Functionalized aminophosphonate chitosan-magnetic nanocomposites for Cd(II) removal from aqueous solutions: Performance and mechanisms of sorption

Morshedy, Asmaa S.; Galhoum, Ahmed A.; Aleem, Abdel Aleem H. Abdel; El-din, Mohamed T. Shehab; Okaba, Dina M.; Mostafa, Mohsen S.; Mira, Hamed I.; Yang, Zhen; El-Sayed, Ibrahim E.T.

doi:10.1016/j.apsusc.2021.150069

Cited by 33 publications

(19 citation statements)

References 51 publications

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“…In the analysis of the XPS spectrum in Figure 3, we obtained elements: C, N, O, P and Ni. From XPS spectrum was observed that ChitPNi exhibit for phosphorus and Ni ions comparable with the one presented in the literature [40][41][42]. Additionally, the values for the phosphorus, nitrogen and nickel content are given in Figure 3.…”

Section: Adsorbent Characterizationsupporting

confidence: 81%

Chemical Modification of Chitosan for Removal of Pb(II) Ions from Aqueous Solutions

et al. 2021

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Biomacromolecule have a significant contribution to the adsorption of metal ions. Moreover, chitosan is one of the most studied biomacromolecule, which has shown a good performance in the field of wastewater treatment. In this context, a new adsorbent of the aminophosphonic modified chitosan-supported Ni(II) ions type was prepared from the naturally biopolymer, chitosan. In the first step, modified chitosan with aminophosphonic acid groups was prepared using the “one-pot” Kabachnik-Fields reaction. It was characterized by different techniques: FTIR, SEM/EDAX, TGA, and 31P-NMR. In the second step, the modified chitosan with aminophosphonic acid was impregnated with Ni(II) ions using the hydrothermal reaction at different values of pH (5, 6 and 7). The physical-chemical characteristics of final products (modified chitosan carrying aminophosphonic groups and Ni(II) ions) were investigated using FTIR, SEM images, EDAX spectra and thermogravimetric analysis. In this work, the most important objective was the investigation of the adsorbent performance of the chitosan modified with aminophosphonic groups and Ni(II) ions in the process of removing Pb(II) ions from aqueous solutions by studying the effect of pH, contact time, and Pb(II) ions concentration. For removal of Pb(II) ions from the aqueous solution, the batch adsorption method was used.

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Section: Adsorbent Characterizationsupporting

confidence: 81%

Chemical Modification of Chitosan for Removal of Pb(II) Ions from Aqueous Solutions

et al. 2021

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“…It is also highly toxic. The extraction of uranium and the development of nuclear power can produce hazardous and radioactive waste [1][2][3][4][5]. Consequently, uranium separation and recovery are important processes in terms of both uranium resource exploitation and environmental preservation.…”

Section: Introductionmentioning

confidence: 99%

“…As an alternative to traditional synthetic resins, biosorption and biopolymers such as chitosan and cellulose have recently attracted a lot of attention [1][2][3][4][5]. For water remediation, chitosan-based polymers have been widely investigated [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…For water remediation, chitosan-based polymers have been widely investigated [15][16][17]. Chitosan (CT), a reactive biopolymer (amino-polysaccharide obtained by alkaline acetylation of chitin), has received great attention because it is a renewable resource, abundant, and biodegradable [1][2][3][4][5]. CT is a good sorbent for metal ions, and bears hydroxyl and amine reactive functionalities that can be bound in a variety of mechanisms: metal anions are attracted to each other through ion exchange/electrostatic attraction, and metal cations are chelated [1][2][3][4][5], and open up a world of further functionalization.…”

Section: Introductionmentioning

confidence: 99%

“…Nanocomposites are multiphase materials made up of nanometric iron oxide (Fe 3 O 4 ) particles incorporated in a polymer matrix [17]. This is the approach taken in the current study to develop a new sorbent for uranium recovery [1][2][3][4][5]. The art of building innovative multiphase nanomaterials for efficient uranium sorption involves the fabrication of an organic-inorganic functional hybrid nanocomposite (high capacity and selectivity).…”

Section: Introductionmentioning

confidence: 99%

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Mesoporous Magnetic Cysteine Functionalized Chitosan Nanocomposite for Selective Uranyl Ions Sorption: Experimental, Structural Characterization, and Mechanistic Studies

et al. 2022

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Nuclear power facilities are being expanded to satisfy expanding worldwide energy demand. Thus, uranium recovery from secondary resources has become a hot topic in terms of environmental protection and nuclear fuel conservation. Herein, a mesoporous biosorbent of a hybrid magnetic–chitosan nanocomposite functionalized with cysteine (Cys) was synthesized via subsequent heterogeneous nucleation for selectively enhanced uranyl ion (UO22+) sorption. Various analytical tools were used to confirm the mesoporous nanocomposite structural characteristics and confirm the synthetic route. The characteristics of the synthesized nanocomposite were as follows: superparamagnetic with saturation magnetization (MS: 25.81 emu/g), a specific surface area (SBET: 42.56 m2/g) with a unipore mesoporous structure, an amine content of ~2.43 mmol N/g, and a density of ~17.19/nm2. The experimental results showed that the sorption was highly efficient: for the isotherm fitted by the Langmuir equation, the maximum capacity was about 0.575 mmol U/g at pH range 3.5–5.0, and Temperature (25 ± 1 °C); further, there was excellent selectivity for UO22+, likely due to the chemical valent difference. The sorption process was fast (~50 min), simulated with the pseudo-second-order equation, and the sorption half-time (t1/2) was 3.86 min. The sophisticated spectroscopic studies (FTIR and XPS) revealed that the sorption mechanism was linked to complexation and ion exchange by interaction with S/N/O multiple functional groups. The sorption was exothermic, spontaneous, and governed by entropy change. Desorption and regeneration were carried out using an acidified urea solution (0.25 M) that was recycled for a minimum of six cycles, resulting in a sorption and desorption efficiency of over 91%. The as-synthesized nanocomposite’s high stability, durability, and chemical resistivity were confirmed over multiple cycles using FTIR and leachability. Finally, the sorbent was efficiently tested for selective uranium sorption from multicomponent acidic simulated nuclear solution. Owing to such excellent performance, the Cys nanocomposite is greatly promising in the uranium recovery field.

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Regenerable Fe3O4-decorated chitosan/carboxymethyl cellulose hollow spheres for adsorption and catalytic degradation of dyes

Kong

Wang

et al. 2022

Cellulose

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Functionalized aminophosphonate chitosan-magnetic nanocomposites for Cd(II) removal from aqueous solutions: Performance and mechanisms of sorption

Cited by 33 publications

References 51 publications

Chemical Modification of Chitosan for Removal of Pb(II) Ions from Aqueous Solutions

Chemical Modification of Chitosan for Removal of Pb(II) Ions from Aqueous Solutions

Mesoporous Magnetic Cysteine Functionalized Chitosan Nanocomposite for Selective Uranyl Ions Sorption: Experimental, Structural Characterization, and Mechanistic Studies

Regenerable Fe3O4-decorated chitosan/carboxymethyl cellulose hollow spheres for adsorption and catalytic degradation of dyes

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