Browsing by Author "Benfarhi, Said"

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    Removal Of Lead Ions Using A Cellulose Acetate/ Zeolite Composite Membrane And Their Analyzes By Inverse Voltammetry
    (Oum-El-Bouaghi University, 2017) Chinar, Tahani-achouak; Benbouzid, Mohammed; Benfarhi, Said
    Zeolitic faujasite Y type was prepared from the crystallization of the gel resulting from the combination of the solutions of silica and alumina. Its structure was characterized by XRD, SEM, BET, ATR-FTIR, and elementary analysis. The composite membranes were prepared from a biodegradable polymer “cellulose acetate” serving as a matrix and different percentages of the synthesized faujasite Y. The filtrates obtained were analyzed by inverse voltammetry. The results showed that the retention of lead ions increased with increasing faujasite Y concentrations, and indicated an adsorption capacity of more than 50 % for the lead ions.
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    Zeolite Zsm-5 As A Filler For Pvc Membranes Used For The Removal Of Iron And Copper From Aqueous Solutions
    (Oum-El-Bouaghi University, 2018) Chinar, Tahani-achouak; Benbouzid, Mohammed; Benfarhi, Said
    In this study, a polyvinyl chloride (PVC) membrane impregnated with the zeolite ZSM-5 was used to remove Fe2+ and Cu2+ ions from aqueous solutions. The results obtained by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analyzes indicated that the zeolite produced by the hydrothermal method was a pure porous material. The prepared zeolite was then incorporated into the PVC to obtain composite films which behave as filters. These composite membranes were used for the removal of metal ions contained in aqueous solutions. The filtrates obtained were analyzed by atomic absorption spectroscopy. The results showed the existence of a selective retention of metal ions according to their ionic radii. It increases with the ionic radii (RFe: 55 μm, RCu: 73 μm), and which increased in general with the concentration of the ZSM-5 zeolite .