Insight into chitosan/mesoporous silica nanocomposites as eco-friendly adsorbent for enhanced retention of U (VI) and Sr (II) from aqueous solutions and real water

Abukhadra, Mostafa R.; Eid, Mohamed Hamdy; El-Meligy, Mohammed A.; Sharaf, Mohamed; Soliman, Ahmed T.

doi:10.1016/j.ijbiomac.2021.01.136

Cited by 26 publications

(6 citation statements)

References 55 publications

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“…This suggested a dominant impact on physisorption mechanisms during the uptake of As (V) by the addressed structures [45,46]. However, the estimated significant fitting degrees with the assumption of the P.S model demonstrated a considerable effect on the chemisorption mechanisms that might be related strongly to the formation of chemical complexes, or the ion exchange processes with exchangeable ions of bentonite [19].…”

Section: Kinetic Modelingmentioning

confidence: 91%

“…Recently, the heterogeneous and multifunctional synthetic structures of organic and inorganic components were investigated as very effective adsorbents for both metal ions and dissolved organic chemicals [17,18]. The clay-based hybrid structures with organic polymers and metal oxides, especially bentonite-based composites, have been introduced in more recent years as the best multifunction structures for the retention of toxic metal ions from water supplies [19,20]. Bentonite is a highly available smectite-bearing natural material and has significant adsorption properties, either as a single-phase or as an integrated component in composite [21].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

et al. 2022

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A green ZnO@polynaniline/bentonite composite (G.Zn@PN/BE) was synthesized as an enhanced adsorbent for As (V) ions. Its adsorption properties were assessed in comparison with the integrated components of bentonite (BE) and polyaniline/bentonite (PN/BE) composites. The G.Zn@PN/BE composite achieved an As (V) retention capacity (213 mg/g) higher than BE (72.7 mg/g) and PN/BE (119.8 mg/g). The enhanced capacity of G.Zn@PN/BE was studied using classic (Langmuir) and advanced equilibrium (monolayer model of one energy) models. Considering the steric properties, the structure of G.Zn@PN/BE demonstrated a higher density of active sites (Nm = 109.8 (20 °C), 108.9 (30 °C), and 67.8 mg/g (40 °C)) than BE and PN/BE. This declared the effect of the integration process in inducing the retention capacity by increasing the quantities of the active sites. The number of adsorbed As (V) ions per site (1.76 up to 2.13) signifies the retention of two or three ions per site by a multi-ionic mechanism. The adsorption energies (from −3.07 to −3.26 kJ/mol) suggested physical retention mechanisms (hydrogen bonding and dipole bonding forces). The adsorption energy, internal energy, and free enthalpy reflected the exothermic, feasible, and spontaneous nature of the retention process. The structure is of significant As (V) uptake capacity in the existence of competitive anions or metal ions.

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Section: Kinetic Modelingmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

et al. 2022

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“…[165] Abukhadra and group demonstrated the selective removal of radioactive metal ions, U 6 + and Sr 2 + ions from real water, with an integration of CS chains and MCM-48 mesoporous silica. [166] Amine modified SBA-15 has also been incorporated into the polymer matrix of a thin film nanocomposite (TFC) forward osmosis membrane. In comparison to the pristine TFC, the hydrophilic mesoporous nanofiller not only improved the composite's hydrophilicity, but also produced "ultrafast nanochannels" for water transport, resulting in greater water flux and selectivity.…”

Section: Environmental Remediationmentioning

confidence: 99%

“…In another study amine‐mesoporous silica/poly(m‐aminothiophenol) nanocomposite was inversely vulcanized to vinylic‐potato starch utilizing Sulfur for the efficient removal of Hg 2+ by adsorption and the Hg 2+ adsorbed composite was employed as a catalyst for acetophenone synthesis with 89 % yield [165] . Abukhadra and group demonstrated the selective removal of radioactive metal ions, U 6+ and Sr 2+ ions from real water, with an integration of CS chains and MCM‐48 mesoporous silica [166] . Amine modified SBA‐15 has also been incorporated into the polymer matrix of a thin film nanocomposite (TFC) forward osmosis membrane.…”

Section: Contemporary Multidisciplinary Applications Of Mesoporous Si...mentioning

confidence: 99%

Contemporary, Multidisciplinary Roles of Mesoporous Silica Nanohybrids/Nanocomposites

2022

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Number of nanomaterials have been produced as a result of the growth of nanoscience and nanotechnology, and have found applications in interdisciplinary sectors in which nanotechnology has now become indispensable. Owing to the better properties over individual nanomaterials, the hybrid materials have been broadly studied. Mesoporous silica nanoparticles (MS Nps) have been employed as a matrix in the synthesis of nanohybrids and as a filler in nanocomposites due to its high porosity, adjustable pore volume, facile functionalization, thermal and chemical stability and less toxicity. So far, versatile MS Nps hybrids and composites have been synthesized as advanced smart materials to be applied across industrial and biological sectors. This review study gives an up‐to‐date viewpoint on the synthesis and uses of mesoporous silica nanohybrids and nanocomposites particularly in biomedical sectors, agricultural and food industries and in environmental remediation followed by future insights and research directions of MS Np hybrids and composites.

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“…Finally, adsorption is an appealing separation method as it reduces solvent consumption and exposure, and process time [4]. Different adsorbents have been used for uranium adsorption from different aquatic media, such as graphene (loaded with TBP) [3], glycidyl methacrylate (modified by amino groups) [4], Amidoximated cellulose [5], and chitosan/silica [6].…”

Section: Introductionmentioning

confidence: 99%

A facile and cost-effective adsorbent derived from industrial iron-making slag for uranium removal

Ibrahim

El‐Sheshtawy

El‐Magied

et al. 2021

J Radioanal Nucl Chem

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The Al 2 O 3 -SiO 2 -BFS (AS-BFS) solid adsorbent was developed from blast furnace slag (BFS). The potentiality of the AS-BFS for uranium ion removal from an aqueous medium, via the batch method, was explored and disused in terms of dynamic and isothermal properties. The sorbent exhibited good reusability, a high capacity for uranium ions, and a good specific surface area. The results showed that the sorbent evacuated uranium at about 88.5 mg/g. The sorbent represents a promising waste-derived substitute for other sorbents for water treatment.

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Insight into chitosan/mesoporous silica nanocomposites as eco-friendly adsorbent for enhanced retention of U (VI) and Sr (II) from aqueous solutions and real water

Cited by 26 publications

References 55 publications

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

Contemporary, Multidisciplinary Roles of Mesoporous Silica Nanohybrids/Nanocomposites

A facile and cost-effective adsorbent derived from industrial iron-making slag for uranium removal

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