Langmuir, Freundlich, Temkin and Dubinin–radushkevich Isotherms Studies of Equilibrium Sorption of Ampicilin unto Montmorillonite Nanoparticles

Balarak, Davoud; Mostafapour, Ferdos Kord; Azarpira, Hossein; Joghataei, Ali

doi:10.9734/jpri/2017/38056

Cited by 84 publications

(39 citation statements)

References 19 publications

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“…This may be due to the decrease in the total adsorption surface area available to SMZ from overlapping or aggregation of adsorption sites [33,34]. A similar result of the sorbent dose effect was also reported for the removal of antibiotics by nano carbon and nano particles [35,36].…”

Section: Resultssupporting

confidence: 66%

Error Analysis of Adsorption Isotherm Models for Sulfamethazine onto Multi Walled Carbon Nanotubes

Balarak

Salari

2019

JPRI

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In the present study, Multi walled carbon nanotubes (MWCNTs) was used for the adsorption of Sulfamethazine (SMZ) antibiotics. The adsorbent was characterized by scanning electron microscopy, surface area (BET) and transmission electron microscopy. Batch experiments were carried out by varying the parameters like contact time, adsorbent dosage and initial Sulfamethazine concentration at fixed pH and temperature. The equilibrium data were tested with Langmuir, Freundlich, Tempkin, Dubinin–Radushkevich (D–R), Redlich-Peterson (R-P), Sips, Toth and Khan isotherm models at five Error Analysis EABS, X2, ARE, RMSE and SD and it was found that the Langmuir and Toth isotherms best ﬁtted the adsorption of SMZ with highest value of R2 and lowest overall experimental error. Also according to the results, a maximum removal efficiency of 99.1% was obtained at pH of 7 and the contact time of 60 min; initial SMZ concentration 20 mg/L and adsorbent dose 0.8 g/L.

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Section: Resultssupporting

confidence: 66%

Error Analysis of Adsorption Isotherm Models for Sulfamethazine onto Multi Walled Carbon Nanotubes

Balarak

Salari

2019

JPRI

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“…From the Freundlich model, the relative adsorption capacities (n) and sorption intensities (Kf) (mg/gm) were calculated from the slope and intercept of plotting logQt vs. log Ct (Figure 12b). The values were n = 2.08, indicating a favorable sorption process as n > 1 [34], and Kf = 3.55 mg/g with a correlation coefficient (R 2 = 0.966). Temkin constants, BT (k J/mol) and KT (L/mg), which are constants of heat of sorption and the equilibrium binding constant corresponding to maximum binding energy, were estimated from the slope and intercept of Qt vs. ln Ct (Figure 12c).…”

Section: Modeling Of Adsorptionmentioning

confidence: 98%

A SnO2/CeO2 Nano-Composite Catalyst for Alizarin Dye Removal from Aqueous Solutions

et al. 2020

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A new SnO2/CeO2 nano-composite catalyst was synthesized, characterized and used for the removal of alizarin dyes from aqueous solutions. The composite material was prepared using a precipitation method. X-ray powder diffractometry (XRD), high resolution transmission electron microscopy (HR-TEM), Brunauer–Emmett–Teller methodology (BET) and Fourier Transform Infrared Spectrometry (ATR-FTIR) were utilized for the characterization of the prepared composite. The prepared nano-composite revealed high affinity for the adsorption and decomposition of alizarin dyes. The adsorption capacity under different experimental conditions (adsorbate concentration, contact time, adsorbent dose and pH) was examined. Under optimized experimental conditions, the removal of alizarin yellow, alizarin red and alizarin-3-methylimino-diacetic acid dyes from aqueous solutions was about 96.4%,87.8% and 97.3%, respectively. The adsorption isotherms agreed with the models of Langmuir, Freundlich and Temkin isotherms.

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“…4" in the coordinates of the linearized Langmuir equation [6] is characteristic for the description of adsorption processes on heterogeneous surfaces. Within the framework of the linearized Freundlich model [7] " Fig. 5" at temperatures of 298, 318, and 338 K, the experimental points fit well into straight lines, which indicates the adequacy of this model for describing the adsorption of platinum(IV).…”

Section: Resultsmentioning

confidence: 64%

Composite Polymer-Silicone Adsorbent for Platinum (IV) Ions: Investigation of Models and Absorption Kinetics

Лебедева¹,

Pozhidaev²,

Konovalenko³

et al. 2018

Proceedings of the International Symposium “Engineering and Earth Sciences: Applied and Fundamental Research” (ISEES 2018)

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The adsorption of platinum (IV) in hydrochloric acid solutions of a composite based on N,N-bis(3triethoxysilylpropyl)thiourea and 4-vinylpyridine-2-hydroxyethylethacrylate copolymer is studied. The value of the static adsorption capacity of the composite for platinum(IV) is found to be 215 mg/g. To describe the nature of the adsorption, Langmuir, Freundlich, and Dubinin-Radushkevich models are used. The adsorption kinetics is estimated using Boyd-Adamson models of pseudo-first and pseudo-second order and the Elovich equation.

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Langmuir, Freundlich, Temkin and Dubinin–radushkevich Isotherms Studies of Equilibrium Sorption of Ampicilin unto Montmorillonite Nanoparticles

Cited by 84 publications

References 19 publications

Error Analysis of Adsorption Isotherm Models for Sulfamethazine onto Multi Walled Carbon Nanotubes

Error Analysis of Adsorption Isotherm Models for Sulfamethazine onto Multi Walled Carbon Nanotubes

A SnO2/CeO2 Nano-Composite Catalyst for Alizarin Dye Removal from Aqueous Solutions

Composite Polymer-Silicone Adsorbent for Platinum (IV) Ions: Investigation of Models and Absorption Kinetics

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