Adsorption of Acid Red 114 by facile prepared magnetic amino-nanoadsorbent: Kinetics, isotherms and thermodynamics studies

Galangash, Mohsen Mohammadi; Kolkasaraei, Zahra Niyazi; Ghavidast, Atefeh; Shirzad‐Siboni, Mehdi

doi:10.5004/dwt.2018.22578

Cited by 3 publications

(4 citation statements)

References 79 publications

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“…This isotherm model was applied in the following form: K f and 1/n f are Freundlich constant and adsorption intensity, respectively. The n f value in the range of 1-10 supports favorable adsorption behavior [2,4,46]. The highest correlation coefficient value of this model demonstrates a suitable fit among the other models.…”

Section: Effects Of Dye Concentration and ıSotherm Studiesmentioning

confidence: 68%

N, S doped carbon quantum dots inside mesoporous silica for effective adsorption of methylene blue dye

et al. 2021

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This study aimed to develop non-metal elements for doping carbon quantum dots (CQDs) with nitrogen and sulfur (N, S-CQDs), which loaded inside hexagonal mesoporous silica (HMS) in order to effectively remove methylene blue dye (MB) from an aqueous solution. The histidine and cysteine amino acids were used as the source for synthesis N, S-CQDs through the hydrothermal method. Morphology and structure of the N, S-CQDs, and adsorbent (N, S-CQDs/HMS) were characterized by using different microscopic and spectroscopic techniques. The adsorption parameters such as adsorbent dosage (0.25–1 g/L), pH (2–10), contact time (15–75 min), and initial MB dye concentration (20–300 mg/L) were investigated. The maximum adsorption capacity and removal efficiency of MB were determined at 370.4 mg/g and 97%, respectively, under optimum conditions at 303 K. The adsorption isotherm studies were fitted with the Freundlich isotherm equation, and the dye removal kinetics of the adsorbent followed the pseudo-second-order model. Thermodynamic studies showed that the adsorption process had exothermic and spontaneous behavior. The removal of MB next to the Rhodamine B and Reactive Black 5 dyes indicated that the N, S-CQDs/HMS had excellent selective behavior for MB absorption. This prepared adsorbent could be well recycled with suitable activity after four repeated adsorption–desorption cycles. Results revealed that the porous characters, surface area, charge properties, reduction in the bandgap, and quantum yield of the N, S-CQDs/HMS were essential factors that affected dye adsorption.

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Section: Effects Of Dye Concentration and ıSotherm Studiesmentioning

confidence: 68%

N, S doped carbon quantum dots inside mesoporous silica for effective adsorption of methylene blue dye

et al. 2021

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“…This study yielded a maximum experimental q e of 152.5 mg g À1 , which was higher as compared to many previously reported magnetite sorbents. 9,12,38 Contact time study revealed the attainment of adsorption equilibrium within 45 min or less ( Fig. S5 and S6 †).…”

Section: Dye Adsorption Analysismentioning

confidence: 98%

Convenient pH-responsive removal of Acid Black 1 by green l-histidine/iron oxide magnetic nanoadsorbent from water: performance and mechanistic studies

et al. 2019

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“…[59] The calculated isotherm parameters of two anionic dyes from both models are shown in Table 2. [60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79] Though Fe 3 O 4 @SiO 2 -TRIS has a large number of terminal hydroxyl groups, their maximum dye binding capacity is less than that of Fe 3 O 4 @SiO 2 -MPAP [41] and Fe 3 O 4 @SiO 2 -NH 2. It indicates that the adsorption occurs at specific homogeneous sites within the adsorbent, forming a monolayer coating of the dye at the surface of the adsorbent.…”

Section: Adsorption Isotherm Studiesmentioning

confidence: 99%

“…The adsorption of two dyes AR-114 and RB-5 fitted to the Langmuir isotherm model better than the Freundlich model with a higher R 2 value. [68,69] It can be because one dye molecule reacted very likely with several terminal hydroxyl groups on the particle surface and the active sites of the adsorbent were overloaded. The Freundlich constant 1/n of AR-114 and RB-5 dyes was less than 1, indicating high adsorption intensity ( Table 2).…”

Section: Adsorption Isotherm Studiesmentioning

confidence: 99%

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

Galangash

Ghavidast

Bozorgpanah

2018

J Chinese Chemical Soc

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The adsorption of the dyes Acid Red 114 and Reactive Black 5 in aqueous solutions on polyhydroxyl dendrimer magnetic nanoparticles (Fe3O4@SiO2‐TRIS) was studied in a batch system. The Fe3O4@SiO2‐TRIS NPs were characterized by Fourier transform infrared spectroscopy, X‐ray diffraction, and transmission electron microscopy. Experiments were performed under different conditions such as the initial dye concentration, adsorbent dose, and pH. The pseudo‐second‐order model provided a very good fit for the two anionic dyes. The Langmuir and Freundlich adsorption models were used to describe the equilibrium isotherms at different temperatures, and the former agreed very well with the experimental data. However, the adsorption capacity of Fe3O4@SiO2‐TRIS NPs was reduced during surface modification, which could be due to the dye occupying the binding sites of the dendrimer. Thermodynamic parameters, namely the change in free energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0), were also determined.

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Adsorption of Acid Red 114 by facile prepared magnetic amino-nanoadsorbent: Kinetics, isotherms and thermodynamics studies

Cited by 3 publications

References 79 publications

N, S doped carbon quantum dots inside mesoporous silica for effective adsorption of methylene blue dye

N, S doped carbon quantum dots inside mesoporous silica for effective adsorption of methylene blue dye

Convenient pH-responsive removal of Acid Black 1 by green l-histidine/iron oxide magnetic nanoadsorbent from water: performance and mechanistic studies

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

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