Publications Scientifiques

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    Phosphate removal from water using activated carbon derived from ampelodesmos mauritanicus stems : equilibrium and kinetic studies
    (Desalination Publications, 2021) Benhathat, Amal; Amrani, M.
    This paper describes the synthesis and characterization of Ampelodesmos mauritanicus stem-derived activated carbon (AMSAC). The activated carbon was produced by phosphoric acid activation followed by carbonisation and was characterized by N2 adsorption–desorption isotherm, scanning electron microscopy, energy-dispersive X-ray analysis, and Fourier-transform infrared (FTIR) spec-troscopy. The sorption potential of AMSAC for the removal of phosphate ions from the water was investigated. The effects of contact time, initial pH, and initial phosphate concentration on the sorption process were studied. The optimum contact time and pH for removal of phosphate ions was 75 min and pH 6–7. The experimental data showed that AMSAC had a high Brunauer–Emmett–Teller surface area of 1,293 m2/g and abundant pores with a specific volume of 1.23 m3/g. FTIR analysis revealed various functional groups on the surface of the AMSAC, which can play an important role in the adsorption process. A Langmuir isotherm model fits the equilibrium data for the sorbent well compared to the Freundlich, Temkin, and Dubinin–Radushkevich isotherm models. The monolayer −3 sorption capacity of AMSAC for PO4 ions was determined to be 4.52 mg/g at 25°C. The experimental data were also modelled using the sorption kinetic models. It was found that the kinetic data were described better by the pseudo-second-order adsorption kinetic model. Therefore, AMSAC is a prom-ising low-cost phosphate sorbent that can be produced from plentiful and annually renewable plants
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    Structural, optical, properties of czts layers deposited by spray pyrolysis technique
    (2015) Tala-Ighil, Razika; Haouanoh, Djedjiga; Toubane, Mahdia; Bensouici, Fayçal; Samantilleke, Anura Priyajith; Slimani, Amel
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    The study of the improvement of mechanical performance of asphalt modified by the optimization of mixing time of EVA bitumen
    (American Institute of Physics, 2011) Saoula, S.; Haddadi, S.; Mokhtar, K.A
    To improve the performances of a bitumen, the mixing time of bitumen-EVA is studied using two contents of EVA (3 and 5%). For the study analytical and chemical tests are carried out such as penetrability, softening point, ductility, FTIR, DSC, MEB and the storage stability. The aim of this work is to change and optimize the formula of the sample of EVA, which are not conform with the Algerian standards. This work showed that the mixing time is function of the content polymer. The mixing time has a strong effect on the properties; in fact it has improved the mechanical characteristics of the bituminous. Also, the mechanical tests showed that the permanent deformations and the indirect tensile strength at the temperatures of service resistances are improved.
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    Chemical production and characterisation of activated carbon from waste 'coffee grounds'
    (Inderscience Enterprises, 2013) Mekarzia, A.; Namane, A.; Benrachedi, K.; Belhaneche-Bensemra, Naima