Adsorption behavior of cationic and anionic dyes on magadiite-chitosan composite beads

Mokhtar, Adel; Abdelkrim, Soumia; Djelad, Amal; Sardi, Amina; Boukoussa, Bouhadjar; Sassi, Mohamed; Bengueddach, Abdelkader

doi:10.1016/j.carbpol.2019.115399

Cited by 186 publications

(47 citation statements)

References 39 publications

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“…Indeed, its MB adsorption capacity was about 28.5, 3.5 and 2.9 times higher than activated carbons generated from Macore fruit shells [55], cola nut shells [56] and cellulose biocomposite films [57]. Besides, MO adsorption capacity by OSAC 400°C was about 2.5, 2.3 and 1.7 higher than those reported for activated carbons generated from Vitis vinifera [58], a copper sulfide nanoparticle-loaded activated carbon [59], and an activated carbon synthetized from boiler residue [60].…”

Section: Impact Of Initial Concentration-isotherm Modelingmentioning

confidence: 80%

Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon

Mahmoudi¹,

Hamdi²,

Ali³

et al. 2021

Comptes Rendus. Chimie

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Section: Impact Of Initial Concentration-isotherm Modelingmentioning

confidence: 80%

Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon

Mahmoudi¹,

Hamdi²,

Ali³

et al. 2021

Comptes Rendus. Chimie

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“…In order to further verify the mechanism behind the adsorption of AFs over BB, pseudo first order (PFO) and pseudo second order (PSO) kinetics models were applied to the kinetic data using Equations (1) and (2) respectively [ 38 , 41 , 44 , 45 , 46 ]. ln (q e − q t ) = lnq e − k 1 t t/q t = 1/(k 2 q e 2 ) + t/q e where qe and qt are the adsorption capacities (mg/g) at equilibrium and at any time t respectively, k1 (min −1 ) and k2 (g.mg −1 min −1 ) are the PFO and PSO rate constants, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Correlation coefficient thus obtained suggested the best suitability of PSO in defining the adsorption mechanism and had R 2 values above 0.99 for all four types of AFs, while the qe values obtained from PSO were also closer to the experimental qe values than those obtained from the PFO kinetic model. These findings suggested that the chemisorption could be the more prevalent mechanism and rate determining step in the adsorption process [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

Assessing the Aflatoxins Mitigation Efficacy of Blueberry Pomace Biosorbent in Buffer, Gastrointestinal Fluids and Model Wine

Rasheed

Ain

Muhammad

et al. 2020

Toxins

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Blueberry (BB) and cherry pomace were investigated as new biosorbents for aflatoxins (AFs) sequestration from buffered solutions, gastrointestinal fluids and model wine. Among the tested biosorbents, BB exhibited the maximum adsorption performance for AFs and hence was further selected for the optimization of experimental parameters like pH, dosage, time and initial concentration of AFs. Material characterizations via scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, N2 adsorption-desorption isothermal studies, thermogravimetric analysis (TGA) and X-ray photon spectroscopy (XPS) techniques revealed useful information about the texture and chemical composition of the biosorbents. The fitting of isothermal data with different models showed the model suitability trend as: Sips model > Langmuir model > Freundlich model, where the theoretical maximum adsorption capacity calculated from the Sips model was 4.6, 2.9, 2.7 and 2.4 mg/g for AFB1, AFB2, AFG1 and AFG2, respectively. Kinetics study revealed the fast AFs uptake by BB (50–90 min) while thermodynamics studies suggested the exothermic nature of the AFs adsorption from both, single as well as multi-toxin buffer systems, gastrointestinal fluids and model wine. Accrediting to the fast and efficient adsorption performance, green and facile fabrication approach and cost-effectiveness, the newly designed BB pomace can be counted as a promising contender for the sequestration of AFs and other organic pollutants.

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“…In ZnO/chitosan nanocomposite, the ZnO may play a role as a rigid support for the thin lm of chitosan, which contains -OH/-NH 2 groups. ese functional groups probably play a role as binding sites to congo red molecules as proposed in numbers of publications [21,47]. Further study, however, should be carried out in order to address the exact mechanism of the adsorption process.…”

Section: 2mentioning

confidence: 97%

In Situ Synthesis and Characterization of ZnO/Chitosan Nanocomposite as an Adsorbent for Removal of Congo Red from Aqueous Solution

Nguyen

Nguyen³

2020

Advances in Polymer Technology

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ZnO/chitosan nanocomposite was successfully synthesized by in-situ precipitation method. The material was characterized by XRD, FESEM, TEM, FTIR, BET, and TGA. Results show that ZnO/chitosan nanocomposite has spherical shape with the average size of 20–25 nm. BET surface area and the average pore size of ZnO/chitosan nanocomposite are 2.2436 (m2/g) and 12.2 nm, respectively. The material was applied as an adsorbent for congo red removal from aqueous solutions. The congo red adsorption is better described by the Langmuir model (R2=0.996) than by the Freundlich model (R2=0.962). Therefore, it can be presumed that congo red was adsorbed in a single monolayer with the theoretical maximum adsorption capacity of 227.3 (mg/g). This is comparable to other available adsorbents. It can be suggested that ZnO/chitosan nanocomposite could serve as promising adsorbent for congo red in wastewater treatment technology.

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Adsorption behavior of cationic and anionic dyes on magadiite-chitosan composite beads

Cited by 186 publications

References 39 publications

Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon

Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon

Assessing the Aflatoxins Mitigation Efficacy of Blueberry Pomace Biosorbent in Buffer, Gastrointestinal Fluids and Model Wine

In Situ Synthesis and Characterization of ZnO/Chitosan Nanocomposite as an Adsorbent for Removal of Congo Red from Aqueous Solution

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