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Titre: | Removal of brilliant green (BG) by activated carbon derived from medlar nucleus (ACMN) – Kinetic, isotherms and thermodynamic aspects of adsorption |
Auteur(s): | Abbas, Moussa |
Mots-clés: | Kinetic isotherm adsorption, thermodynamic Nefles nucleus, brilliant green modeling |
Date de publication: | 2020 |
Editeur: | SAGE |
Collection/Numéro: | Adsorption Science & Technology 2020;Vol. 38(9–10) 464–482 |
Résumé: | Experimental investigations were undertaken to adsorb Brilliant Green (BG) a toxic dye from
aqueous medium using activated carbon derived from the medlar nucleus (ACMN). The adsorp-
tion was used to remove BG using ACMN as bio-adsorbent to replace activated carbon still
expensive. The prepared adsorbent was characterized by the BET surface area measurement,
FTIR spectroscopy and X-ray diffraction. Various parameters such as the initial dye concentration
(110–200 mg/L), adsorbent dose (1–6 mg/L), initial pH (2–9) and temperature (298–318 K) were
studied to observe their effects on the BG adsorption. Batch studies were conducted in order to
determine the optimal parameters required to reach the adsorption equilibrium. The maximum
adsorption capacity of ACMN for the BG adsorption at 298 K was found to be 833.15 mg/g. The
adsorption kinetic data were analyzed by using several kinetic models namely the pseudo-first-
order, pseudo-second-order, Elovich equation, intraparticules diffusion model. It was established
that the adsorption obeys the pseudo-second-order kinetic model. The evaluation of thermo-
dynamics parameters such as the free energy
D
G
(
10.584 to
6.413 kJ/mol), enthalpy
D
H
(36.439 kJ/mol) and the change of entropy (0.1438 kJ/mol K) indicated a spontaneous and endo-
thermic nature of the reaction with a chemisorption process. The present adsorbent may be
considered as an alternative for the better performance of the BG removal from aqueous
medium. |
Description: | From January 2021, Adsorption Science and Technology will be published and hosted by Hindawi as part of a partnership between SAGE and Hindawi |
URI/URL: | https://doi.org/10.1177/0263617419864504 https://journals.sagepub.com/doi/full/10.1177/0263617420957829 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/5944 |
ISSN: | Print: 0263-6174 Electronic 2048-4038 |
Collection(s) : | Publications Internationales
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