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Автор: search.filters.author.Nurbol Orynbasaruly AppazovЯзык: Английский

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    Тип записи:Публикация,
    PROCESSING OF RICE WASTES INTO ACTIVATED CARBON
    (2018-01-01)
    S. R. Bainazarova
    ;
    A. T. Shuragaziyeva
    ;
    Anipa Tapalova
    ;
    L. A. Zhusupova
    ;
    Nurbol Orynbasaruly Appazov
    A method for processing of rice wastes (husk, straw) into activated carbon was proposed. The thermolysis of raw material and the activation of carbonizate were carried out at 500oС and 800oС temperatures respectively. The properties of obtained activated carbon are determined by standard methods. The porous structure of obtained carbon have been studied under scanned electronic microscope. According to the results of experimental studies, activated charcoal obtained from rice husks corresponds to the WAC brand, activated charcoal obtained from rice straw corresponds to BAU-A grade. The research will allow rational use of agricultural waste in order to obtain useful secondary adsorbent products intended for adsorption and liquid media. References [1] Biswas B., Singh R., Kumar J., Singh R., Gupta P., Krishna B.B., Bhaskar T. Pyrolysis behavior of rice straw under carbon dioxide for production of bio-oil // Renewable energy. 2018. Vol. 129. P. 686-694. [2] Wu J., Collins S.R.A., Elliston A., Wellner N., Dicks J., Roberts I.N., Waldron K.W. Release of cell wall phenolic esters during hydrothermal pretreatment of rice husk and rice straw // Biotechnology for biofuels. 2018. Vol. 11. DOI: 10.1186/s13068-018-1157-1. [3] GOST 6217. Ugol' aktivnyj drevesnyj droblenyj. Tehnicheskie uslovija. M.: IPK Izd-vo standartov, 2003. [4] GOST R 56357-2015. Ugol' aktivirovannyj AG-3. Tehnicheskie uslovija. M.: Standartinform. 2016. [5] Kinle H., Bader Je. Aktivnye ugli i ih promyshlennoe primenenie. L.: Himija, 1984. 216 p. [6] Himicheskij jenciklopedicheskij slovar'. M.: Sovetskaja jenciklopedija, 1983. 19 p. [7] Arezou Niksiar, Bahram Nasernejad. Activated carbon preparation from pistachio shell pyrolysis and gasification in a spouted bed reactor // Biomass and Bioenergy. 2017. Vol. 106. P. 43-50. [8] Yeru Liang, Chen Yang, Hanwu Dong, Wenqi Li, Hang Hu, Yong Xiao, Mingtao Zheng, Yingliang Liu. Facile Synthesis of Highly Porous Carbon from Rice Husk // ACS Sustainable Chem. Eng., Just Accepted Manuscript. DOI: 10.1021/acssuschemeng.7b01315. Publ. (Web): 24.06.2017. [9] Wenli Zhang, Nan Lin, Debo Liu, Jinhui Xu, Jinxin Sha, Jian Yin, Xiaobo Tan, Huiping Yang, Haiyan Lu, Haibo Lin. Direct carbonization of rice husk to prepare porous carbon for supercapacitor applications // Energy. 2017. Vol. 128. P. 618-625. [10] Pred.patent RK №15933. Sposob poluchenija karbonizirovannogo sorbenta dlja izvlechenija zolota iz rastvorov // Data opubl. 15.07.2005, bjul. №7. Mansurov Z.A., Mansurova R.M., Nikolaeva A.F., Vasil'ev D.G. [11] Hoang Kim Bong, Timofeev V.S., Tjomkin O.N., Gafarov I.G., Timoshenko A.V., Artamonova T.V., Gorbacheva O.V., Kol'vah I.P., Mishulin G.M., Shhepakin M.B., Kozhura E.A., Haziev R.M., Vatolin A.K. Sposob poluchenija aktivirovannogo uglja iz othodov sel'skogo hozjajstva // Patent RF №2315712. Data opubl. 27.01.2008. [12] Muhin V.M., Voropaeva N.L., Karpachev V.V., Harlamov S.A., Spiridonov Ju.Ja., Gur'janov V.V., Dmitrjakova E.E. Sposob poluchenija aktivnogo uglja iz rastitel'nyh othodov // Patent RF №2527221. Data opubl. 27.08.2014. [13] Hanum F., Bani O., Wirani L.I. Characterization of Activated Carbon from Rice Husk by HCl Activation and Its Application for Lead (Pb) Removal in Car Battery Wastewater // IOP Conf. Series: Materials Science and Engineering 180 (2017) 012151 doi:10.1088/1757899X/180/1/012151. [14] Hanum F., Bani O., Izdiharo A.M. Characterization of Sodium Carbonate (Na2CO3) Treated Rice Husk Activated Carbon and Adsorption of Lead from Car Battery Wastewater // IOP Conf. Series: Materials Science and Engineering 180 (2017) 012149 doi:10.1088/1757899X/180/1/012149. [15] Yeru Liang, Chen Yang, Hanwu Dong, Wenqi Li, Hang Hu, Yong Xiao, Mingtao Zheng, Yingliang Liu. Facile Synthesis of Highly Porous Carbon from Rice Husk // ACS Sustainable Chem. Eng., Just Accepted Manuscript. DOI: 10.1021/ acssuschemeng.7b01315. 262[16] GOST 17219. Ugli aktivnye. Metod opredelenija summarnogo obema por po vode. M.: Izdatel'stvo standartov, 1988. [17] GOST 12597. Sorbenty. Metod opredelenija massovoj doli vody v aktivnyh ugljah i katalizatorah na ih osnove. M.: Izdatel'stvo standartov, 1989. [18] GOST 16190. Sorbenty. Metod opredelenija nasypnoj plotnosti. M.: Izdatel'stvo standartov, 1970.
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    Тип записи:Публикация,
    OBTAINING BIOCHAR FROM RICE HUSK AND STRAW
    (National Academy of Sciences of the Republic of Kazakhstan, 2021-02-01)
    Nurbol Orynbasaruly Appazov
    ;
    Б.М. Базарбаев
    ;
    T. Assylbekkyzy
    ;
    Banu Diyarova
    ;
    С.А. Канжар
    This paper presents the results of research on obtaining biochar from agricultural plant waste such as rice husk and straw. The selection of the optimal conditions for thermolysis, such as the duration and temperature of the process, has been conducted. The thermolysis products are characterized for iodine adsorption activity, cumulative water pore volume, and for bulk density. The porous structure of the obtained products has been studied by scanning electron microscopy. Based on the results of the research conducted, it has been found that biochars obtained from husk and straw with a thermolysis duration of 30 minutes have low iodine sorption characteristics and water pore volumes. With an increase in the duration of thermolysis, the sorption characteristics improve, the optimal for the husk is the thermolysis duration of 60 minutes at a temperature of 500°C, and for straw, the optimal thermolysis duration is 60 minutes at a temperature of 300°C. The best option is biochar obtained from rice straw at a duration of 60 minutes and a thermolysis temperature of 300°C, having an iodine adsorption activity of 54.61%, a cumulative water pore volume of 0.941 cm3/g and a bulk density of 169.29 g/dm3. The obtained biochars from rice husk and straw have been studied by scanning electron microscopy at 4300 and 5000 times magnification, and they have a developed porous structure. According to the literature, it is known that biochar can also be used as a renewable energy source. Research has been carried out to determine the calorific value of the obtained biochars. To compare the calorific value of rice husk, straw and the obtained biochars, their heating values have been determined on a calorimeter. The highest heating value has a biochar obtained from husk at a duration of 60 minutes and at a thermolysis temperature of 400°C with a value of 17.520 kJ/g, the optimal for biochar obtained from straw is a duration of 60 minutes and a thermolysis temperature of 400°C with a value of 16.451 kJ/g. The experimental data obtained make it possible to use the obtained biochar from rice straw in the future as a biofertilizer to improve the characteristics of soils, as well as to use biochar obtained from rice husk to produce renewable fuel.
    Цитирования (OpenAlex) 19Цитирования (OpenCitations) 2
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    Тип записи:Публикация,
    Problems of continuity of the content of the chemistry course in secondary schools and universities
    (National Academy of Education named after Y. Altynsarin, 2025-03-31)
    Altynkul Toibazarova
    ;
    Nurbol Orynbasaruly Appazov
    ;
    Ж. К. Куанышева
    ;
    D.Zh. Niyazova
    The article examines the current issues of the relationship between chemistry education in secondary schools and universities. The discrepancy between the expectations of universities and the knowledge of high school graduates is introduced into the context, and key problems preventing the successful continuity of educational programs are identified. The current state of the content of the chemistry course at school and the requirements of universities for the level of training in this subject are analyzed. The authors analyze the current situation in educational programs, identifying contradictions between the requirements of universities and the level of training of high school graduates in the field of chemistry. The article examines in detail the key factors influencing the continuity of learning, such as differences in curricula, teaching methodology and evaluation criteria. The authors also offer an overview of existing methods and mechanisms for ensuring continuity and evaluate their effectiveness. The article highlights the roles of teachers, educational institutions and students in improving the coherence of educational programs, as well as provides specific recommendations for solving these problems. The article also provides an overview of the existing mechanisms for ensuring continuity and their effectiveness. Based on the study, specific recommendations are proposed to improve coordination between educational levels. The roles of teachers, educational authorities and universities in solving these problems are highlighted. In conclusion, the importance of joint efforts of all participants in the educational process to ensure high-quality training of future specialists in the field of chemistry is emphasized.
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    Cadmium Complexes—A Novel Family in the Coordination Chemistry of 1,2-bis(arylimino)acenaphthenes
    (Multidisciplinary Digital Publishing Institute, 2025-05-02)
    Е.В. Чехов
    ;
    Ivan V. Bakaev⧫
    ;
    А.К. Гукова
    ;
    Nikolay O. Shaposhnikov
    ;
    V. I. Komlyagina
    This work presents the synthesis routes for the first representatives of cadmium complexes based on 1,2-bis(arylimino)acenaphthene (Ar-bian). The reaction of CdCl2 with bis-(2,4,6-trimethylphenylimino)acenaphthene (tmp-bian) in a 1-to-1 molar ratio led to a dimeric complex [Cd2(tmp-bian)2Cl2(µ-Cl)2] (1). Further treatment of complex 1 with silver triflate as a chloride-eliminating agent, followed by the addition of one equivalent of tmp-bian, resulted in the formation of a mixture consisting of [Cd2(tmp-bian)2(H2O)4(µ-Cl)2](OTf)2 (2) and [Cd(tmp-bian)2(OTf)2] (3). To obtain complex 3 in its individual form, a reaction of Cd(OTf)2 with two equivalents of tmp-bian was carried out. The characterization of the complexes was conducted through a range of analytical methods, including X-ray diffraction analysis, elemental analysis, as well as IR and 1H NMR-spectroscopies. Redox properties of 1 and 3 were investigated by means of cyclic voltammetry. Cyclic voltammograms revealed irreversible reduction processes centered on the tmp-bian ligand, which were confirmed by quantum chemical calculations.
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    New Derivatives of Coumarin-3-carboxylic Acid Containing a Furopyridine Fragment: Synthesis and Some Properties
    (Pleiades Publishing, 2025-08-01)
    Alexey Vladimirovich Trifonov
    ;
    Nurbol Orynbasaruly Appazov
    ;
    R. Kh. Bagautdinova
    ;
    Lyudmila K. Kibardina
    ;
    Michail A. Pudovik
    Abstract As a result of this study, the first representative of coumarin-3-carboxylic acid containing a furopyridine fragment was obtained. It was demonstrated that this coumarin-3-carboxylic acid readily forms salts with various organic amines, diamines, as well as with alkali metal cations (Na, K) and ammonia. Testing of all obtained compounds against tumor cell lines M-HeLa and HuTu 80 revealed that a number of salt structures (specifically those based on 2-aminopyridine, 2,6-diaminopyridine, or sodium) exhibit cytotoxicity comparable to the reference drug, 5-fluorouracil.
    Цитирования (OpenAlex) 1Цитирования (OpenCitations) 1
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    Scientific and methodological foundations for teaching physicochemical analysis methods in continuous chemical education: a scoping review
    (Frontiers Media, 2026-09-28)
    Altynkul Toibazarova
    ;
    Karima Arynova
    ;
    Nursulu Zhussupbekova
    ;
    E. A. Nazarov
    ;
    G. T. Balykbayeva
    Background Rapid technological advancement, digitalization of analytical instrumentation, and the growing demand for interdisciplinary competence have significantly transformed the role of analytical chemistry in science and industry. These changes necessitate a systematic reconsideration of how physicochemical analysis methods are taught within continuous chemical education. Objective This scoping review aimed to map and systematize the structural components of modern analytical chemistry education, identify dominant pedagogical approaches, and conceptualize their functional interrelationships within an integrated educational framework. Design/methods The study was conducted as a scoping review in accordance with PRISMA-ScR guidelines. A comprehensive search was performed in Scopus, Web of Science, ScienceDirect, ACS Publications, SpringerLink, and RSCI (eLIBRARY.ru), covering publications from 1975 (the earliest eligible record retrieved) to 2024. Eligible studies addressed pedagogical, curricular, or methodological aspects of teaching analytical chemistry or physicochemical analysis methods. Extracted data were analyzed using qualitative thematic synthesis and conceptual mapping to identify recurring educational components and trends. Results The analysis revealed a consistent shift from method-centered instruction toward competence-oriented and system-based educational models. The most frequently reported components included integration of theoretical principles with laboratory practice, problem-based and research-oriented learning, incorporation of digital tools and chemometrics, emphasis on metrology and data interpretation, and increasing attention to sustainability and green analytical chemistry. The evidence indicates a transition from isolated presentation of analytical techniques to structured training focused on analytical thinking, decision-making, and interpretation of complex data. Conclusions Modern analytical chemistry education is evolving toward an integrated, interdisciplinary, and competence-driven model that prioritizes conceptual understanding, information processing, and real-world problem solving. The structural framework identified in this review may support curriculum development, modernization of laboratory courses, and alignment of educational programs with contemporary scientific and industrial demands.