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Élaboration de nouveaux supports d’adsorption pour la dépollution des eaux.

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dc.contributor.author Boukerzaza, Moufida Imene
dc.contributor.author Kebabi, Brahim
dc.date.accessioned 2022-12-19T08:47:21Z
dc.date.available 2022-12-19T08:47:21Z
dc.date.issued 2022-06-21
dc.identifier.uri http://depot.umc.edu.dz/handle/123456789/13652
dc.description.abstract This work aims to study and model the sorption of boron and rhodamine B, from their aqueous solutions, by a natural, unconventional, low-cost and locally available biomaterial: olive pomace. The effects of the operating parameters (pH, contact time, pollutant concentration, mass of the adsorbent and the temperature of the medium) on the sorption of these pollutants have been studied and discussed. The adsorption of boron by olive pomace is an exothermic phenomenon which increases with increasing pH, reaches a maximum around pH 8.5 and decreases with further increase in pH. The results obtained relating to the kinetics and the adsorption isotherms were used to clarify the mode of attachment of the pollutant to the adsorbent. Sorption studies revealed that pseudo-first-order isothermal and Langmuir models are the most suitable to describe boron adsorption kinetics and their equilibrium, respectively. Analysis of the experimental results reveals that the adsorption of rhodamine B by olive pomace conforms to the Langmuir adsorption isotherm model. Moreover, the pseudosecond-order kinetic model is the most suitable for describing the phenomenon. The adsorption capacity of olive pomace in rhodamine-B remains controlled by the conditions of implementation. Kinetic studies have shown that the sorption process reaches equilibrium after 120 minutes. The maximum rhodamine sorption capacity by olive pomace is 79.8 mgg- 1. This result is achieved at 285 K, a pH of 4 and with a contact time of 120 minutes. The study by infrared spectroscopy demonstrates that the adsorption of boron on olive pomace involves the superficial hydroxyl groups of the adsorbent as binding sites. Similarly, comparison of the FTIR spectra of OP before and after RhB adsorption provides direct evidence for the involvement of surface hydroxyl, carboxyl, and amino functional groups in RhB binding. fr_FR
dc.language.iso fr fr_FR
dc.publisher Université Frères Mentouri - Constantine 1 fr_FR
dc.subject Chimie: Chimie Analytique et Environnement fr_FR
dc.subject Chimie Analytique et Environnement : Traitement des Eaux fr_FR
dc.subject Bore fr_FR
dc.subject Rhodamine B fr_FR
dc.subject Biosorption fr_FR
dc.subject Grignon d’olive fr_FR
dc.subject Cinétique d’adsorption fr_FR
dc.subject Boron fr_FR
dc.subject Olive pomace fr_FR
dc.subject Sorption kinetics fr_FR
dc.subject البور fr_FR
dc.subject الرودامين ب fr_FR
dc.subject الامتزاز fr_FR
dc.subject ثفل الزيتون fr_FR
dc.subject حركية الامتزاز fr_FR
dc.title Élaboration de nouveaux supports d’adsorption pour la dépollution des eaux. fr_FR
dc.type Thesis fr_FR

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