Kinetics, equilibrium and isotherms of Pb2+ adsorption from aqueous solutions on carbon nanotubes functionalized with 3-amino-5a,10a-dihydroxybenzo[b] indeno [2,l-d]furan-10-one

Eyni, Hamzeh; Tahermansouri, Hasan; Kiani, Farhoush; Jahangiri, Mansour

doi:10.1016/s1872-5805(19)60027-2

Cited by 35 publications

(10 citation statements)

References 51 publications

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“…55 It is known that adsorption can be considered as physical if the calculated value of E is below 8 kJ mol –1 and chemical if the value is in the range of 8–16 kJ mol –1 . 56 Moreover, according to the calculated E value (see Table 4 ), the adsorption can be confirmed by characterization of chemisorption and through electrostatic interactions.…”

Section: Resultsmentioning

confidence: 73%

“…The Sips isotherm was used to investigate the monolayer adsorption of Lev; when n s = 1, the adsorption confirms the Langmuir model, whereas if n s > 1, it confirms the Freundlich model . Moreover, according to the obtained data-fitting values demonstrated in Table , it can be noted that n s = 1 confirms the Langmuir model.…”

Section: Resultsmentioning

confidence: 76%

“…The Dubinin-Radushkevich isotherm was studied to differentiate the physical and chemical adsorption of Lev with a Gaussian energy distribution ( E ) onto the MnFe 2 O 3 /GO core–shell nanocomposite surface . It is known that adsorption can be considered as physical if the calculated value of E is below 8 kJ mol –1 and chemical if the value is in the range of 8–16 kJ mol –1 . Moreover, according to the calculated E value (see Table ), the adsorption can be confirmed by characterization of chemisorption and through electrostatic interactions.…”

Section: Resultsmentioning

confidence: 99%

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One-Step Synthesis of a Mn-Doped Fe₂O₃/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

et al. 2022

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This study describes for the first time the synthesis, characterization, and application of a MnFe 2 O 3 /GO core–shell nanocomposite as an adsorbent for the removal of levofloxacin (Lev) from real water samples. The formation of the proposed nanocomposite was confirmed using various characterization techniques. The structural techniques revealed a 20 nm average particle size of the MnFe 2 O 3 /GO core–shell nanocomposite, with a surface area of 70.7 m 2 g –1 , as shown by the BET results. The most influential parameters (adsorbent dosage, stirring rate, and Lev pH) that affected the adsorption process were optimized using the response surface methodology (RSM) based on a central composite design. The optimum conditions were 0.007 g, 2, and 7 for adsorbent dosage, stirring rate, and Lev pH, respectively. The adsorption behavior of Lev on the MnFe 2 O 3 /GO core–shell nanocomposite was examined using isotherm models, kinetics, and thermodynamics. The kinetic models demonstrated that the adsorption process was controlled by both intraparticle and outer diffusion. Furthermore, the results obtained revealed that the adsorption of Lev on MnFe 2 O 3 /GO was dominated by electrostatic interactions. Moreover, Dubinin-Radushkevich and Temkin isotherms confirmed that the sorption mechanism was dominated by electrostatic interactions, while Langmuir and Sips models confirmed a monolayer adsorption process. The maximum adsorption capacity of Lev onto the MnFe 2 O 3 /GO adsorbent was found to be 129.9 mg g –1 . Furthermore, the thermodynamic data revealed that the adsorption system was spontaneous and exothermic. The synthesized MnFe 2 O 3 /GO core–shell nanocomposite showed significant recyclability and regenerability properties up to five adsorption–desorption cycles. As a proof of concept, the performance of the prepared adsorbent was evaluated for laboratory-scale purification of spiked real water samples. The prepared adsorbent significantly reduced the concentration of Lev in the real water samples and the removal efficiency ranged from 86 to 97%.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

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One-Step Synthesis of a Mn-Doped Fe₂O₃/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

et al. 2022

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“…The Sips model describes monolayer adsorption where an adsorbate molecule can adsorb to the 1/ a s site, more in line with the Langmuir model. 47…”

Section: Resultsmentioning

confidence: 99%

Synthesis process and adsorption performance of temperature-sensitive ion-imprinted porous microspheres (ReO₄⁻-TIIM) for the selective separation of ReO₄⁻

Niu

et al. 2023

New J. Chem.

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“…The correlation coefficient (R 2 ) and the sum of the square of the errors were obtained directly from the software. The chi-square (χ 2 ) (Equation (6)) test is the sum of squared errors of the differences between the experimental and calculated adsorption capacities and the calculated divided by the corresponding calculated adsorption capacity [ 60 , 61 , 62 , 63 ]:

where q exp (mg g −1 ) and q cal (mg g −1 ) are the experimental and calculated adsorption capacities, respectively.…”

Section: Methodsmentioning

confidence: 99%

Protein Adsorption Performance of a Novel Functionalized Cellulose-Based Polymer

et al. 2022

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Dicarboxymethyl cellulose (DCMC) was synthesized and tested for protein adsorption. The prepared polymer was characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES), attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and solid state nuclear magnetic resonance (ssNMR) to confirm the functionalization of cellulose. This work shows that protein adsorption onto DCMC is charge dependent. The polymer adsorbs positively charged proteins, cytochrome C and lysozyme, with adsorption capacities of 851 and 571 mg g−1, respectively. In both experiments, the adsorption process follows the Langmuir adsorption isotherm. The adsorption kinetics by DCMC is well described by the pseudo second-order model, and adsorption equilibrium was reached within 90 min. Moreover, DCMC was successfully reused for five consecutive adsorption–desorption cycles, without compromising the removal efficiency (98–99%).

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Kinetics, equilibrium and isotherms of Pb2+ adsorption from aqueous solutions on carbon nanotubes functionalized with 3-amino-5a,10a-dihydroxybenzo[b] indeno [2,l-d]furan-10-one

Cited by 35 publications

References 51 publications

One-Step Synthesis of a Mn-Doped Fe₂O₃/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

One-Step Synthesis of a Mn-Doped Fe₂O₃/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

Synthesis process and adsorption performance of temperature-sensitive ion-imprinted porous microspheres (ReO₄⁻-TIIM) for the selective separation of ReO₄⁻

Protein Adsorption Performance of a Novel Functionalized Cellulose-Based Polymer

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Kinetics, equilibrium and isotherms of Pb2+ adsorption from aqueous solutions on carbon nanotubes functionalized with 3-amino-5a,10a-dihydroxybenzo[b] indeno [2,l-d]furan-10-one

Cited by 35 publications

References 51 publications

One-Step Synthesis of a Mn-Doped Fe2O3/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

One-Step Synthesis of a Mn-Doped Fe2O3/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

Synthesis process and adsorption performance of temperature-sensitive ion-imprinted porous microspheres (ReO4−-TIIM) for the selective separation of ReO4−

Protein Adsorption Performance of a Novel Functionalized Cellulose-Based Polymer

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One-Step Synthesis of a Mn-Doped Fe₂O₃/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

One-Step Synthesis of a Mn-Doped Fe₂O₃/GO Core–Shell Nanocomposite and Its Application for the Adsorption of Levofloxacin in Aqueous Solution

Synthesis process and adsorption performance of temperature-sensitive ion-imprinted porous microspheres (ReO₄⁻-TIIM) for the selective separation of ReO₄⁻