Department of Material Sciences

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Author: search.filters.author.Yamina BerredjemAuthor: search.filters.author.Abdelhak GheidAuthor: search.filters.author.Radia ZerdoumHas files: Yes

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    Removal of methylene blue from water using eggshell membrane fixed bed
    (Desalination and Water Treatment, 2017-01-16) Radia Zerdoum; Zhour Hattab; Yamina Berredjem; Radia Mazouz; Ridha Djellabi; Naima Filali; Abdelhak Gheid; Kamel Guerfi
    The purpose of this work was to remove methylene blue (MB) from water using natural eggshell membrane (ESM) in fixed-bed column. The ESM was treated and characterized by Fourier transform infrared spectra (FTIR), scanning electron microscope (SEM) and X-ray diffraction (XRD). A series of experiments were carried out to investigate the effects of bed height on breakthrough curve, flow rate, MB concentration, solution pH (2–10), the ionic strength and temperature on the adsorption behavior. The experimental results show that the adsorption capacity increases with the increase in the bed depth and MB concentration. However, it decreases with increasing the flow rate and temperature. The ESM adsorption capacity of MB is more pronounced in basic medium. The addition of NaCl salt ions decreases the fixation of MB on ESM. Five kinetic models, Bohart–Adams, Wolborska, Thomas, Yoon–Nelson and bed depth service time (BDST) models were applied to experimental data in order to predict the breakthrough curves using non-linear regression and to determine the characteristic parameters of the column useful for process design. The results showed that Thomas and Yoon–Nelson models were found suitable for the normal description of breakthrough curve at the experimental condition, while Adams–Bohart and Wolborska models were only for an initial part of dynamic behavior of the ESM column. Desorption of MB from ESM bed was performed with distilled water as the desorbing agent, and reuse study was investigated.
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    Utilization of Powdered Eggshell Waste for Rhodamine B Removal: Evaluation of Adsorptive Efficiencies and Modeling Studies
    (American Scientific Publishers, 2018-02-03) Wahiba Bessashia; Zhour Hattab; Yamina Berredjem; Ridha Djellabi; Radia Zerdoum; Assia Allaoui; Abdelhak Gheid; Kamel Guerfi
    Biomass wastes are being recognized as emerging functional platforms that can be utilized in various fields. Eggshell, which can be found everywhere due to the large eggs consumption, has usually been regarded as waste and overlooked. In this contribution, we report the use of three powders prepared from eggshell waste such as Eggshell without membrane (ES), Eggshell membrane (ESM) and Eggshell with membrane (ESM-ES) as biosorbents for the removal of Rhodamine B (RhB) from water. Biosorbent powders were characterized by XRD, SEM, BET and FTIR. The effects of initial RhB concentration, temperature and pH on dye adsorption were performed. The results showed that the ESM, due to its 3D network porous structure, exhibited the highest adsorption efficiency than ES and ES-ESM. The RhB sorption on these adsorbents obeys pseudo-second-order kinetics which indicates a chemisorption process. For ESM adsorbent, the Freundlich isotherm model has a best-fit compared to Langmuir and Temkin isotherm models (multilayer dye adsorption with non-uniform distribution). However, for ES and ESM-ES adsorbents Langmuir has a best-fit than the other models (monolayer dye adsorption).