Fe3O4–wheat straw: preparation, characterization and its application for methylene blue adsorption

Pirbazari, Azadeh Ebrahimian; Saberikhah, Elham; Kozani, S.S. Habibzadeh

doi:10.1016/j.wri.2014.09.001

Cited by 95 publications

(17 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such agglomeration in the structure of the PAN/ZnO nanofibers may decrease the potential active adsorptive sites on the surface. 24,[53][54][55] An analogy can be made between this effect and that observed in prior works [56][57][58] during the increase of adsorbent dose which may cause aggregation of adsorption sites and a decrease in total absorbent surface area. The possible mechanism of adsorption is discussed next.…”

Section: Adsorption Studymentioning

confidence: 80%

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Haddad

Alharbi

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

This article describes the adsorption and tensile behavior of electrospun polyacrylonitrile (PAN) nanofiber mats loaded with different amounts of ZnO [0.5, 1.0, 2.0, and 5.0 wt%] nanoparticles. X‐ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transforminfrared (FTIR) spectroscopy, and thermal gravimetric analysis (TGA) were utilized to characterize the resulting composite nanofibers. Microscopic investigations revealed that the increase in surface roughness and diameter of the electrospun PAN nanofibers was due to the addition of ZnO nanoparticles. Adsorption results indicated that the fabricated PAN/ZnO (2.0 wt%) composite nanofiber mats showed the best adsorption performance with 261% and 167% increase in adsorption capacities for Pb(II) and Cd(II) from aqueous solutions, respectively, compared to pristine PAN nanofibers. The adsorption equilibrium was reached within 60 min, and the process could be described using the nonlinear pseudo‐second‐order kinetic model. The adsorption isotherm study was better represented by the Langmuir model, which suggested a homogeneous distribution of the monolayer adsorptive sites on the surface of the composite nanofibers. Mechanical testing revealed that the decrease in tensile strength and elongation at breakof the PAN/ZnO composite nanofiber mats was due to the formation of some bead defects and agglomerates within the structure of the PAN nanofibers. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47209.

show abstract

Section: Adsorption Studymentioning

confidence: 80%

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Haddad

Alharbi

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Acrylamido-2-methyl-1-propanesulfonic acid-based hydrogel 261.78 [8] Lignocellulose-g-poly(acrylic acid)/montmorillonite 1994.38 [35] Decanted Moroccan clay 114.16 [36] N-tert-butylmaleamic acid-based hydrogel 384.6 [37] Activated carbon 882.4 [38] Straw with Fe3O4 magnetic nanoparticles 1374.6 [39] Activated biochar 77.3 [40] Xanthan gum-co-acrylic acid/graphene oxide 793.65 [41] (AAm-co-AHPS)/ Organo-MMT 811.5…”

Section: Adsorbent Qmax (Mg/g) Referencementioning

confidence: 99%

Synthesis and characterization of (AAm-co-AHPS)/MMT hydrogel composites for the efficient capture of methylene blue from aqueous solution

Elkony

Ibrahim

El-Farah

et al. 2020

Al-Azhar Bulletin of Science

View full text Add to dashboard Cite

In this study, Acrylamide-co-3-Allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt/ montmorillonite [(AAm-co-AHPS)/MMT)] hydrogel composite was synthesis via in situ free-radical copolymerization. The swelling properties and adsorption efficiency of MB were studied. Effect of AHPS ratio on the properties of hydrogel composite was investigated at different AAm/AHPS molar ratio of 100/0, 95/5, 90/10, 85/15, and 80/20. The highest swelling ratio (49.71 g/g) was observed for the composite containing 15% AHPS. The hydrogel composites were characterized using FTIR, TGA, XRD, and SEM. Effects of AHPS ionic monomer, contact time, dye concentration, pH, adsorbent dose, and temperature on the adsorption capacity of MB were studied. Additionally, the reusability of the composite up to five consecutive cycles was also investigated. The adsorption process was observed to obey the pseudo-second-order kinetics model, and the adsorption isotherm was best matched with the Langmuir isotherm model. Hydrogel composite (15% AHPS) achieved qmax of 811.5 mg/g as calculated by Langmuir equation. The calculated thermodynamic parameters ΔH, ΔG, and ΔS revealed the endothermic nature, spontaneity of the adsorption, and the positive affinity of the composites for MB adsorption with a favorable increment in the randomness at the interface between the composite and MB solution during the adsorption process.

show abstract

“…MNP are characterized by high surface area, biocompatibility, great number of active sites, and fast adsorbent separation from solution through magnetic field [18]. After the application of magnetic field to separate the adsorbent, varied desorbing agents can be used to remove the attached pollutants from magnetic nanoparticles and therefore MNP can be reused [19]. The synthetic MNP-coated natural and waste materials were applied significantly in the decontamination of organic pollutants [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…After the application of magnetic field to separate the adsorbent, varied desorbing agents can be used to remove the attached pollutants from magnetic nanoparticles and therefore MNP can be reused [19]. The synthetic MNP-coated natural and waste materials were applied significantly in the decontamination of organic pollutants [19,20]. Serpentine (SP, Mg 3 Si 2 O 5 (OH) 4 ) is formed by the alteration of Mg-rich silicate minerals such as pyroxene and olivine, producing the three common silicate minerals chrysotile, antigorite, and lizardite.…”

Section: Introductionmentioning

confidence: 99%

A Novel Nanocomposite of Activated Serpentine Mineral Decorated with Magnetic Nanoparticles for Rapid and Effective Adsorption of Hazardous Cationic Dyes: Kinetics and Equilibrium Studies

et al. 2020

View full text Add to dashboard Cite

A widely distributed mineral, serpentine, obtained from Wadi Ghadir (Eastern Desert in Egypt) was studied as a potential naturally and abundantly available source for the synthesis of an efficient adsorbent for aquatic remediation applications. A novel nanocomposite was synthesized after the exfoliation of the layered structure of serpentine by hydrogen peroxide treatment (serpentine (SP)), followed by decoration with magnetic Fe3O4 nanoparticles (MNP). The goal behind the utilization of the latter phase was to increase the environmental remediation capability and to incorporate magnetic properties at the final adsorbent, toward a better separation after the use. The fabricated composite (MNP/SP) was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The composite’s potential adsorption application toward the removal of two cationic dyes, methylene blue (MB) and malachite green (MG), was investigated. The observed adsorption kinetics was fast, and the highest uptake was observed at pH = 8, with the capacities to reach 162 and 176 mg g−1 for MB and MG, respectively, values significantly higher than various other materials tested against these two cationic dyes. Compared to hydrogen peroxide-treated serpentine, the removal efficiency of the composite was higher by 157 and 127% for MB and MG, respectively. The MB and MG were adsorbed because of the favorable electrostatic interactions between MNP/SP active sites and the cationic dyes. The close value capacities suggest that the difference in chemistry of the two dyes does not affect the interactions, with the later occurring via the dyes’ amine functionalities. With increasing ionic strength, the adsorption of the studied basic dyes was slightly decreased, suggesting only partial antagonistic ion effect. The sorbent can be easily regenerated and reused without significant deterioration of its adsorption efficiency, which makes MNP/SP a promising adsorbent for the removal of hazardous pollutants from aquatic environments.

show abstract

Fe3O4–wheat straw: preparation, characterization and its application for methylene blue adsorption

Cited by 95 publications

References 37 publications

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Enhancement of heavy metal ion adsorption using electrospun polyacrylonitrile nanofibers loaded with ZnO nanoparticles

Synthesis and characterization of (AAm-co-AHPS)/MMT hydrogel composites for the efficient capture of methylene blue from aqueous solution

A Novel Nanocomposite of Activated Serpentine Mineral Decorated with Magnetic Nanoparticles for Rapid and Effective Adsorption of Hazardous Cationic Dyes: Kinetics and Equilibrium Studies

Contact Info

Product

Resources

About