Adsorption of Chromium Using Blue Green Algae-Modeling and Application of Various Isotherms

Ramadoss, Ramsenthil; Subramania, Dhanasekaran

doi:10.3923/ijct.2018.1.22

Cited by 25 publications

(3 citation statements)

References 79 publications

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“…The 3-p Radke-Prausnitz model is basically applied for broad range of concentration and is widely used for adsorption systems at low concentration (Ramadoss and Subramaniam, 2018). It is expressed as:…”

Section: -P Radke-prausnitz Isothermmentioning

confidence: 99%

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Isotherms, kinetic and thermodynamic studies of methylene blue adsorption on chitosan flakes derived from African giant snail shell

Olaosebikan¹,

Victor²,

Kehinde³

et al. 2022

Afr. J. Environ. Sci. Technol.

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In the present study, modeling of 19 adsorption isotherms, 8 kinetic models and thermodynamics of methylene blue (MB) adsorption on chitosan flakes synthesized using Archachatina marginata shell wastes was investigated in a batch mode. The operational parameters' effects on the MB adsorption were studied. The model parameters were statistically analyzed using 10 error functions. The choices of the best fitted adsorption and kinetic models were based on the comparison of the sum of normalized error (SNE) and two statistical tools of information-based criteria. The 5-p Fritz-Schlüender isotherm best fitted the experimental adsorption data of MB on chitosan flakes based on SNE whereby maximum adsorption capacity, ax m q , of 143.6660 mg/g was obtained. The adsorption rate of MB on chitosan flakes was kinetically described by pseudo second-order model at all initial concentrations of MB investigated, with film diffusion being the rate-controlling step and the adsorption process chemisorption-influenced. The calculated thermodynamic parameters, 0 H  = 4.23 kJ/mol, 0 S  = 0.4563 kJ/(mol K), negative 0 G  values revealed that the adsorption of MB onto chitosan flakes was physical, endothermic, spontaneous, energetically favorable and exergonic. The reaction mechanism of the adsorption of MB onto chitosan flakes was proposed taking cognizance of the electrostatic force of attraction between the negatively charged surface of the chitosan (biosorbent) and the positively charged MB.

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Section: -P Radke-prausnitz Isothermmentioning

confidence: 99%

“…The 3-p Fritz-Schlüender isotherm is a model that incorporates the features of Langmuir and Freundlich isotherms and it utilizes three parameters that fit a wide range of experimental data. It is expressed as (Ramadoss and Subramaniam, 2018):…”

Section: -P Fritz-schlüender Isothermmentioning

confidence: 99%

Isotherms, kinetic and thermodynamic studies of methylene blue adsorption on chitosan flakes derived from African giant snail shell

Olaosebikan¹,

Victor²,

Kehinde³

et al. 2022

Afr. J. Environ. Sci. Technol.

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show abstract

“…The Freundlich isotherm was designated to be applicable to an adsorption process that takes place on heterogeneous surfaces. The expression that the isotherm gives describes the surface heterogeneity as well as the distribution and energies of the active sites [35]. The Toth isotherm is another empirical modification of the Langmuir equation, with the purpose of reducing the difference between experimental data and the predicted value of equilibrium data.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Solketal Removal from Aqueous Solutions Using Activated Carbon and a Metal–Organic Framework as Adsorbents

2021

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The worldwide rise in biodiesel production has generated an excess of glycerol, a byproduct of the process. One of the most interesting alternative uses of glycerol is the production of solketal, a bioadditive that can improve the properties of both diesel and gasoline fuels. Even with its promising future, not much research has been performed on its toxicity in aqueous environments. In this work, solketal adsorption has been tested with two different commercial adsorbents: an activated carbon (Hydrodarco 3000) and a metal–organic framework (MIL-53). Diclofenac and caffeine were also chosen as emerging contaminants for comparison purposes. The effect of various parameters, such as the adsorbent mass or initial concentration of pollutants, has been studied. Adsorption kinetics with a better fit to a pseudo-second-order model, intraparticle diffusion, and effective diffusion coefficient were studied as well. Various isotherm equation models were employed to study the equilibrium process. The results obtained indicate that activated carbon is more effective in removing solketal from aqueous solutions than the metal–organic framework.

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Removal of Nutrients, Organic Matter and Total Suspended Solids from River Water by Adsorption on Chicken Eggshell

Low

Chang

Loo

2022

Lecture Notes in Civil Engineering

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Adsorption of Chromium Using Blue Green Algae-Modeling and Application of Various Isotherms

Cited by 25 publications

References 79 publications

Isotherms, kinetic and thermodynamic studies of methylene blue adsorption on chitosan flakes derived from African giant snail shell

Isotherms, kinetic and thermodynamic studies of methylene blue adsorption on chitosan flakes derived from African giant snail shell

Solketal Removal from Aqueous Solutions Using Activated Carbon and a Metal–Organic Framework as Adsorbents

Removal of Nutrients, Organic Matter and Total Suspended Solids from River Water by Adsorption on Chicken Eggshell

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