Cellulose-embedded polyacrylonitrile/amidoxime for the removal of cadmium (II) from wastewater: Adsorption performance and proposed mechanism

Abdelmonem, Haeam A.; Hassanein, Taha F.; Sharafeldin, Hani E.; Gomaa, Hassanien; Ahmed, Abdelaal S.A.; Abdel-lateef, Ashraf M.; Allam, Eman M.; Cheira, Mohamed F.; Eissa, Mohamed E.; Tilp, Amal H.

doi:10.1016/j.colsurfa.2023.133081

Cited by 26 publications

(3 citation statements)

References 77 publications

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“…The adsorption kinetics of PN-300 nanotubes onto uranium were also determined in aqueous solutions with different concentrations of uranium . With the increase of the original uranium concentration, the U(VI) uptake capacity of PN-300 grew fast (Figure c).…”

Section: Resultsmentioning

confidence: 99%

Phosphorus Nitride Imide Nanotubes for Uranium Capture from Seawater

Zhao,

Wang,

Wang

et al. 2024

ACS Nano

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Nuclear power plays a pivotal role in the global energy supply. The adsorption-based extraction of uranium from seawater is crucial for the rapid advancement of nuclear power. The phosphorus nitride imide (PN) nanotubes were synthesized in this study using a solvothermal method, resulting in chemically stable cross-linked tubular hollow structures that draw inspiration from the intricate snowflake fractal pattern. Detailed characterization showed that these nanotubes possess a uniformly distributed five-coordinated nanopocket, which exhibited great selectivity and efficiency in binding uranium. PN nanotubes captured 97.34% uranium from the low U-spiked natural seawater (∼355 μg L −1 ) and showed a high adsorption capacity (435.58 mg g −1 ), along with a distribution coefficient, K d U > 8.71 × 10 7 mL g −1 . In addition, PN nanotubes showed a high adsorption capacity of 7.01 mg g −1 in natural seawater. The facile and scalable production of PN nanotubes presented in this study holds implications for advancing their large-scale implementation in the selective extraction of uranium from seawater.

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Section: Resultsmentioning

confidence: 99%

Phosphorus Nitride Imide Nanotubes for Uranium Capture from Seawater

Zhao,

Wang,

Wang

et al. 2024

ACS Nano

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“…After contact time, the concentration of the Pb(II) species was measured by atomic absorption, and then the removal efficacy and the adsorption capacity were reckoned from Eqs. 1 and 2 (Abdelmonem et al 2024 ; Naggar et al 2023 ). where R% clarifies the percent of the removed pollutant from the treatment system.…”

Section: Fabrication and Application Experimentsmentioning

confidence: 99%

Sequestration of Pb(II) using channel-like porous spheres of carboxylated graphene oxide-incorporated cellulose acetate@iminodiacetic acid: optimization and mechanism study

El-Monaem,

Gomaa,

Omer

et al. 2024

Environ Sci Pollut Res

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The adsorption property of the costless green cellulose acetate (CA) was boosted by the dual modifications: inner modification by incorporating carboxylated graphene oxide (COOH-GO) into the CA spheres and outer modification by the surface modification of the COOH-GO@CA spheres by iminodiacetic acid (IDA) for removing Pb(II). The adsorption experiments of the Pb(II) proceeded in a batch mode to evaluate the adsorption property of the COOH-GO@CA@IDA spheres. The maximal Pb(II) adsorption capacity attained 613.30 mg/g within 90 min at pH = 5. The removal of Pb(II) reached its equilibrium within 20 min, and the removal % was almost 100% after 30 min at the low Pb(II) concentration. The Pb(II) adsorption mechanism was proposed according to the kinetics and isotherms studies; in addition, the zeta potential (ZP) measurements and X-ray Photoelectron Spectroscopy (XPS) analysis defined the adsorption pathways. By comparing the XPS spectra of the authentic and used COOH-GO@CA@IDA, it was deduced that the contributed chemical adsorption pathways are Lewis acid–base, precipitation, and complexation. The zeta potential (ZP) measurements demonstrated the electrostatic interaction participation in adsorbing the cationic Pb(II) species onto the negatively charged spheres (ZP = 14.2 mV at pH = 5). The unique channel-like pores of the COOH-GO@CA@IDA spheres suggested the pore-filling mechanism of Pb(II). The promising adsorption results and the superb recyclability character of COOH-GO@CA@IDA enable it to extend of the bench scale to the industrial scale.

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“…There are many types of adsorbents used for the adsorption treatment of heavy metals in wastewater, e.g., activated carbon [32], zeolite [33], resin [34], biomass [35,36], clay mineral [37], and inorganic-organic composites [38]. Bentonite is a natural adsorbent with a high adsorption capacity and a low price.…”

Section: Introductionmentioning

confidence: 99%

Influence of Sulfate and Nitrate for Lanthanum (III) Adsorption on Bentonite: Implications for Rare Earth Wastewater Disposal

Zhou,

Wan,

et al. 2024

Minerals

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The direct discharge of rare earth wastewater causes the waste of resources and heavy metal pollution. This paper compared the adsorption behaviors of lanthanide ions on bentonite under sulfate and nitrate systems by examining the factors affecting the adsorption, such as adsorption time, pH, background electrolyte concentration, and initial rare earth ion concentration. It was shown that the sulfate system was more favorable for the adsorption of rare earth ions on the bentonite surface. The maximum adsorption capacity in the sulfate system was about 1.7 times that in the nitrate system. In contrast, the adsorption under the nitrate system was more sensitive to the changes in pH and background electrolyte concentration. The adsorption processes under both systems are spontaneous physical adsorption processes (ΔGθ are from −27.64 to −31.48 kJ/mol), and both are endothermic (ΔHθ are 10.38 kJ/mol for the nitrate and 7.53 kJ/mol for the sulfate) and entropy-increasing (ΔSθ are 61.54 J/mol for the nitrate and 76.24 J∙mol−1 for the sulfate) processes. This study helps to provide information about the optimizing process parameters for the adsorption treatment of rare earth wastewater using bentonite.

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Cellulose-embedded polyacrylonitrile/amidoxime for the removal of cadmium (II) from wastewater: Adsorption performance and proposed mechanism

Cited by 26 publications

References 77 publications

Phosphorus Nitride Imide Nanotubes for Uranium Capture from Seawater

Phosphorus Nitride Imide Nanotubes for Uranium Capture from Seawater

Sequestration of Pb(II) using channel-like porous spheres of carboxylated graphene oxide-incorporated cellulose acetate@iminodiacetic acid: optimization and mechanism study

Influence of Sulfate and Nitrate for Lanthanum (III) Adsorption on Bentonite: Implications for Rare Earth Wastewater Disposal

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