Multi-walled carbon nanotubes as an adsorbent material for the solid phase extraction of bismuth from aqueous media: Kinetic and thermodynamic studies and analytical applications

Al-Saidi, Hamed M.; Abdel-Fadeel, M.A.; El‐Sonbati, A.Z.; El-Bindary, A.A.

doi:10.1016/j.molliq.2016.01.086

Cited by 35 publications

(7 citation statements)

References 38 publications

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“…The variation of the acid red dye adsorption from liquid solutions onto PES-NH2 with AC-COOH was also tested with a Lagergren equation [19]:…”

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

“…The pseudo-second-order model has been investigated as a Langmuir kinetics type [19], taking into consideration two factors: the first is that the analyte concentration with respect to time is a constant and the second factor is that the binding sites rely on the analyte adsorbed quantity at equilibrium. The pseudo-second-order linear equation was stated as follows:…”

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

“…It is clearly seen from these reported data that all the experimental measured values were considered suitable values. The pseudo-second-order rate constant (k 2 ) values rely on different experimental factors including the initial PES-NH 2 -AC-COOH concentration, the pH values, as well as the temperature [19].…”

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

“…The adsorption capacity rate is usually determent using the Elovich equation [19]. This equation is appropriate mostly for systems that show kinetics of chemisorptions and it can be also applied to a system in which the adsorbent surface area is heterogeneous.…”

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

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Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis

Alenazi

Hussein

Alamry

et al. 2018

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Aminated polyethersulfone (PES-NH 2 ) has been synthesized and used with carboxylated activated carbon (AC-COOH) as an adsorbent using two different methods: in situ and ex situ techniques. The chemical modification of polyethersulfone (PES) to introduce -NH 2 functions was used to overcome the hydrophobicity of PES which maximizes its use in water treatment applications whereas applying AC-COOH to this polymer provides a promising effective method as an adsorbent-separation technique to remove dye pollutants from wastewater. The structure and characterization of aminated polyethersulfone with carboxylated activated carbon (PES-NH 2 -AC-COOH) were identified using proton nuclear magnetic resonance ( 1 H-NMR), Fourier transform infrared (FT-IR spectroscopy), X-ray diffraction (XRD), thermal analysis (TA), and a scanning electron microscopy (SEM). The performance of PES-NH 2 in situ and ex situ with AC-COOH was tested for the adsorption of cationic (methylene blue) and anionic (acid red 1) dyes from an aquatic environment. The results of the study showed a better thermal stability for the PES-NH 2 with 20% AC-COOH with both in situ and ex situ techniques as well as an excellent adsorption performance in comparison with the bare PES-NH 2 . The resultant polymers displayed significantly high adsorption rates for the acid red dye (60% and 68%) and methylene blue dye (61% and 88%) by PES-NH 2 with AC-COOH using in situ and ex situ techniques, respectively, in comparison with the control (PES-NH 2 ) which showed lower adsorption rates for both dyes (21% for acid red and 33% for methylene blue). Lastly, the study experimental measurements found the most suitable model to describe the kinetic behavior of the acid red dye adsorption by our developed polymer (by PES-NH 2 with AC-COOH) to be the pseudo-second-order kinetic model.

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“…The variation of the acid red dye adsorption from liquid solutions onto PES-NH2 with AC-COOH was also tested with a Lagergren equation [19]:…”

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

Section: The Adsorption Kinetic Performance For the Acid Red Dye By Pmentioning

confidence: 99%

See 2 more Smart Citations

Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis

Alenazi

Hussein

Alamry

et al. 2018

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“…Due to their relatively large specific surface area, small size, hollow and layered structure, CNTs have attracted increasing attention as a new type of powerful solid-phase extraction adsorbent [16][17] . CNTs have been applied as an effective adsorbent for the removal of organic and inorganic contaminants including methylene blue 18 , rhodamine B 19 , Direct Blue 53 20 , Reactive Blue 19,21 , Bismarck Brown R 22 , Congo red 5 , malachite green 23 , bismuth, lead, zinc, and phenol [24][25] from water. However, some disadvantages such as the poor solubility of CNTs and difficulty of collecting them from their dispersing media by tedious centrifugation processes have caused much inconvenience in their practical application 16 .…”

mentioning

confidence: 99%

Preparation of A MWCNT-Graphite Composite Based on Sol Gel Method for Dye Removal

Shirgholami¹,

Mirjalili²,

Nasirizadeh³

2017

Orient. J. Chem

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Carbon based composites have good capability for elimination of colored pollutants. In this work, a multi-walled carbon nanotube-graphite Composite (MW-g-C) was prepared using a sol gel method. The N 2 adsorption/desorption curves, scanning electron microscopy and zeta potential were used for characterization of MW-g-C. The adsorption characteristics of MW-g-C were studied using Basic Blue 41 (BB41) dye as an adsorbate. The effects of several influential parameters such as contact time, pH, adsorbent dose and initial concentration on the adsorption were well investigated and optimized. The maximum amount of dye adsorbed in optimal conditions (include pH= 6.8, amount of MW-g-C= 1.37 g L -1) was 115 mg g -1 . The linear correlation coefficients and the standard deviations of Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin isotherms were determined. The results also showed that the adsorption kinetics was controlled by a pseudo second-order model for adsorption of dye onto MW-g-C. The ∆G°, ∆H° and E a values indicated that the adsorption of BB41 onto MW-g-C was physisorption.

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Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe₂O₄/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions

Katowah,

Sadek

2024

J of Applied Polymer Sci

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In this study, a new hybrid material was created that exhibits excellent adsorption performance and high stability. POT‐PVP/MgF/CS‐OXSWCNTs NCs were synthesized using a three‐step approach. The process involved the chemical polymerization of poly(o‐toluidine)‐polyvinylpyrrolidone (POT‐PVP) with MgFe2O4 nanoparticles (MgF NPs) and chitosan‐oxidized single‐wall carbon nanotubes (CS‐OXSWCNTs). The synthesis process involved the use of an egg white method to synthesize MgF NPs and cross‐linking chitosan with OXSWCNTs using glutaraldehyde (GA) to obtain CS‐OXSWCNTs. The POT‐PVP copolymer was then used to coat MgF NPs and CS‐OXSWCNTs NCs. The successful synthesis of the NCs with strong component interaction was confirmed by several characterization techniques, including X‐ray diffraction spectroscopy (XRD), Fourier‐transform infrared spectroscopy (FTIR), and Raman spectroscopy. Microscopy analysis using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) verified that the POT‐PVP copolymer had properly coated the MgF NPs and CS‐OXSWCNTs NCs. The N2 adsorption–desorption isotherm verified that the specific surface area of NCs had increased with the addition of MgF NPs and CS‐OXSWCNTs NCs. Furthermore, the composite structure greatly improved the thermal stability of POT‐PVP/MgF/CS‐OXSWCNTs NCs. To evaluate how well the nanocomposites (NCs) eliminated pollutants, an artificially produced toxic effluent that contained acid red dye (A.R) was applied. To investigate their impact on dye removal, several parameters were changed, including pH, adsorbent dosage, time, temperature, and ionic strength. The POT‐PVP/MgF/CS‐OXSWCNTs NCs showed a higher removal rate based on a greater surface area, stability, and conducting power than MgF NPs and POT‐PVP. It was found that 25 mg L−1 and 7.5 mg were the optimal dye concentration and adsorbent dosage, respectively. The POT‐PVP/MgF/CS‐OXSWCNTs NCs achieved 99.46% removal efficiency at an acidic pH of 2. The NCs were found to have a maximum dye adsorption capacity of 107.4 mg g−1, and the adsorption process followed the pseudo‐second‐order kinetics. Thermodynamic analyses revealed that the dye adsorption onto POT‐PVP/MgF/CS‐OXSWCNTs NCs was endothermic, implying a spontaneous and physical adsorption mechanism. It can be inferred from these results that POT‐PVP/MgF/CS‐OXSWCNTs NCs are useful for eliminating dye pollutants from water.

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Multi-walled carbon nanotubes as an adsorbent material for the solid phase extraction of bismuth from aqueous media: Kinetic and thermodynamic studies and analytical applications

Cited by 35 publications

References 38 publications

Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis

Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis

Preparation of A MWCNT-Graphite Composite Based on Sol Gel Method for Dye Removal

Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe₂O₄/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions

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Multi-walled carbon nanotubes as an adsorbent material for the solid phase extraction of bismuth from aqueous media: Kinetic and thermodynamic studies and analytical applications

Cited by 35 publications

References 38 publications

Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis

Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis

Preparation of A MWCNT-Graphite Composite Based on Sol Gel Method for Dye Removal

Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe2O4/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions

Contact Info

Product

Resources

About

Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe₂O₄/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions