Designer composite of montmorillonite-reduced graphene oxide-PEG polymer for water treatment: Enrofloxacin sequestration and cost analysis

Akpotu, Samson O.; Diagboya, Paul N.; Lawal, Isiaka A.; Sanni, Saheed O.; Pholosi, Agnes; Peleyeju, Moses G.; Mtunzi, Fanyana M.; Ofomaja, Augustine E.

doi:10.1016/j.cej.2022.139771

Cited by 51 publications

(19 citation statements)

References 58 publications

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“…The FTIR spectra of HSAMs are presented in Figure (b). The band peak at 3430 cm –1 represents the Si–OH group’s typical O–H stretching vibration and the adsorbed moisture of pure aerogels (PA-V and PA-S) without hydrophobic modification. − Furthermore, the 2977 cm –1 band could be the result of the C–H stretching vibration of the −CH 3 group from hydrophobic aerogel HMDS (HA-S and HA-V) . The bands at 1269 and 1257 cm –1 are C–H symmetrically deformed vibrations from the Si–OR group.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the Si–CH 3 groups in HMDS were fully grafted onto the SMGs during hydrophobic modification. In addition, Si–CH 3 grafting makes hydrophobic aerogels (HA-S and HA-V) with good hydrophobic properties (Figure (c)). , …”

Section: Resultsmentioning

confidence: 99%

“…In addition, Si−CH 3 grafting makes hydrophobic aerogels (HA-S and HA-V) with good hydrophobic properties (Figure 2(c)). 53,54 The N 2 adsorption/desorption isotherms and pore size distribution curves are shown in Figure 4. The corresponding pore structure data are summarized in Table 1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

et al. 2022

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The objective of this research was to develop new hydrophobic silica aerogel microspheres (HSAMs) with water glass and hexmethyldisilazane for oil adsorption. The effects of the hexmethyldisilazane concentration and drying method on the structure and organic liquid adsorption capacity were investigated. The hexmethyldisilazane concentration of the modification solution did not influence the microstructure and pore structure in a noteworthy manner, which depended more on the drying method. Vacuum drying led to more volume shrinkage of the silica gel microsphere (SGM) than supercritical CO 2 drying, thus resulting in a larger apparent density, lower pore volume, narrower pore size distribution, and more compact network. Owing to the large pore volume and pore size, the HSAMs synthesized via supercritical CO 2 drying had a larger organic liquid adsorption capacity. The adsorption capacities of the HSAMs with pore volumes of 4.04−6.44 cm 3 /g for colza oil, vacuum pump oil, and hexane are up to 18.3, 18.9, and 11.8 g/g, respectively, higher than for their state-of-the-art counterparts. The new sorbent preparation method is facile, cost-effective, safe, and ecofriendly, and the resulting HSAMs are exceptional in capacity, stability, and regenerability.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

et al. 2022

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“…As can be seen, the amount of the adsorbed Co (II) increases signifcantly reaching a maximum capacity of 130.36 mg/g at pH 5. Increasing pH reduces the amount of H + , thus reducing competition for adsorption sites onto particle surfaces between metal ions and protons [52]. Te other aspect that may aid in metal ions' sorption is the rise in the pH, which promotes their precipitation from solution as hydroxides.…”

Section: Infuence Of Ph On Co (Ii) Removal By the Nanosorbentmentioning

confidence: 99%

Green Synthesis Ca-MgO Nanosorbent for the Uptake of Cobalt Ions from Aqueous Media

Al-Awaji

Boukriba

Idriss

et al. 2022

Advances in Materials Science and Engineering

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Ca-doped magnesium oxide nanosorbent has been prepared by sol-gel in the presence of gum arabic extract and assessed for the removal of cobalt ions (Co (II)) from aqueous media. X-ray diffraction analysis indicates the formation of MgO and CaO composites with a mean crystallite size of 6 nm having a large surface area of 50 m2/g. Scanning and transmission electron microscopy observations reveal spherical-shaped particles at the nanoscale around 20 nm. Besides, X-ray photoelectron spectroscopy and Fourier transform infrared analyses manifest the existence of functional groups, which will facilitate the adsorption of metal ions. The adsorption capability of the CaO-MgO nanosorbent achieved 469.5 mg/g for Co (II) ions under optimum operating conditions. Furthermore, the experimental data elucidate that the adsorption process is primarily diffusion-based and that both intraparticle and boundary layer diffusion appear to play a key role in the rate-controlling step. The findings of this study highlight the remediation of contaminated water by cobalt ions by CaO-MgO nanostructure and can be extended to other metal ions and organic pollutants.

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“…[28] The study of graphene nanocomposite is an evolving field, [29] with numerous potential for its application. [30][31][32] In this study, a small loading of CNC on GO was performed to enhance the pore size, porosity and prevent aggregation on the hybrid of GO and CNC, which was further reduced to form a hybrid sponge. The hybrid graphene-nanocrystalline cellulose (G-CNC) composite was used in the adsorption of Asp and Acet.…”

Section: Introductionmentioning

confidence: 99%

Crystalline Nanocellulose Anchored on Reduced Graphene Oxide for the Removal of Pharmaceuticals from Aqueous Systems: Adsorbent Characterization and Adsorption Performance

2023

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Improved adsorption of pharmaceuticals on reduced graphene oxide anchored on a crystalline nanocellulose base was achieved in this study. One-pot synthesis of graphene-nanocrystalline cellulose (G-CNC) hybrid with in-depth characterization was carried out, and the adsorbent's successful synthesis was confirmed through the characteristic peaks observed using FTIR and XRD. Further characterization was done using the surface area and porosity analyzer, TGA, SEM, TEM, and the elemental analyzer. The adsorbent was then applied in the adsorption of aspirin (Asp) and acetaminophen (Acet), which are frequently used over-the-counter anti-inflammatory and antipyretic drugs. The major mechanism for the adsorption was ascertained to be through electrostatic interaction, hydrogen bonding, hydrophobic and π-π interactions with the pharmaceutical. The maximum capacity for sorption obtained for the adsorption of Asp on graphene oxide (GO) and G-CNC was 61.73 mg/g and 99 mg/g, respectively, while those of Acet on GO and G-CNC were 20.41 mg/g and 76.34 mg/g, respectively.

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Designer composite of montmorillonite-reduced graphene oxide-PEG polymer for water treatment: Enrofloxacin sequestration and cost analysis

Cited by 51 publications

References 58 publications

Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

Green Synthesis Ca-MgO Nanosorbent for the Uptake of Cobalt Ions from Aqueous Media

Crystalline Nanocellulose Anchored on Reduced Graphene Oxide for the Removal of Pharmaceuticals from Aqueous Systems: Adsorbent Characterization and Adsorption Performance

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