Adsorption of single and mixed colors by kaolinite clay: Experimental research combined with a theoretical examination using DFT

Naboulsi, Aicha; Kassimi, Aziz El; Yazid, Hicham; Essebbar, Fatima-ezzahraa; Himri, Mamoune El; Haddad, Mohammadine El

doi:10.1016/j.molstruc.2022.134687

Cited by 19 publications

(2 citation statements)

References 39 publications

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“…This result suggested the favorability of MG adsorption onto KP and NA-KP, and the adsorption was more favorable for NA-KP [ 41 ]. As for the parameters obtained from Freundlich model, both 1/n of KP and NA-KP were smaller than one, which demonstrated the favorability of MG adsorption onto KP and NA-KP [ 42 ]. Furthermore, the 1/n of NA-KP (0.17) was smaller than that of KP (0.28), indicating that MG adsorption was more favorable by NA-KP than by KP.…”

Section: Resultsmentioning

confidence: 99%

Efficient and Selective Adsorption of Cationic Dye Malachite Green by Kiwi-Peel-Based Biosorbents

Zhao

Liu

et al. 2023

Molecules

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In this study, pristine kiwi peel (KP) and nitric acid modified kiwi peel (NA-KP) based adsorbents were prepared and evaluated for selective removal of cationic dye. The morphology and chemical structure of KP and NA-KP were fully characterized and compared, and results showed nitric acid modification introduced more functional groups. Moreover, the adsorption kinetics and isotherms of malachite green (MG) by KP and NA-KP were investigated and discussed. The results showed that the adsorption process of MG onto KP followed a pseudo-second-order kinetic model and the Langmuir isotherm model, while the adsorption process of MG onto NA-KP followed a pseudo-first-order kinetic model and the Freundlich isotherm model. Notably, the Langmuir maximum adsorption capacity of NA-KP was 580.61 mg g−1, which was superior to that of KP (297.15 mg g−1). Furthermore, thermodynamic studies demonstrated the feasible, spontaneous, and endothermic nature of the adsorption process of MG by NA-KP. Importantly, NA-KP showed superior selectivity to KP towards cationic dye MG against anionic dye methyl orange (MO). When the molar ratio of MG/MO was 1:1, the separation factor (αMG/MO) of NA-KP was 698.10, which was 5.93 times of KP. In addition, hydrogen bonding, π-π interactions, and electrostatic interaction played important roles during the MG adsorption process by NA-KP. This work provided a low-cost, eco-friendly, and efficient option for the selective removal of cationic dye from dyeing wastewater.

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Section: Resultsmentioning

confidence: 99%

Efficient and Selective Adsorption of Cationic Dye Malachite Green by Kiwi-Peel-Based Biosorbents

Zhao

Liu

et al. 2023

Molecules

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“…The existence of polluting dyes in wastewater adversely affects aquatic organisms − and can also pose health risks to humans, causing cancer and skin-related diseases. − Various physical, oxidative, and biological methods have been proposed for the removal of textile dye from aquatic systems. − Among these methods, adsorption is a standard and straightforward process for dye removal. Previous studies have demonstrated the successful use of this technique for the removal of several dyes, such as basic yellow and malachite green, methylene blue, − crystal violet, , navy blue, congo red, and remazol black B (RB-B) . RB-B, also known as reactive black 5, is a member of the azo dye family and is commonly used as a colorant in the textile industry.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Dye Adsorption of Chitosan and Polyethylenimine Modified Bentonite Clays: Optimization, Isotherm, and Kinetic Studies

Kahya,

Şen,

Berber

et al. 2024

ACS Omega

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The aim of this study was to compare the effect of modifying calcium bentonite (Bent-Ca) clay with two cationic polymers, chitosan (Chi) and polyethylenimine (PEI), on the removal of remazol black B (RB-B) dye from an aqueous solution. The samples were characterized by using scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The fractional factorial design of 2 (6−1) was applied to investigate the effects of pH, temperature, amount of adsorbent, initial dye concentration, contact time, and shaking rate on the adsorption process. To further optimize RB-B removal from an aqueous solution, a Box−Behnken design with three factors and a response surface methodology was used. The optimum conditions were a pH of 3.77, a temperature of 40.45 °C, and an initial RB-B concentration of 77.27 mg L −1 for Bent-Ca-Chi, whereas for Bent-Ca-PEI, the optimum conditions were a pH of 5.53, a temperature of 41.06 °C, and an initial dye concentration of 238.89 mg L −1 . To understand the adsorption behavior, the Langmuir and Freundlich isotherms were fitted to the experimental data. It was found that the Langmuir isotherm model matched well with the dye adsorption by Bent-Ca-Chi and Bent-Ca-PEI. The kinetics study was performed using three kinetic models: pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. Among these models, the RB-B dye kinetics were best represented by the pseudo-second-order model equation for the adsorbents.

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Highly Reusable Nano Adsorbent Based on Clay-Incorporated Hydrogel Nanocomposite for Cationic Dye Adsorption

Aljeboree,

Alkaim,

Alsultany

et al. 2024

J Inorg Organomet Polym

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Adsorption of single and mixed colors by kaolinite clay: Experimental research combined with a theoretical examination using DFT

Cited by 19 publications

References 39 publications

Efficient and Selective Adsorption of Cationic Dye Malachite Green by Kiwi-Peel-Based Biosorbents

Efficient and Selective Adsorption of Cationic Dye Malachite Green by Kiwi-Peel-Based Biosorbents

Comparison of Dye Adsorption of Chitosan and Polyethylenimine Modified Bentonite Clays: Optimization, Isotherm, and Kinetic Studies

Highly Reusable Nano Adsorbent Based on Clay-Incorporated Hydrogel Nanocomposite for Cationic Dye Adsorption

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