Synthesize of Poly (acrylamide-co-itaconic/TiO2) Nanocomposite for Ce(III) Sorption from Monazite Leachate

Maree, R.M.; El-Shazly, E. A. A.; Allan, K. F.

doi:10.1007/s10924-021-02320-1

Cited by 8 publications

(5 citation statements)

References 56 publications

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“…Asymmetric and symmetric stretching of carbonyl groups in the carboxylate group is designated to peaks at 1535 and 1392 cm –1 , respectively . The peak at 1658 cm –1 signifies amide stretching, while the peak at 1209 cm –1 is attributed to −NH bending, likely due to the presence of MBAm and acrylamide moieties in NGs. , …”

Section: Resultsmentioning

confidence: 99%

“…63 The peak at 1658 cm −1 signifies amide stretching, while the peak at 1209 cm −1 is attributed to −NH bending, likely due to the presence of MBAm and acrylamide moieties in NGs. 64,65 To further confirm the functional groups, an XPS study is performed. The XPS spectra of C 1s, O 1s, and N 1s for IAc, AAm, and MBAm are given in Supporting Information in Figure S5.…”

Section: Synthesis and Characterization Of Ngsmentioning

confidence: 99%

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pH-Responsive, Reactive Oxygen Species Scavenging and Highly Swellable Nanogel for Colon-Targeted Oral Drug Delivery

Kumawat,

Karmakar,

Ghoroi

2024

ACS Appl. Nano Mater.

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In the realm of colon-based drug delivery, developing a pHresponsive nanocarrier that exhibits significant intrinsic reactive oxygen species (ROS) scavenging activity holds great promise. To address this, a nanogel (NG) is synthesized using itaconic acid (IAc) and acrylamide (AAm) monomers in a molar ratio of 1:4 via free radical polymerization. The spherical NG of size 190 ± 15 nm is confirmed by using field emission scanning electron microscopy (FESEM). Dynamic light scattering (DLS) characterization reveals a hydrodynamic diameter and zeta potential of 271 ± 23 nm and −6.9 ± 2.3 mV, respectively. FTIR, XPS, and NMR analyses confirm the presence of multiple functionalities on the NG. Significant improvement in swelling (10 times) at colonic pH (pH 7.4) in contrast to gastric pH (pH 1.2) ensures the pH-responsive behavior of a NG along with five times higher ROS scavenging activity compared to control. As a model drug, doxorubicin (DOX) is employed to investigate release properties and cellular uptake. The NG exhibited drug loading capacity and efficiency of 26 ± 1.2% and 90 ± 1.3%, respectively, with a three times higher DOX release at pH 7.4 than at pH 1.2. Rheology data reveal the superior structural integrity of the doxorubicin loaded nanogel (DNG) compared to the NG. The biocompatibility of the NG is confirmed through MTT, the hemolysis assay, and cell uptake assays on HCT-116 colon cancer cells. The cellular uptake studies have indicated NG-mediated drug release in the colon microenvironment with subsequent passive diffusion of DOX into cells. These findings underscore the capability of the synthesized NG as a vehicle for oral drug delivery to the colon.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Characterization Of Ngsmentioning

confidence: 99%

pH-Responsive, Reactive Oxygen Species Scavenging and Highly Swellable Nanogel for Colon-Targeted Oral Drug Delivery

Kumawat,

Karmakar,

Ghoroi

2024

ACS Appl. Nano Mater.

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“…The average pore diameter of 139.5 nm represents macropore size (> 50 nm). These macropores enhance sorption and desorption efficiencies ( Dakroury et al 2022 ). …”

Section: Resultsmentioning

confidence: 99%

Zirconium preconcentration from zircon raffinate using gamma radiation–induced polymerization of reduced graphene oxide composite

Ali

Abdo

El-Shazly

2023

Environ Sci Pollut Res

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Zirconium is commonly used as a cladding material for nuclear reactors. The purity of the zirconium material seeks to control reactor efficiency. A novel composite of reduced graphene oxide–grafted polyacrylic acid, malic acid, and trioctylamine (rGO-g-PAA-MA/TOA) was prepared using in situ radical polymerization with gamma radiation at a dose of 25 KGy from a 60Co cell to preconcentrate zirconium Zr(IV) from zircon raffinate. Five distinct rGO-g-PAA-MA/TOA composite compositions were created and evaluated. The best composite composition was 62.95% acrylic acid, 15.8% malic acid, and 15.8% trioctylamine. After 60 min, the sorption reaction reached equilibrium at pH 0.35 and 20 °C. The pseudo nth order indicated that the order of the sorption reaction was 1.8476. The Elovich model and Dubinin-Radushkevich model controlled the kinetic mechanism and adsorption isotherm of the sorption reaction, respectively; based on estimated regression plots and quantitatively with three different error functions: coefficient of determination (R2), chi-square statistic (χ2), and corrected Akaike information (AICc). The adsorption capacity of rGO-g-PAA-MA/TOA was 75.06 mg g−1. Exothermic reaction and spontaneous sorption took place. Using 2 M H2SO4, 98% of the zirconium was efficiently desorbed. The separation of contaminated Ti(IV) from desorbed Zr(IV) by raising pH to 2.5 through hydrolysis and ZrO2 formation.

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“…The leaching steps may include acidic [ 13 ], alkaline [ 14 ], or bioleaching solutions [ 6 , 15 ]. Simple precipitation techniques are poorly selective for the treatment of leachates [ 16 , 17 ], and it is generally necessary to couple selective precipitation steps [ 13 , 18 , 19 ] with complementary separation processes, such as solvent extraction [ 20 , 21 , 22 ] or sorption processes [ 23 , 24 ]. Sorption processes are usually preferred to solvent extraction for the treatment of low-concentration effluents.…”

Section: Introductionmentioning

confidence: 99%

“…The following supporting information can be downloaded at: , References [ 23 , 27 , 29 , 33 , 34 , 47 , 48 , 51 , 52 , 68 , 74 , 75 , 76 , 77 , 78 , 79 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 ...…”

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Enhancement of Cerium Sorption onto Urea-Functionalized Magnetite Chitosan Microparticles by Sorbent Sulfonation—Application to Ore Leachate

Hamza

Guibal²,

Abdel‐Rahman

et al. 2022

Molecules

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The recovery of strategic metals such as rare earth elements (REEs) requires the development of new sorbents with high sorption capacities and selectivity. The bi-functionality of sorbents showed a remarkable capacity for the enhancement of binding properties. This work compares the sorption properties of magnetic chitosan (MC, prepared by dispersion of hydrothermally precipitated magnetite microparticles (synthesized through Fe(II)/Fe(III) precursors) into chitosan solution and crosslinking with glutaraldehyde) with those of the urea derivative (MC-UR) and its sulfonated derivative (MC-UR/S) for cerium (as an example of REEs). The sorbents were characterized by FTIR, TGA, elemental analysis, SEM-EDX, TEM, VSM, and titration. In a second step, the effect of pH (optimum at pH 5), the uptake kinetics (fitted by the pseudo-first-order rate equation), the sorption isotherms (modeled by the Langmuir equation) are investigated. The successive modifications of magnetic chitosan increases the maximum sorption capacity from 0.28 to 0.845 and 1.25 mmol Ce g−1 (MC, MC-UR, and MC-UR/S, respectively). The bi-functionalization strongly increases the selectivity of the sorbent for Ce(III) through multi-component equimolar solutions (especially at pH 4). The functionalization notably increases the stability at recycling (for at least 5 cycles), using 0.2 M HCl for the complete desorption of cerium from the loaded sorbent. The bi-functionalized sorbent was successfully tested for the recovery of cerium from pre-treated acidic leachates, recovered from low-grade cerium-bearing Egyptian ore.

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Synthesize of Poly (acrylamide-co-itaconic/TiO2) Nanocomposite for Ce(III) Sorption from Monazite Leachate

Cited by 8 publications

References 56 publications

pH-Responsive, Reactive Oxygen Species Scavenging and Highly Swellable Nanogel for Colon-Targeted Oral Drug Delivery

pH-Responsive, Reactive Oxygen Species Scavenging and Highly Swellable Nanogel for Colon-Targeted Oral Drug Delivery

Zirconium preconcentration from zircon raffinate using gamma radiation–induced polymerization of reduced graphene oxide composite

Enhancement of Cerium Sorption onto Urea-Functionalized Magnetite Chitosan Microparticles by Sorbent Sulfonation—Application to Ore Leachate

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