Publications Nationales

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    Removal of methylene blue in aqueous solution by oxidation with hydrogen peroxide in presence of copper-impregnated activated alumina
    (Aljest, 2019) Bousalah, Djedjiga; Yeddou, A. R.; Hachemi, M.; Nadjemi, B.
    In this work, methylene blue in aqueous solution is removed by oxidation with hydrogen peroxide in the presence of copper impregnated activated alumina. After preparation and characterization of the catalyst, the catalytic oxidation tests are performed. The effects of pH, H2O2 concentration, catalyst dose, and temperature have been investigated. The tests show that adding activated alumina increases significatively the degradation effeciency of methylene blue. The reuse of catalyst for four cycls shows a good catalytic stability. The elevation of the temperature affects positively the kinetics of degradation. The acidified medium increases the decolorization efficiency of dye.
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    A convenient synthesis of pyrandione derivatives using P-toluenesulfonic acid as catalyst under ultrasound Irradiation
    (2016) Benosmane, Nadjib; Boutemeur, B.; Hamdi, S.M.; Hamdi, M.
    A new series of 3,3'-{alkane-α,ω-diylbis[imino-eth-1-yl-1-ylidene]}bis(6-methyl-2H-pyran- 2,4(3H)-dione) derivatives (3c-e) has been synthesized by the convenient ultrasound-mediated condensation of a diamine with dehydroacetic acid in the presence of a catalytic amount of p- toluenesulfonic acid. The structure of all synthesized compounds was elucidated by IR spectroscopy, 1H NMR spectroscopic spectra, elemental analysis, and mass spectroscopy. A tautomeric form for the derivatives species is also proposed