Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет

Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/1

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Автор: search.filters.author.Jakpar JandosovТема: search.filters.subject.microporosity

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    Адсорбция препарата «Вольтарен» на пористых углеродных материалах в статических и динамических условиях
    (2026-04-06)
    Jakpar Jandosov
    ;
    Alzhan Baimenov
    ;
    А.Н. Сабитов
    ;
    Е.О. Досжанов
    ;
    D. Chenchik
    The article investigates the adsorption of diclofenac (pure API and as part of the Voltaren preparation) on porous carbon materials obtained from rice husks by chemical activation methods (H3PO4, K2CO3, KOH), as well as on synthetic carbon from xerogel. A comparative assessment of the sorption capacity and the kinetics of the process was carried out under static and dynamic conditions. It was found that the KOH-activated sample (SBET = 2610 m2/g) has the highest microporosity and demonstrates the maximum adsorption capacity (up to 956 mg/g in static and up to 1016 mg/g in a column with a fixed layer). Kinetic data is well described by a pseudo second-order model (R2 > 0.99), and dynamic adsorption is described by the Thomas model (R2 = 0.998). This allows us to predict the efficiency of sorbents in flow systems. There was no significant effect of the auxiliary components of the dosage form on the sorption process. The established patterns indicate the predominant interaction of the diclofenac molecule with the microporous carbon matrix through π–π interactions and electrostatic effects. The results obtained confirm the prospects of alkaline-activated carbon materials based on biomass for the development of effective enterosorbents for intoxication with nonsteroidal anti-inflammatory drugs.
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    Биошикізат негізіндегі кеуекті көміртекті сорбциялық материалдар алу және физика-химиялық қасиеттерін зерттеу
    (2026-04-06)
    А.Р. Керимкулова
    ;
    Е.Ж. Ермолданов
    ;
    Н.М. Асанбек
    ;
    М.К. Атаманов
    ;
    А.Н. Жумагалиева
    For the first time, an approach to the production of highly efficient porous carbon sorption materials based on lignocellulose agricultural waste has been developed and a comprehensive assessment of their physico-chemical properties has been carried out. Rice husks (RH), walnut shells (WSh), wheat straw (WSt) and pine sawdust (PS) were used as raw materials. The resulting carbonysates were chemically activated with potassium hydroxide at different mass ratios of the activating agent and the carbon matrix. To increase the surface chemical activity of sorbents, potassium hydroxide was used. The morphology of the surface and the elemental composition of the synthesized materials were studied using scanning electron microscopy and energy dispersion analysis, and the functional groups were studied using Fourier transform infrared spectroscopy (FTIR). It has been established that an increase in the degree of activation leads to the development of a hierarchical porous structure with the formation of micro-, meso- and macropores, as well as to an increase in the content of oxygen- and nitrogen-containing functional groups on the surface of carbon materials. The greatest microporosity was achieved with a KOH:carbon mass ratio of 1:4. The formed functional structure helps to increase the sorption capacity of materials in relation to toxic pollutants of various nature. The results obtained confirm the prospects of using synthesized carbon sorbents as environmentally safe and economically feasible materials for cleaning air and water environments.