Modeling of phenol adsorption isotherm onto activated carbon by non-linear regression methods: models with three and four parameters

Tchuifon, Donald Raoul Tchuifon; Ndifor-Angwafor, George Nche; Bopda, Aurelien; Anagho, Solomon Gabche

doi:10.5004/dwt.2018.22898

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…On the basis of the average percentage error values (Table 9), the Baudu equation of seems better than that of Fritz-Schlunder and Marczewski-Jaroniec. The values of the maximum adsorption capacity obtained using all the three fourparameter isotherms are lower than those calculated from the Langmuir model (Tchuifon et al, 2018). Therefore, by comparison, the order of the isotherm best fits the four sets of experimental data in this study is Baudu > Jovanovic > Marczewski-Jaroniec > Fritz-Schlunder.…”

Section: Three-parameter Modelsmentioning

confidence: 53%

Non-linear equilibrium and kinetic study of the adsorption of 2,4-dinitrophenol from aqueous solution using activated carbon derived from a olives stones and cotton cake

Bopda¹,

Tchuifon²,

Ndifor-Angwafor³

et al. 2019

Afr. J. Environ. Sci. Technol.

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Olives stones and cotton cakes have been investigated as a cheap and available precursor used for the production of novel carbon using potassium hydroxide as chemical activating agent with 2:1 impregnation ratio at 1.5 M KOH. Carbonization was performed at 450°C for one hour. The activated carbons NOK and MK3 were characterized by Iodine Number, Fourier Transform Infrared (FTIR) spectroscopy, EDX Analysis, Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) Analysis and Proximate Analysis (pH ZCN , pH, volatile matter, fixed carbon). The effects of initial sorbate concentration and contact time on adsorption were evaluated. Errors analysis methods were used to evaluate the experimental data: Correlation coefficient (R 2), chi-square (χ 2), average relative error (ARE), sum of absolute errors (EABS) and root mean square error (RMSE) values were tested to find the best fitting isotherm. Elovich models provide the best fit in the uptake of 2,4-dinitrophenol by activated carbons NOK and MK3. Thus, among the isotherm models studied, it appears that the Dubinin-Radushkevich and Temkin (two parameters), Sips (three parameters) and Baudu (four parameters) models describe better the adsorption data. Error analysis showed that the models with two parameters better described the adsorption of 2,4-diniphenol data compared with the three parameter and fourparameter models.

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Section: Three-parameter Modelsmentioning

confidence: 53%