HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Physical meaning of the parameters used in fractal kinetic and generalised adsorption models of Brouers-Sotolongo

Abstract : The aim of the present study was to clarify the physical meaning of the parameters used in fractal kinetic and generalised isotherm models of Brouers-Sotolongo. For this purpose, adsorption of methylene blue (MB) and methyl orange (MO) onto four activated carbons (ACs) was carried out. These ACs were characterised in terms of composition, surface area, pore volumes and pore size distributions, carbon nanotexture and surface chemistry. Adsorption isotherms were carried out at 25°C, and at pH 2.5 and 8 for MO and MB, respectively, and fitted with Langmuir, Freundlich, Jovanovich, Hill-Sips (HS), Brouers-Sotolongo (BS), Brouers-Gaspard (BG) and General Brouers-Sotolongo (GBS) models. Adsorption kinetics were fitted by traditional pseudo-first and pseudo-second order models and compared to the Brouers-Sotolongo (BSf) fractal kinetic model. GBS and BSf were found to be the best models describing adsorption isotherms and kinetics, respectively. This finding suggests that MB and MO adsorption is probabilistic and closely correlated to the heterogeneous character of the adsorbent surface. Moreover, BSf and GBS parameters were correlated with surface area and amount of surface functional groups. In particular, higher surface area and amount of functional groups respectively decreased and increased the constants τ c and α of the BSf stochastic model.
Complete list of metadata

https://hal.univ-lorraine.fr/hal-03563515
Contributor : Maria Vanessa Fierro Pastor Connect in order to contact the contributor
Submitted on : Wednesday, February 9, 2022 - 5:34:04 PM
Last modification on : Friday, February 11, 2022 - 3:43:06 AM
Long-term archiving on: : Tuesday, May 10, 2022 - 7:14:31 PM

Identifiers

Collections

Citation

Taher Selmi, Mongi Seffen, Habib Sammouda, Sandrine Mathieu, Jacek Jagiello, et al.. Physical meaning of the parameters used in fractal kinetic and generalised adsorption models of Brouers-Sotolongo. Adsorption - Journal of the International Adsorption Society, Springer Verlag, 2018, 24 (1), pp.11-27. ⟨10.1007/s10450-017-9927-9⟩. ⟨hal-03563515⟩

Share

Metrics

Record views

2

Files downloads

9