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Percorrer por autor "Nurlibaeva, A.A."

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  • Novelty pillared clays for the removal of 4-nitrophenol by catalytic wet peroxide oxidation
    Publication . Kalmakhanova, Marzhan; Massalimova, Bakytgul Kabykenovna; Díaz de Tuesta, Jose Luis; Gomes, Helder; Nurlibaeva, A.A.
    One solution passes through the study of wastewater treatment by catalytic wet peroxide oxidation (CWPO).In this work, catalysts based on pillared clays with Zrcations have been prepared from nature clays of Kazakhstan, which were obtained from Zhambyl region of Karatau,Akzhardeposit, to be tested in catalytic oxidation of 4-nitrophenol, used as amodel pollutant. The Zr-pillared clay showed higher activity than nature clays in 4-nitrophenol oxidation.
    2018Artigo científico Acesso aberto Ver mais
  • Synthesis and characterization of a new magnetic composite MnFe2O4/clay based on a natural clay obtained from Turkestan deposit
    Publication . Baimuratova, Zhaina; Kalmakhanova, Marzhan; Massalimova, Bakytgul Kabykenovna; Nurlibaeva, A.A.; Kulazhanova, A.S.; Díaz de Tuesta, Jose Luis; Gomes, Helder
    The work is devoted to the development of a new method for the synthesis of magnetic composites based on manganese ferrite on a natural clay, coupling with their physico-chemical characterization. In the study, a natural clay of Kazakhstan obtained from the Turkestan deposit was used for the preparation of magnetic composites. The formation of materials with magnetic properties is an urgent task of our time, due to the needs of various applications of magnetically controlled materials for biomedical systems, electronic devices, catalytic and adsorption processes. The advantage of such materials is the ability to control them using a magnetic field for shaking, recovery, induction heating, among others. In this work, samples were prepared by co-precipitation of manganese and iron salts with 5 mol L-1 NaOH over the Turkestan clay (TC). Materials were characterized by various analyses, such as Fourier-Transform infrared spectroscopy (FTIR), X-ray diffractometric analysis (XRD), and elemental analysis. According to the results of physical and chemical studies of the XRD and thermal analysis, kaolinite is the main mineral in the composition of TC. Magnetic adsorbents MnFe2O4/clay with perfect magnetic separation characteristics were successfully obtained by chemical co-precipitation.
    2021Artigo científico Acesso aberto Ver mais