Magnetized chitosan nanocomposite as an effective adsorbent for the removal of methylene blue and malachite green dyes

Mashkoor, Fouzia; Nasar, Abu; Jeong, Changyoon

doi:10.1007/s13399-021-02282-3

Cited by 51 publications

(3 citation statements)

References 73 publications

(64 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 4 a, with the temperature increasing, the adsorption capacities of NA-KP presented a tendency to increase, which illustrates the endothermic nature of the adsorption process. Moreover, the thermodynamic factors, including free energy change (ΔG°), enthalpy change (ΔH°), and entropy change (ΔS°), were calculated by the following Van ’t Hoff equations:

where K c is the adsorption distribution coefficient (L g −1 ), R is the universal gas constant (8.314 J mol −1 K −1 ), and T is the temperature (K) [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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

Zhao

Liu

et al. 2023

Molecules

View full text Add to dashboard Cite

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.

show abstract

where K c is the adsorption distribution coefficient (L g −1 ), R is the universal gas constant (8.314 J mol −1 K −1 ), and T is the temperature (K) [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

“…where K c is the adsorption distribution coefficient (L g −1 ), R is the universal gas constant (8.314 J mol −1 K −1 ), and T is the temperature (K) [44]. The linear fitting of lnKc vs. 1/T is shown in Figure 4b, and the calculated thermodynamic parameters of MG adsorption onto NA-KP are presented in Table 3.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

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

Zhao

Liu

et al. 2023

Molecules

View full text Add to dashboard Cite

show abstract

“…Water shortage is one of the most serious problems that our planet is currently dealing with [1,2], and it is becoming increasingly severe. The world population is predicted to reach over 40 percent by 2050, with over 40 percent of the world's population living in areas of serious water scarcity [2].…”

Section: Introductionmentioning

confidence: 99%

Adsorption kinetics behavior of MB dye on CaO nanosheets

Modwi,

Aissa,

Alakhras

et al. 2024

JOR

View full text Add to dashboard Cite

The work reported herein demonstrates the fabrication of CaO nanosheets employing a thermal decomposition method. The obtained CaO nanosheets were characterized using TEM, BET, XRD, EDX, and FTIR instruments. Moreover, the effect of initial dye concentration and pH on MB removal by CaO nanosheets was studied. The result showed that the nanoparticles have sizes around 100 nm, and the CaO nanosheets have an average diameter of 50 nm. Meanwhile, the average pore diameter and surface area of CaO are 15.847 Å and 5.881 m2. g−1 , respectively. Numerical models based on Temkin, Freundlich, and Langmuir were applied to adsorption data to better understand the MB dye adsorption onto CaO nanoparticles. The sorption findings demonstrated a stronger fit with the Temkin model (R2 = 0.983) compared to the Freundlich model (R2 = 0.947) and Langmuir model (R2 = 0.968). The maximum adsorption capacity of MB on the CaO nanoparticles is 688.01 mg/g. The investigation determined that the adsorption kinetics adhered to the Pseudo-second-order kinetic model(R2 =0.982).

show abstract

Synthesis of a novel green biopolymer-based composites beads for removal of methylene blue from aquatic medium: isotherm, thermodynamic and kinetic investigation

Parlayici,

Aras

2024

Polym. Bull.

View full text Add to dashboard Cite

The increase in the world population and the decrease in clean water resources increase people's interest in water purification technologies. Many industries, such as the textile industry, leather industry, cosmetics and food industry, color their products with substances such as dyes and pigments. In this study, a cheap, useful, innovative, environmentally friendly, and sustainable adsorbent was developed for the removal of Methylene Blue (MB), one of the dyes that is harmful to the environment. In fruit tree cultivation, in addition to the product, very high amounts of by-products/waste (branches, bark, leaves, fruit seeds, fruit shells, etc.) are produced. In this direction, walnut tree and olive tree wastes were immobilized with chitosan, made magnetic (m-WCH and m-OCH), and the adsorption of MB on the developed adsorbents was examined in a batch system. Characterization of the synthesized biocomposite adsorbents was performed by FT-IR, SEM, EDX and XRD analyzes. It has been thoroughly described how the pH solution of the MB dye compares to the pHPZC of the adsorbent surface. The pHPZC values for m-WCH and m-OCH were 5.2 and 5.5 respectively. MB adsorption of biocomposites depends on the pH of the environment (3–8), amount of adsorbent (2–10 gL−1), contact time (5–360 min), temperature (25–55 °C) and initial dye concentration (10–250 ppm) was examined as a function. The obtained data were evaluated with kinetic and isotherm models. Using adsorption equilibrium data obtained from MB adsorption studies using m-WCH and m-OCH biocomposite adsorbents, their suitability to Langmuir, Freundlich, Stachard, Dubinin–Radushkevich and Temkin models was examined. The empirical data of MB adsorption by m-WCH and m-OCH showed agreement with the Langmuir isotherm model. The maximum adsorption capacity for MB by m-WCH and m-OCH was estimated to be 85.47 mg g−1 and 53.48 mg g−1, respectively. The result showed that a higher adsorption selectivity on m-WCH compares to m-OCH. Among the kinetic models applied, the pseudo-second-order kinetic model was identified with the highest regression coefficients. In the light of these results, it was determined that there are new promising adsorbents of natural origin, with higher adsorption capacity, lower cost, and alternatives to commercially used adsorbents in the removal of MB from aqueous media. Graphical abstract

show abstract

Magnetized chitosan nanocomposite as an effective adsorbent for the removal of methylene blue and malachite green dyes

Abstract: Magnetized chitosan nanocomposite as an effective adsorbent for the removal of methylene blue and malachite green dyes

Cited by 51 publications

References 73 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

Adsorption kinetics behavior of MB dye on CaO nanosheets

Synthesis of a novel green biopolymer-based composites beads for removal of methylene blue from aquatic medium: isotherm, thermodynamic and kinetic investigation

Contact Info

Product

Resources

About