Oxidized nickel ores account for the majority of industrial ores suitable for nickel production. The processing of such ores using traditional pyrometallurgical technology is not economically viable due to the low nickel content. One of the most cost-effective methods of processing oxidized nickel ores is sulfuric acid leaching technology followed by sorption extraction. The aim of this work is to establish the kinetic and thermodynamic parameters of the sorption extraction of nickel and cobalt using iminodiacetate chelating ion-exchange sorbents from various manufacturers, to select a desorbing solution and to determine the degree of desorption. The sorption of nickel and cobalt was carried out in a weakly acidic medium from a model solution containing impurities of other metals in static and dynamic modes. The limiting sorption capacity for the studied sorbents is 18-26 mg/g for nickel and 1-2 mg/g for cobalt in the static mode. The sorption capacity in the dynamic mode for nickel is equal to 25.5 g/L for Purolite S 930, 29.2 g/L for Lewatit TP 207, 1.4 g/L, and 1.8 g/L for cobalt, respectively. The best desorption parameters are achieved when using a 2 M sulfuric acid solution. The degree of desorption for sorbents Purolite S 930 and Lewatit TP 207 exceeds 90%. The use of the Lewatit TP 207 sorbent for the extraction of nickel from the leaching solution of nickel ore of the Gornostaevskoye deposit in 5 cycles made it possible to obtain a commercial desorbate with a nickel content of 18 g/L. The use of a part of the commercial desorbate obtained in the previous cycle, further strengthened to the initial concentration of sulfuric acid, for re-extracting nickel from the saturated sorbent during a cyclic process leads to a deterioration in desorption characteristics. It is recommended to remove the commercial desorbate from the process after several cycles of desorption and supply new solution of sulfuric acid for desorption to restore the sorption parameters.
氧化镍矿占适合镍生产的工业矿石的大多数。由于镍含量低，使用传统火法冶金技术处理此类矿石在经济上是不可行的。处理氧化镍矿最具成本效益的方法之一是硫酸浸出技术，然后是吸附萃取。这项工作的目的是建立使用不同制造商的亚氨基二乙酸螯合离子交换吸附剂吸附萃取镍和钴的动力学和热力学参数，以选择解吸溶液并确定解吸程度。镍和钴的吸附是在弱酸性介质中从含有其他金属杂质的模型溶液中以静态和动态模式进行的。在静态模式下，所研究吸附剂对镍的极限吸附容量为18-26mg/g，对钴的极限吸附能力为1-2mg/g。在动态模式下，Purolite S 930对镍的吸附容量分别为25.5g/L、Lewatit TP 207对29.2g/L、钴对1.4g/L和1.8g/L。当使用2M硫酸溶液时，可以获得最佳的解吸参数。吸附剂Purolite S 930和Lewatit TP 207的解吸程度超过90%。使用Lewatit TP 207吸附剂在5个循环中从Gornostaevskoye矿床的镍矿浸出溶液中提取镍，使得可以获得镍含量为18g/L的商业脱附物。在循环过程中，使用在上一个循环中获得的部分商业脱附物，进一步强化到硫酸的初始浓度，用于从饱和吸附剂中重新提取镍，导致脱附特性恶化。建议在几个解吸循环后从工艺中去除商业解吸产物，并提供新的硫酸溶液进行解吸，以恢复吸附参数。
{"title":"Selection of sorption materials for the extraction of nickel and cobalt from the ore of the Gornostaevskoye deposit","authors":"Yelena Panova, Y. Aubakirov, H. Arbag","doi":"10.15328/cb1180","DOIUrl":"https://doi.org/10.15328/cb1180","url":null,"abstract":"Oxidized nickel ores account for the majority of industrial ores suitable for nickel production. The processing of such ores using traditional pyrometallurgical technology is not economically viable due to the low nickel content. One of the most cost-effective methods of processing oxidized nickel ores is sulfuric acid leaching technology followed by sorption extraction. The aim of this work is to establish the kinetic and thermodynamic parameters of the sorption extraction of nickel and cobalt using iminodiacetate chelating ion-exchange sorbents from various manufacturers, to select a desorbing solution and to determine the degree of desorption. The sorption of nickel and cobalt was carried out in a weakly acidic medium from a model solution containing impurities of other metals in static and dynamic modes. The limiting sorption capacity for the studied sorbents is 18-26 mg/g for nickel and 1-2 mg/g for cobalt in the static mode. The sorption capacity in the dynamic mode for nickel is equal to 25.5 g/L for Purolite S 930, 29.2 g/L for Lewatit TP 207, 1.4 g/L, and 1.8 g/L for cobalt, respectively. The best desorption parameters are achieved when using a 2 M sulfuric acid solution. The degree of desorption for sorbents Purolite S 930 and Lewatit TP 207 exceeds 90%. The use of the Lewatit TP 207 sorbent for the extraction of nickel from the leaching solution of nickel ore of the Gornostaevskoye deposit in 5 cycles made it possible to obtain a commercial desorbate with a nickel content of 18 g/L. The use of a part of the commercial desorbate obtained in the previous cycle, further strengthened to the initial concentration of sulfuric acid, for re-extracting nickel from the saturated sorbent during a cyclic process leads to a deterioration in desorption characteristics. It is recommended to remove the commercial desorbate from the process after several cycles of desorption and supply new solution of sulfuric acid for desorption to restore the sorption parameters.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41678641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Selenova, Aigerim Ayazbayeva, Alexsey Shakhvorostov, S. Kabdrakhmanova, S. Nauryzova, S. Kudaibergenov
Multilayer films were synthesized from a complex of branched polyethyleneimine (PEI) with copper nanoparticles (PEI-CuNPs) and sodium poly-2-acrylamide-2-methyl-1-propanesulfonate (PAMPSNa), applied layer-by-layer (LbL) on a solid support in an acidic medium. Protonation of the amino groups of PEI in an acidic medium increases the positive charge of the PEI-CuNPs system to +43.5 mV and promotes the formation of an interpolyelectrolyte complex between the positively charged PEI-CuNPs and the highly charged anionic polyelectrolyte PAMPS, the ζ-potential of which was -141 mV. AFM images and SEM micrographs showed a uniform distribution of spherical copper nanoparticles in the homogeneous structure of the multilayer film. The optical characteristics and hydrodynamic dimensions of PEI-CuNPs indicate the formation of PEI-CuNPs nanoparticles with sizes of 60-300 nm, with an average size of up to 100 nm. Copper nanoparticles distributed uniformly in a multilayer PEI-CuNPs/PAMPS film may be of interest for applications in the field of membrane catalysis, biochips, sensor membranes, and controlled drug delivery.
{"title":"Preparation and study of the physicochemical characteristics of multilayer polymer composites based on poly(ethyleneimine)-stabilized copper nanoparticles and poly(sodium 2-acrylamide-2-methyl-1-propanesulfonate)","authors":"B. Selenova, Aigerim Ayazbayeva, Alexsey Shakhvorostov, S. Kabdrakhmanova, S. Nauryzova, S. Kudaibergenov","doi":"10.15328/cb1235","DOIUrl":"https://doi.org/10.15328/cb1235","url":null,"abstract":"Multilayer films were synthesized from a complex of branched polyethyleneimine (PEI) with copper nanoparticles (PEI-CuNPs) and sodium poly-2-acrylamide-2-methyl-1-propanesulfonate (PAMPSNa), applied layer-by-layer (LbL) on a solid support in an acidic medium. Protonation of the amino groups of PEI in an acidic medium increases the positive charge of the PEI-CuNPs system to +43.5 mV and promotes the formation of an interpolyelectrolyte complex between the positively charged PEI-CuNPs and the highly charged anionic polyelectrolyte PAMPS, the ζ-potential of which was -141 mV. AFM images and SEM micrographs showed a uniform distribution of spherical copper nanoparticles in the homogeneous structure of the multilayer film. The optical characteristics and hydrodynamic dimensions of PEI-CuNPs indicate the formation of PEI-CuNPs nanoparticles with sizes of 60-300 nm, with an average size of up to 100 nm. Copper nanoparticles distributed uniformly in a multilayer PEI-CuNPs/PAMPS film may be of interest for applications in the field of membrane catalysis, biochips, sensor membranes, and controlled drug delivery.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49569851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lazat Krebayeva, Zhannur Algabas, Akerkem Еssenbayeva, Alexandr Brodskyi, S. Konuspayev
Cracking of paraffins was held to obtain long chain α-olefins using the catalysts from natural zeolite of Shankanay field modified with 1N HCl at the temperature range of 500-570°С and atmospheric pressure on a fixed layer. Liquid and gaseous reaction products were analyzed by gas chromatography; regeneration of the catalyst was carried out with a steam-air mixture until total absence of CO2 in the contact gases. To evaluate the structure and texture of the obtained catalysts, the methods of Mössbauer spectroscopy, X-Ray diffractometry analysis, and elemental analysis using scanning electron microscopy were used. As results, zeolite modification allowed doubling the activity of the catalysts and increasing the selectivity by 23.8-44.8%. The group compositions of olefins, alkanes and gaseous products were detected. Iron form under α-Fe2O3, ε-FeOOH and γ-FeOOH was present. The modified and blank form of catalysts under 1N hydrochloric acid solution washing phase content was detected; partial destruction of the crystalline carcass of clinoptilolite was observed.
{"title":"Cracking of the paraffins on catalysts from natural zeolite of Kazakhstan Shankanay field","authors":"Lazat Krebayeva, Zhannur Algabas, Akerkem Еssenbayeva, Alexandr Brodskyi, S. Konuspayev","doi":"10.15328/cb1154","DOIUrl":"https://doi.org/10.15328/cb1154","url":null,"abstract":"Cracking of paraffins was held to obtain long chain α-olefins using the catalysts from natural zeolite of Shankanay field modified with 1N HCl at the temperature range of 500-570°С and atmospheric pressure on a fixed layer. Liquid and gaseous reaction products were analyzed by gas chromatography; regeneration of the catalyst was carried out with a steam-air mixture until total absence of CO2 in the contact gases. To evaluate the structure and texture of the obtained catalysts, the methods of Mössbauer spectroscopy, X-Ray diffractometry analysis, and elemental analysis using scanning electron microscopy were used. As results, zeolite modification allowed doubling the activity of the catalysts and increasing the selectivity by 23.8-44.8%. The group compositions of olefins, alkanes and gaseous products were detected. Iron form under α-Fe2O3, ε-FeOOH and γ-FeOOH was present. The modified and blank form of catalysts under 1N hydrochloric acid solution washing phase content was detected; partial destruction of the crystalline carcass of clinoptilolite was observed.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67385690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zh. K. Nadirova, Oleksandr Ivakhnenko, M. Zhantasov, Gulmira Bimbetova, K. Nadirov
Reducing the water content of crude oil is a necessary step in preparing oil for transportation and processing. This task is complicated by the presence of stable water-in-oil emulsions. The most widely used approach to oil demulsification is exploring chemical demulsifiers. However, the high cost and impossibility of regenerating the latter require the search for new ways to destroy water-oil emulsions. One of the promising areas is the use of ultrasound. This paper presents the results of studies on the ultrasonic treatment of four samples of emulsions with different water content (8.74; 15; 25 and 30 vol.%) based on oil from the Kumkol oilfield (Kazakhstan). Samples of emulsions were subjected to ultrasonic action at a frequency of 40 kHz for 5-60 min at a temperature of 70±1°C, followed by settling for 40 min at the indicated temperature. The influence of the initial water content in the emulsion, the acoustic intensity, as well as the duration of ultrasonic treatment on the dewatering ratio was investigated. It was found that the residual water content in the oil was 5.04- 7.82 vol.%. Ultrasonic treatment of crude oil from the Kumkol oilfield can be used for preliminary dewatering, to subsequently reduce the consumption of chemical demulsifiers.
{"title":"Ultrasound-assisted dewatering of crude oil from Kumkol oilfield","authors":"Zh. K. Nadirova, Oleksandr Ivakhnenko, M. Zhantasov, Gulmira Bimbetova, K. Nadirov","doi":"10.15328/cb1217","DOIUrl":"https://doi.org/10.15328/cb1217","url":null,"abstract":"Reducing the water content of crude oil is a necessary step in preparing oil for transportation and processing. This task is complicated by the presence of stable water-in-oil emulsions. The most widely used approach to oil demulsification is exploring chemical demulsifiers. However, the high cost and impossibility of regenerating the latter require the search for new ways to destroy water-oil emulsions. One of the promising areas is the use of ultrasound. This paper presents the results of studies on the ultrasonic treatment of four samples of emulsions with different water content (8.74; 15; 25 and 30 vol.%) based on oil from the Kumkol oilfield (Kazakhstan). Samples of emulsions were subjected to ultrasonic action at a frequency of 40 kHz for 5-60 min at a temperature of 70±1°C, followed by settling for 40 min at the indicated temperature. The influence of the initial water content in the emulsion, the acoustic intensity, as well as the duration of ultrasonic treatment on the dewatering ratio was investigated. It was found that the residual water content in the oil was 5.04- 7.82 vol.%. Ultrasonic treatment of crude oil from the Kumkol oilfield can be used for preliminary dewatering, to subsequently reduce the consumption of chemical demulsifiers.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45218369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Akhmetova, Y. Aubakirov, Z. Tashmukhambetova, L. Sassykova, H. Arbag, A. Kurmangaliyeva
Plastic waste production and consumption is increasing at an alarming rate with the increase of the human population, rapid economic growth, continuous urbanization, and changes in lifestyle. In addition, the short life span of plastic accelerates the production of plastic waste on a daily basis. Plastic waste recycling is carried out in different ways, but in most developing countries, open or landfill disposal is a common practice for plastic waste management. Plastic recycling into feedstocks, also known as chemical recycling, is encouraged all over the world. One such area is the thermal and catalytic thermal degradation of plastics into hydrocarbon fractions, which can be used as high-quality motor fuel after appropriate processing. Hydrocracking in the presence of a catalyst is a promising method of converting waste plastic materials to high quality liquid transportation fuels with decreased amounts of olefins and heteroatoms such as S, N, Cl, N, and O. The article deals with the study of hydrocracking of waste plastic into high quality liquid fuel on various catalysts based on natural zeolite deposits Taizhuzgen. The aim of the work is to determine the effect of new composite catalysts on the yield of liquid products by studying the specific surface and porous structure based on natural zeolite modified with Mо salt. It is established that the modification of natural zeolite with Mo affects the morphology of the catalyst, therefore, the obtained catalysts have different effects on the yield and composition of liquid fractions during the hydrogenation thermocatalytic transformation of hydrocarbons. The highest yield of liquid products (61.56%) was achieved using the 2% Mo/Taizhuzgen zeolite catalyst, which was chosen as optimal.
{"title":"Recycling of waste plastics to liquid fuel mixture over composite zeolites catalysts","authors":"F. Akhmetova, Y. Aubakirov, Z. Tashmukhambetova, L. Sassykova, H. Arbag, A. Kurmangaliyeva","doi":"10.15328/cb1117","DOIUrl":"https://doi.org/10.15328/cb1117","url":null,"abstract":"Plastic waste production and consumption is increasing at an alarming rate with the increase of the human population, rapid economic growth, continuous urbanization, and changes in lifestyle. In addition, the short life span of plastic accelerates the production of plastic waste on a daily basis. Plastic waste recycling is carried out in different ways, but in most developing countries, open or landfill disposal is a common practice for plastic waste management. Plastic recycling into feedstocks, also known as chemical recycling, is encouraged all over the world. One such area is the thermal and catalytic thermal degradation of plastics into hydrocarbon fractions, which can be used as high-quality motor fuel after appropriate processing. Hydrocracking in the presence of a catalyst is a promising method of converting waste plastic materials to high quality liquid transportation fuels with decreased amounts of olefins and heteroatoms such as S, N, Cl, N, and O.\u0000The article deals with the study of hydrocracking of waste plastic into high quality liquid fuel on various catalysts based on natural zeolite deposits Taizhuzgen. The aim of the work is to determine the effect of new composite catalysts on the yield of liquid products by studying the specific surface and porous structure based on natural zeolite modified with Mо salt. It is established that the modification of natural zeolite with Mo affects the morphology of the catalyst, therefore, the obtained catalysts have different effects on the yield and composition of liquid fractions during the hydrogenation thermocatalytic transformation of hydrocarbons. The highest yield of liquid products (61.56%) was achieved using the 2% Mo/Taizhuzgen zeolite catalyst, which was chosen as optimal.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46846106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this review article were considered the works of electrochemical sensors modified with molybdenum oxide. The work of sensors based on molybdenum oxide was systematized, a comparison table was developed, the sensors were classified according to the purpose of use. Methods of molybdenum oxide synthesis used to modify the working electrode in electrochemical sensors were considered. The various methods have been used to synthesize molybdenum oxide, such as a thermal, hydrothermal, electrochemical, electric spark, pulsed laser method, acid condensation, electrophoretic precipitation, pulse potential precipitation. The main parameters of the molybdenum oxide modified sensors, such as the detection limit, linear range, response time, sensitivity, and other parameters were compared. As a result of studies, it was found that molybdenum oxide is selected as a modifying material in electrochemical sensors due to the unique physicochemical properties of molybdenum oxide, in particular because of mechanical strength, electrical conductivity, electro catalytic activity, crystallinity. The features of electrochemical biosensors coated with molybdenum oxide were described for the detection of important compounds in specific samples. Sensors based on molybdenum oxide have been used for detection of glucose, dopamine, ethanol, ascorbic acid, troponin-1, norepinephrine, procalcitonin, L-lactate, bromate, chlorate, E110, tartrazine, hydrochlorothiazide, human epidermal growth factor-2, lithium,sodium,potassium. This paper provides general summarized information about current aspects of research works related to electrochemical sensors based on molybdenum oxide.
{"title":"Molybdenum oxide based sensors","authors":"N.Zh. Zhumasheva, Leyla Kudreeva, Diana Kosybayeva","doi":"10.15328/cb1164","DOIUrl":"https://doi.org/10.15328/cb1164","url":null,"abstract":"In this review article were considered the works of electrochemical sensors modified with molybdenum oxide. The work of sensors based on molybdenum oxide was systematized, a comparison table was developed, the sensors were classified according to the purpose of use. Methods of molybdenum oxide synthesis used to modify the working electrode in electrochemical sensors were considered. The various methods have been used to synthesize molybdenum oxide, such as a thermal, hydrothermal, electrochemical, electric spark, pulsed laser method, acid condensation, electrophoretic precipitation, pulse potential precipitation. The main parameters of the molybdenum oxide modified sensors, such as the detection limit, linear range, response time, sensitivity, and other parameters were compared. As a result of studies, it was found that molybdenum oxide is selected as a modifying material in electrochemical sensors due to the unique physicochemical properties of molybdenum oxide, in particular because of mechanical strength, electrical conductivity, electro catalytic activity, crystallinity. The features of electrochemical biosensors coated with molybdenum oxide were described for the detection of important compounds in specific samples. Sensors based on molybdenum oxide have been used for detection of glucose, dopamine, ethanol, ascorbic acid, troponin-1, norepinephrine, procalcitonin, L-lactate, bromate, chlorate, E110, tartrazine, hydrochlorothiazide, human epidermal growth factor-2, lithium,sodium,potassium. This paper provides general summarized information about current aspects of research works related to electrochemical sensors based on molybdenum oxide.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67385742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Редингская школа фармации, Унивеситет Рединга, Рединг, Великобритания E-mail: v.khutoryanskiy@reading.ac.uk Данная статья посвящена 70-летнему юбилею выдающегося казахстанского химика – профессора Кудайбергенова Саркыта Елекеновича. Профессор Кудайбергенов С.Е. внес существенный вклад в исследования синтетических и природных полиэлектролитов, их комплексов с различными веществами, полимерных гидрогелей, стимул-чувствительных материалов, наночастиц и нанокомпозитов, а также в работы по использованию различных полимерных материалов и коллоидных систем в качестве катализаторов, реагентов специального назначения и систем доставки лекарств. В статье приведены основные сведения биографического характера, показывающие становление Кудайбергенова С.Е. как ученого, а также рассматриваются его основные научные достижения в области физической химии гидрофильных полимеров и коллоидных систем. Осуществлен обзор наиболее известных работ профессора Кудайбергенова С.Е., опубликованных в журналах, индексируемых Web of Knowledge. Кроме того, приведены сведения о работе профессора Кудайбергенова С.Е. над проектами, финансируемыми различными организациями, членстве в редакционных коллегиях журналов, организации Института Полимерных Материалов и Технологий, участии в работе в диссертационных советах, а также подготовке многочисленных учеников.
{"title":"Exploring new avenues in physical chemistry of hydrophilic polymers: to the 70th anniversary of Professor Sarkyt Elekenovich Kudaibergenov","authors":"V. Khutoryanskiy","doi":"10.15328/CB1179","DOIUrl":"https://doi.org/10.15328/CB1179","url":null,"abstract":"Редингская школа фармации, Унивеситет Рединга, Рединг, Великобритания E-mail: v.khutoryanskiy@reading.ac.uk Данная статья посвящена 70-летнему юбилею выдающегося казахстанского химика – профессора Кудайбергенова Саркыта Елекеновича. Профессор Кудайбергенов С.Е. внес существенный вклад в исследования синтетических и природных полиэлектролитов, их комплексов с различными веществами, полимерных гидрогелей, стимул-чувствительных материалов, наночастиц и нанокомпозитов, а также в работы по использованию различных полимерных материалов и коллоидных систем в качестве катализаторов, реагентов специального назначения и систем доставки лекарств. В статье приведены основные сведения биографического характера, показывающие становление Кудайбергенова С.Е. как ученого, а также рассматриваются его основные научные достижения в области физической химии гидрофильных полимеров и коллоидных систем. Осуществлен обзор наиболее известных работ профессора Кудайбергенова С.Е., опубликованных в журналах, индексируемых Web of Knowledge. Кроме того, приведены сведения о работе профессора Кудайбергенова С.Е. над проектами, финансируемыми различными организациями, членстве в редакционных коллегиях журналов, организации Института Полимерных Материалов и Технологий, участии в работе в диссертационных советах, а также подготовке многочисленных учеников.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45812348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Institute of Polymer Materials and Technology, Almaty, Kazakhstan *Е-mail: alex.hv91@gmail.com Molecularly-imprinted polyampholyte (MIP) hydrogels based on nonionic monomer – acrylamide (AAm), anionic monomer – sodium salt of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and cationic monomer – (3-acrylamidopropyl)trimethyl ammonium chloride (APTAC) were obtained by immobilization of bovine serum albumin (BSA) and lysozyme in situ polymerization conditions. It was found that the best amphoteric hydrogel for sorption of BSA is APTAC-75H while for sorption of lysozyme is AMPS-75H. The sorption capacity of APTAC-75H and AMPS-75H with respect to BSA and lysozyme is 305.7 and 64.1-74.8 mg per 1 g of hydrogel respectively. Desorption of BSA and lysozyme from MIP template performed by aqueous solution of 1M NaCl is equal to 82-88%. Separation of BSA and lysozyme from their mixture was performed on MIP templates. The results of adsorption-desorption cycles of BSA on adjusted to BSA polyampholyte hydrogel APTAC-75H and of lysozyme on adjusted to lysozyme polyampholyte hydrogel AMPS-75H show that the mixture of BSA and lysozyme can be selectively separated with the help of MIP hydrogels.
{"title":"Molecular imprinting of bovine serum albumin and lysozyme within the matrix of polyampholyte hydrogels based on acrylamide, sodium salt of 2-acrylamido-2-methyl-1-propanesulfonic acid and (3-acrylamidopropyl)trimethyl ammonium chloride","authors":"A. Shakhvorostov, S. Kudaibergenov","doi":"10.15328/CB1182","DOIUrl":"https://doi.org/10.15328/CB1182","url":null,"abstract":"Institute of Polymer Materials and Technology, Almaty, Kazakhstan *Е-mail: alex.hv91@gmail.com Molecularly-imprinted polyampholyte (MIP) hydrogels based on nonionic monomer – acrylamide (AAm), anionic monomer – sodium salt of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and cationic monomer – (3-acrylamidopropyl)trimethyl ammonium chloride (APTAC) were obtained by immobilization of bovine serum albumin (BSA) and lysozyme in situ polymerization conditions. It was found that the best amphoteric hydrogel for sorption of BSA is APTAC-75H while for sorption of lysozyme is AMPS-75H. The sorption capacity of APTAC-75H and AMPS-75H with respect to BSA and lysozyme is 305.7 and 64.1-74.8 mg per 1 g of hydrogel respectively. Desorption of BSA and lysozyme from MIP template performed by aqueous solution of 1M NaCl is equal to 82-88%. Separation of BSA and lysozyme from their mixture was performed on MIP templates. The results of adsorption-desorption cycles of BSA on adjusted to BSA polyampholyte hydrogel APTAC-75H and of lysozyme on adjusted to lysozyme polyampholyte hydrogel AMPS-75H show that the mixture of BSA and lysozyme can be selectively separated with the help of MIP hydrogels.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45265436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Nurgaziyeva, S. Kudaibergenov, G. Mun, V. Khutoryanskiy
1Al-Farabi Kazakh National University, Almaty, Kazakhstan 2Institute of Polymer Materials and Technologies, Almaty, Kazakhstan 3Reading School of Pharmacy, University of Reading, Reading, United Kingdom *E-mail: v.khutoryanskiy@reading.ac.uk Gold nanoparticles (GNPs) protected by poly(2-ethyl-2-oxazoline) (POZ) of different molecular weights (Mw = 5, 50, 200 and 500 kDa) were synthesised and characterised by dynamic light scattering, nanoparticle tracking analysis, zeta potential measurement and transmission electron microscopy. It was established that the use of POZ with 50 kDa resulted in formation of GNPs with low polydispersity while POZ with greater molecular weights led to formation of more polydisperse GNPs. Fluorescent labelling of these nanoparticles was achieved through their reaction with polyethyleneglycol dithiol (8-12 kDa) as a linker molecule with subsequent reaction with 6-(iodoacetamido) fluorescein. The fluorescent nature of obtained GNPs was confirmed by the appearance of the fluorescence peak at 510 nm that is typical for fluorescein molecules and glowing of the aqueous solution under the UV irradiaton. The fluorescently-labelled GNPs are promising tool in biomedical application to monitor the biological systems using fluorescent microscopy.
{"title":"Synthesis of fluorescently-labelled poly(2-ethyl-2-oxazoline)-protected gold nanoparticles","authors":"E. Nurgaziyeva, S. Kudaibergenov, G. Mun, V. Khutoryanskiy","doi":"10.15328/CB1185","DOIUrl":"https://doi.org/10.15328/CB1185","url":null,"abstract":"1Al-Farabi Kazakh National University, Almaty, Kazakhstan 2Institute of Polymer Materials and Technologies, Almaty, Kazakhstan 3Reading School of Pharmacy, University of Reading, Reading, United Kingdom *E-mail: v.khutoryanskiy@reading.ac.uk Gold nanoparticles (GNPs) protected by poly(2-ethyl-2-oxazoline) (POZ) of different molecular weights (Mw = 5, 50, 200 and 500 kDa) were synthesised and characterised by dynamic light scattering, nanoparticle tracking analysis, zeta potential measurement and transmission electron microscopy. It was established that the use of POZ with 50 kDa resulted in formation of GNPs with low polydispersity while POZ with greater molecular weights led to formation of more polydisperse GNPs. Fluorescent labelling of these nanoparticles was achieved through their reaction with polyethyleneglycol dithiol (8-12 kDa) as a linker molecule with subsequent reaction with 6-(iodoacetamido) fluorescein. The fluorescent nature of obtained GNPs was confirmed by the appearance of the fluorescence peak at 510 nm that is typical for fluorescein molecules and glowing of the aqueous solution under the UV irradiaton. The fluorescently-labelled GNPs are promising tool in biomedical application to monitor the biological systems using fluorescent microscopy.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48992967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Gussenov, N. Mukhametgazy, A. Shakhvorostov, S. Kudaibergenov
A novel ternary polyampholyte composed of fully charged anionic monomer – 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS), cationic monomer – (3-acrylamidopropyl) trimethylammonium chloride (APTAC) and the positively charged fluorescent dye – acrylamide Nile Blue (ANB) was synthesized by conventional free radical copolymerization and characterized by FTIR, UV-Vis, fluorescence spectroscopy, dynamic light scattering and zeta-potential. FTIR spectrum of AMPS-APTAC-ANB shows that introduction of 1 mol.% ANB into copolymer composition does not influence the basic characteristic bands of polyampholyte. The adsorption and emission peaks of AMPS-APTAC-ANB found at max = 586 nm and max = 660-680 nm are attributed to ANB groups of terpolymer. The average hydrodynamic size and zeta potential of AMPS-APTAC-ANB in aqueous solution that are equal to 4.3 nm and = 1.6 mV indicating the globular conformation of amphoteric macromolecules with a slightly negative charge. Injection of 0.1 wt.% (or 1.310-3 molL-1) AMPS-APTAC-ANB into the core sample derived from the “Vostochnyi Moldabek” oilfield demonstrated the passing of fluorescently-labeled terpolymer through the core. The ternary polyampholyte containing the fluorescent marker can serve as oilfield tracer for monitoring well-to-well connections (or interwell tracer test).
{"title":"Synthesis and characterization of novel acrylamide-based ternary polyampholyte as tracer agent","authors":"I. Gussenov, N. Mukhametgazy, A. Shakhvorostov, S. Kudaibergenov","doi":"10.15328/CB1183","DOIUrl":"https://doi.org/10.15328/CB1183","url":null,"abstract":"A novel ternary polyampholyte composed of fully charged anionic monomer – 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS), cationic monomer – (3-acrylamidopropyl) trimethylammonium chloride (APTAC) and the positively charged fluorescent dye – acrylamide Nile Blue (ANB) was synthesized by conventional free radical copolymerization and characterized by FTIR, UV-Vis, fluorescence spectroscopy, dynamic light scattering and zeta-potential. FTIR spectrum of AMPS-APTAC-ANB shows that introduction of 1 mol.% ANB into copolymer composition does not influence the basic characteristic bands of polyampholyte. The adsorption and emission peaks of AMPS-APTAC-ANB found at max = 586 nm and max = 660-680 nm are attributed to ANB groups of terpolymer. The average hydrodynamic size and zeta potential of AMPS-APTAC-ANB in aqueous solution that are equal to 4.3 nm and = 1.6 mV indicating the globular conformation of amphoteric macromolecules with a slightly negative charge. Injection of 0.1 wt.% (or 1.310-3 molL-1) AMPS-APTAC-ANB into the core sample derived from the “Vostochnyi Moldabek” oilfield demonstrated the passing of fluorescently-labeled terpolymer through the core. The ternary polyampholyte containing the fluorescent marker can serve as oilfield tracer for monitoring well-to-well connections (or interwell tracer test).","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48236802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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