanical properties during swelling and to increase the active surface area. The two specified materials have been proved as effective candidates for heavy metal removal [39,40] 2I. It is apparent upon comparing these spectra, it is evident that new bands are formed at certain regions which confirms the linking of guar gum with chitosan.…”

Section: Results and Discussion: 31 Mechanism Of Preparation Of Green...mentioning

confidence: 93%

“…On the other hand, super absorbent green hydrogels were extensively applied in different applications where water absorption or retention is important such as pharmaceutical and wastewater remediation [32][33][34][35]. Moreover, hydrogel composites were prepared by incorporation of different inorganic supports into the hydrogel matrix such as nanomagnetite [36], montmorillonite [37], graphene oxide [38] and silicates [39]. The objective of this work is to introduce superabsorbent green hydrogel matrix composed of guar gum /chitosan crosslinked with glutaraldehyde and fabricated with different weight ratios of Talc powder (di metal oxide inorganic core (Mg3Si4O10(OH)2) as sorbents for some toxic pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and investigation of green hydrogels for simultaneous removal of mercuric cations and methylene blue from aqueous solutions

Keshawy

Kamal

Abdel-Raouf³

2021

Egypt. J. Chem.

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A green composite comprised of guar gum enforced with different weight ratios (1, 2, and 3%) of talc powder (TP) as inorganic support. This group of green sorbent materials was introduced to remove methylene blue and toxic chemical modification was proved by the IR spectroscopy and the prepared hydrogels were investigated by X (XRD) for their crystallinity. The thermal properties of the green sorbents wer (TGA). Scanning electron microscopy (SEM) and Atomic force microscopy (AFM) were used to investigate the surface features and surface topography of the optimum adsorbent before and after adsorption respective were conducted as functions versus the contact time and temperature. Moreover, isothermal, thermodynamic adsorption, and kinetic theoretical constants were calculated. Results revealed that guar gum/chitosan grafted nanocomposite enhanced the removal of methylene blue (MB) up to (79%) and metal ion discharge (92.11%). The maximum cationic dye MB and Hg +2 ions adsorption efficiencies were reached at temperature (318 K). For both MB dye and Hg 2nd -order model has successfully defined the adsorption kinetics and the Langmuir model could exactly explain adsorption isotherms for both Hg +2 and MB dye. Hg 57.992 mg/g respectively on GG/CH/GA/T2 at 25 °C; indicating an efficient separation of adsorbent from aqueous solutions for both cationic dyes and toxic heavy metals.

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Section: Results and Discussion: 31 Mechanism Of Preparation Of Green...mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Synthesis and investigation of green hydrogels for simultaneous removal of mercuric cations and methylene blue from aqueous solutions

Keshawy

Kamal

Abdel-Raouf³

2021

Egypt. J. Chem.

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“…This saturation can be ascribed to the interactions between the adsorbent active sites and these metal ions. [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

Modeling and equilibrium studies on the recovery of praseodymium (III), dysprosium (III) and yttrium (III) using acidic cation exchange resin

2022

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In this research, the possibility of using hydrogenated Dowex 50WX8 resin for the recovery and separation of Pr(III), Dy(III) and Y(III) from aqueous nitrate solutions were carried out. Dowex 50WX8 adsorbent was characterized before and after sorption of metal ions using Fourier-transform infrared spectroscopy (FT-IR), Scanning Electron Microscope (SEM) and Energy Dispersive X-Ray Analysis (EDX) techniques. Sorption parameters were studied which included contact time, initial metal ion concentration, nitric acid concentration and adsorbent dose. The equilibrium time has been set at about 15.0 min. The experimental results showed that the sorption efficiency of metal ions under the investigated conditions decreased with increasing nitric acid concentration from 0.50 to 3.0 M. The maximum sorption capacity was found to be 30.0, 50.0 and 60.0 mg/g for Pr(III), DY(III) and Y(III), respectively. The desorption of Pr(III) from the loaded resin was achieved with 1.0 M citric acid at pH = 3 and found to be 58.0%. On the other hand, the maximum desorption of Dy(III) and Y(III) were achieved with 1.0 M nitric acid and 1.0 M ammonium carbonate, respectively. The sorption isotherm results indicated that Pr(III) and Y(II) fitted with nonlinear Langmuir isotherm model with regression factors 0.995 and 0.978, respectively; while, Dy(III) fitted with nonlinear Toth isotherm model with R2 = 0.966. A Flow sheet which summarizes the sorption and desorption processes of Pr(III), DY(III) and Y(III) using Dowex 50WX8 from nitric acid solution under the optimum conditions is also given.

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“…Similar concepts have been extended to PB immobilization onto carbon nanotubes [ 23 ], activated charcoal [ 24 ], polymer [ 25 ], or biopolymers [ 22 , 23 , 26 ]. Strontium removal was investigated using a wide range of bio-sorbents such as agriculture by-products [ 27 ], living microorganisms [ 28 ], yeast [ 29 ], and functionalized biopolymers [ 30 , 31 ]. Algal-based materials and sub-products have retained great attention for their potential to bind organic [ 32 ] and inorganic [ 9 ] contaminants.…”

Section: Introductionmentioning

confidence: 99%

New Process for the Sulfonation of Algal/PEI Biosorbent for Enhancing Sr(II) Removal from Aqueous Solutions—Application to Seawater

Hamza

Guibal²,

Althumayri

et al. 2022

Molecules

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Sulfonic resins are highly efficient cation exchangers widely used for metal removal from aqueous solutions. Herein, a new sulfonation process is designed for the sulfonation of algal/PEI composite (A*PEI, by reaction with 2-propylene-1-sulfonic acid and hydroxylamine-O-sulfonic acid). The new sulfonated functionalized sorbent (SA*PEI) is successfully tested in batch systems for strontium recovery first in synthetic solutions before investigating with multi-component solutions and final validation with seawater samples. The chemical modification of A*PEI triples the sorption capacity for Sr(II) at pH 4 with a removal rate of up to 7% and 58% for A*PEI and SA*PEI, respectively (with SD: 0.67 g L−1). FTIR shows the strong contribution of sulfonate groups for the functionalized sorbent (in addition to amine and carboxylic groups from the support). The sorption is endothermic (increase in sorption with temperature). The sulfonation improves thermal stability and slightly enhances textural properties. This may explain the fast kinetics (which are controlled by the pseudo-first-order rate equation). The sulfonated sorbent shows a remarkable preference for Sr(II) over competitor mono-, di-, and tri-valent metal cations. Sorption properties are weakly influenced by the excess of NaCl; this can explain the outstanding sorption properties in the treatment of seawater samples. In addition, the sulfonated sorbent shows excellent stability at recycling (for at least 5 cycles), with a loss in capacity of around 2.2%. These preliminary results show the remarkable efficiency of the sorbent for Sr(II) removal from complex solutions (this could open perspectives for the treatment of contaminated seawater samples).

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A Promising Superabsorbent Nanocomposite Based on Grafting Biopolymer/Nanomagnetite for Capture of 134Cs, 85Sr and 60Co Radionuclides

Cited by 31 publications

References 47 publications

Synthesis and investigation of green hydrogels for simultaneous removal of mercuric cations and methylene blue from aqueous solutions

Synthesis and investigation of green hydrogels for simultaneous removal of mercuric cations and methylene blue from aqueous solutions

Modeling and equilibrium studies on the recovery of praseodymium (III), dysprosium (III) and yttrium (III) using acidic cation exchange resin

New Process for the Sulfonation of Algal/PEI Biosorbent for Enhancing Sr(II) Removal from Aqueous Solutions—Application to Seawater

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