V. Starchevskyy, Y. Hrynchuk, P. Matcipura, V. Reutskyy
The article is presenting a modification of bituminous binder with ecological epoxidized rapeseed oil (BERO) in the presence of the initiator (hardener). Adipic acid (AA), maleic anhydride (MA) and polyethylene polyamine (PEPA) were used as the initiators. The effect of modification temperature and, as well as initiator nature, on the bitumen properties was determined. Bitumen modified with BERO was evaluated by the following indicators: softening temperature, penetration, ductility, and adhesion to the glass. The optimal initiator : rapeseed oil epoxide (ERO) : bitumen ratio was found to be 0.15:3:100; it allows obtaining bitumen with improved properties, in particular, adhesive properties increase by 2–3 times depending on the nature and content of the initiator. To improve the formula composite and evaluation of asphalt mixtures the additional researches will be conducted.
{"title":"Influence of Initiators on the Adhesion Properties of Bitumen Modified by Natural Origin Epoxide","authors":"V. Starchevskyy, Y. Hrynchuk, P. Matcipura, V. Reutskyy","doi":"10.23939/CHCHT15.01.142","DOIUrl":"https://doi.org/10.23939/CHCHT15.01.142","url":null,"abstract":"The article is presenting a modification of bituminous binder with ecological epoxidized rapeseed oil (BERO) in the presence of the initiator (hardener). Adipic acid (AA), maleic anhydride (MA) and polyethylene polyamine (PEPA) were used as the initiators. The effect of modification temperature and, as well as initiator nature, on the bitumen properties was determined. Bitumen modified with BERO was evaluated by the following indicators: softening temperature, penetration, ductility, and adhesion to the glass. The optimal initiator : rapeseed oil epoxide (ERO) : bitumen ratio was found to be 0.15:3:100; it allows obtaining bitumen with improved properties, in particular, adhesive properties increase by 2–3 times depending on the nature and content of the initiator. To improve the formula composite and evaluation of asphalt mixtures the additional researches will be conducted.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87225891","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 paper activated carbon is prepared from coconut leaves by chemical activation during slow pyrolysis at 673 K in an inert atmosphere. Activated carbon is prepared in the stiochiometric ratio of 1:1 (CL1), 2:1 (CL2) and 3:1 (CL3). Optimized 3:1 ratio is preferable for further study. BET surface area of CL3 activated carbon was found 1060.57 m/g. It is greater than those of CL1 and CL2. The batch sorption study experiments were conducted with respect to solute concentration of 2.5– 122.8 mg/l and solution temperature of 313–343 K. The Langmuir, Freundlich and Temkin isotherm studies were conducted. The experimental data fitted very well for the pseudo-first order and pseudo-second-order. The results have established good potentiality for the CL3 activated carbon to be used as a sorbent for the removal of lead from wastewater.
{"title":"Adsorption of Heavy Metal on Active Carbon Derived from Coconut Leaves Agro-Waste","authors":"A. Jadhav, G. Mohanraj, S. Mayadevi, A. Gokarn","doi":"10.23939/chcht14.04.553","DOIUrl":"https://doi.org/10.23939/chcht14.04.553","url":null,"abstract":"In this paper activated carbon is prepared from coconut leaves by chemical activation during slow pyrolysis at 673 K in an inert atmosphere. Activated carbon is prepared in the stiochiometric ratio of 1:1 (CL1), 2:1 (CL2) and 3:1 (CL3). Optimized 3:1 ratio is preferable for further study. BET surface area of CL3 activated carbon was found 1060.57 m/g. It is greater than those of CL1 and CL2. The batch sorption study experiments were conducted with respect to solute concentration of 2.5– 122.8 mg/l and solution temperature of 313–343 K. The Langmuir, Freundlich and Temkin isotherm studies were conducted. The experimental data fitted very well for the pseudo-first order and pseudo-second-order. The results have established good potentiality for the CL3 activated carbon to be used as a sorbent for the removal of lead from wastewater.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77158975","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}
Yevgen M. Panov, N. Gomelia, O. Ivanenko, A. Vahin, S. Leleka
In this paper, the influence of carbon material type, temperature and oxygen concentration in gas mixture on the processes of carbon monoxide formation in production of the electrodes by graphitization was explored experimentally. Specific quantity of gas formed for a definite time, reduced to mass unit of carbon loading using pitch, packing materials and charge mixture of industrial use, was calculated. It is demonstrated that pitch provides the highest rate of carbon oxidation with the release of CO and substantially exceeds packing materials and charge mixture for this index.
{"title":"Determination of the Conditions for Carbon Materials Oxidation with Carbon Monoxide Formation at High Temperatures","authors":"Yevgen M. Panov, N. Gomelia, O. Ivanenko, A. Vahin, S. Leleka","doi":"10.23939/chcht14.04.545","DOIUrl":"https://doi.org/10.23939/chcht14.04.545","url":null,"abstract":"In this paper, the influence of carbon material type, temperature and oxygen concentration in gas mixture on the processes of carbon monoxide formation in production of the electrodes by graphitization was explored experimentally. Specific quantity of gas formed for a definite time, reduced to mass unit of carbon loading using pitch, packing materials and charge mixture of industrial use, was calculated. It is demonstrated that pitch provides the highest rate of carbon oxidation with the release of CO and substantially exceeds packing materials and charge mixture for this index.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77805542","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}
S. Nesterivska, V. Makogon, М. Yatsyshyn, I. Saldan, O. Reshetnyak, N. German, Y. Stadnyk
The glauconite-polyaniline composites were prepared through oxidation of aniline using ammonium peroxodisulfate in aqueous solutions of phosphoric acid on the surface of a glauconite powder. Intermolecular interaction between amorphous polyaniline macromolecules and interphase coupling of polyaniline to the glauconite surface was confirmed by X-ray diffraction and FT-IR spectroscopy. Higher concentration of phosphoric acid led to a stronger intermolecular and interphase connection because of H-bonding, and that resulted in higher electric conductivity while a magnetic susceptibility of the composites was not affected. Thermal analysis for the prepared composites confirmed the interfacial interaction between the polyaniline macromolecules and the surface of powdered glauconite.
{"title":"Properties of the Composites Made of Glauconite and Polyaniline in Aqueous Solutions of Phosphoric Acid","authors":"S. Nesterivska, V. Makogon, М. Yatsyshyn, I. Saldan, O. Reshetnyak, N. German, Y. Stadnyk","doi":"10.23939/chcht14.04.487","DOIUrl":"https://doi.org/10.23939/chcht14.04.487","url":null,"abstract":"The glauconite-polyaniline composites were prepared through oxidation of aniline using ammonium peroxodisulfate in aqueous solutions of phosphoric acid on the surface of a glauconite powder. Intermolecular interaction between amorphous polyaniline macromolecules and interphase coupling of polyaniline to the glauconite surface was confirmed by X-ray diffraction and FT-IR spectroscopy. Higher concentration of phosphoric acid led to a stronger intermolecular and interphase connection because of H-bonding, and that resulted in higher electric conductivity while a magnetic susceptibility of the composites was not affected. Thermal analysis for the prepared composites confirmed the interfacial interaction between the polyaniline macromolecules and the surface of powdered glauconite.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86224785","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}
O. Suberlyak, O. Grytsenko, N. Baran, G. Yatsulchak, B. Berezhnyy
The method for obtaining composite hydrogel tubular products with the increased strength on the basis of copolymers of 2-hydroxyethylmethacrylate with polyvinylpyrrolidone has been developed. The method consists in the formation of hydrogel tubes with a subsequent precipitation from the solution into their outer surfa with polyvinylpyrrolidone. The obtained composite hydrogel tubes are characterized by the sufficient strength, resilience, elasticity, as well as the ability to withstand an internal pressure within 24–43 kPa (180–320 mm Hg).
研究了以2-羟乙基甲基丙烯酸酯与聚乙烯吡咯烷酮共聚物为原料制备强度更高的复合水凝胶管状产品的方法。该方法包括形成水凝胶管，随后用聚乙烯吡咯烷酮从溶液中沉淀到其外表面。所获得的复合水凝胶管具有足够的强度、回弹性、弹性，能够承受24-43 kPa (180-320 mm Hg)的内压。
{"title":"Formation Features of Tubular Products on the Basis of Composite Hydrogels","authors":"O. Suberlyak, O. Grytsenko, N. Baran, G. Yatsulchak, B. Berezhnyy","doi":"10.23939/CHCHT14.03.312","DOIUrl":"https://doi.org/10.23939/CHCHT14.03.312","url":null,"abstract":"The method for obtaining composite hydrogel tubular products with the increased strength on the basis of copolymers of 2-hydroxyethylmethacrylate with polyvinylpyrrolidone has been developed. The method consists in the formation of hydrogel tubes with a subsequent precipitation from the solution into their outer surfa with polyvinylpyrrolidone. The obtained composite hydrogel tubes are characterized by the sufficient strength, resilience, elasticity, as well as the ability to withstand an internal pressure within 24–43 kPa (180–320 mm Hg).","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73904060","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}
The combustion characteristics of Chikila coal (CHK) from Nigeria have been examined. It was established that CHK has a high carbon and fixed carbon content, but low nitrogen, sulphur, and ash content. Based on coal heating value, it was classified as a high volatile B bituminous coal. The temperature profile characteristics were examined through thermogravimetric analysis. The combustion kinetics of CHK was examined based on the Kissinger model. It is shown that CHK is a potentially good feedstock for future energy recovery and industrial utilization.
{"title":"Determination of the Combustion Characteristics of Chikila Coal Through the Kissinger Kinetics Model","authors":"Bemgba Bevan Nyakuma","doi":"10.23939/CHCHT14.03.433","DOIUrl":"https://doi.org/10.23939/CHCHT14.03.433","url":null,"abstract":"The combustion characteristics of Chikila coal (CHK) from Nigeria have been examined. It was established that CHK has a high carbon and fixed carbon content, but low nitrogen, sulphur, and ash content. Based on coal heating value, it was classified as a high volatile B bituminous coal. The temperature profile characteristics were examined through thermogravimetric analysis. The combustion kinetics of CHK was examined based on the Kissinger model. It is shown that CHK is a potentially good feedstock for future energy recovery and industrial utilization.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77495141","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}
P. Topilnytskyy, V. Romanchuk, T. Yarmola, Halyna Stebelska
1 The rheological properties of oils from 3 wells of Yablunivske field (Poltava region, Ukraine) were investigated using a rotational viscometer. According to the dynamic viscosity and shear stress dependence on the shear velocity, the nature of the oil flow has been determined, which is of practical importance for evaluating the effectiveness of different modes of action on the rheological behavior of oils during their extraction and transportation.
{"title":"Study on Rheological Properties of Extra-Heavy Crude Oil from Fields of Ukraine","authors":"P. Topilnytskyy, V. Romanchuk, T. Yarmola, Halyna Stebelska","doi":"10.23939/CHCHT14.03.412","DOIUrl":"https://doi.org/10.23939/CHCHT14.03.412","url":null,"abstract":"1 The rheological properties of oils from 3 wells of Yablunivske field (Poltava region, Ukraine) were investigated using a rotational viscometer. According to the dynamic viscosity and shear stress dependence on the shear velocity, the nature of the oil flow has been determined, which is of practical importance for evaluating the effectiveness of different modes of action on the rheological behavior of oils during their extraction and transportation.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75307471","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}
A. Nagurskyy, Y. Khlibyshyn, O. Grynyshyn, V. Kochubei
1 The main regularities of the modification with a rubber crumb for bitumen produced from the residuals of crude oils of Ukrainian deposits have been studied. The thermal stability of the rubber crumb has been examined using the derivatograpgy. The mechanism of bitumen modification with the rubber crumb at low and high temperatures has been established. The influence of technological factors on the main quality indices of modified bitumen has been studied. The changes in the group composition of the original and modified bitumen were found.
{"title":"Rubber Crumb Modified Bitumen Produced from Crude Oils Residuals of Ukrainian Deposits","authors":"A. Nagurskyy, Y. Khlibyshyn, O. Grynyshyn, V. Kochubei","doi":"10.23939/CHCHT14.03.420","DOIUrl":"https://doi.org/10.23939/CHCHT14.03.420","url":null,"abstract":"1 The main regularities of the modification with a rubber crumb for bitumen produced from the residuals of crude oils of Ukrainian deposits have been studied. The thermal stability of the rubber crumb has been examined using the derivatograpgy. The mechanism of bitumen modification with the rubber crumb at low and high temperatures has been established. The influence of technological factors on the main quality indices of modified bitumen has been studied. The changes in the group composition of the original and modified bitumen were found.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85570411","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}
M. Sozanskyi, V. Stadnik, P. Shapoval, I. Yatchyshyn, R. Guminilovych, S. Shapoval, Gas Supply
The mercury selenide (HgSe) films were obtained on glass substrates via the chemical deposition method. The aqueous solutions of mercury(II) nitrate, sodium thiosulfate, sodium selenosulfate and tri-sodium citrate were used. X-ray and elemental analysis of the film sample were made. The effect of initial reagents concentration, synthesis duration and temperature on the mass of HgSe films was investigated and coatings thickness was calculated. The optical and morphological properties of HgSe films were examined. The deposition mechanism is discussed.
{"title":"Optimization of Synthesis Conditions of Mercury Selenide Thin Films","authors":"M. Sozanskyi, V. Stadnik, P. Shapoval, I. Yatchyshyn, R. Guminilovych, S. Shapoval, Gas Supply","doi":"10.23939/CHCHT14.03.290","DOIUrl":"https://doi.org/10.23939/CHCHT14.03.290","url":null,"abstract":"The mercury selenide (HgSe) films were obtained on glass substrates via the chemical deposition method. The aqueous solutions of mercury(II) nitrate, sodium thiosulfate, sodium selenosulfate and tri-sodium citrate were used. X-ray and elemental analysis of the film sample were made. The effect of initial reagents concentration, synthesis duration and temperature on the mass of HgSe films was investigated and coatings thickness was calculated. The optical and morphological properties of HgSe films were examined. The deposition mechanism is discussed.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88132938","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}
This study investigates the capability of Thuja occidentalis leaves carbon powder (TOLC) as a viable adsorbent for the expulsion of chromium(VI) from aqueous solutions. By batch mode, the removal percentage of Cr(VI) is observed to be pH perceptive and furthermore relies upon the time of equilibration, amount of the TOLC adsorbent and Cr(VI) concentration. TOLC adsorbent before and after adsorption of Cr(VI) was characterized with FTIR, SEM and EDX. Adsorption isotherm results divulge that the Langmuir model was a better fit. The kinetic studies divulge that the pseudosecond-order model was the best fit. TOLC adsorbent can be easily regenerated and utilised for several adsorption/ desorption cycles.
{"title":"Chromium(VI) Removal Using Activated Thuja Occidentalis Leaves Carbon Powder – Adsorption Isotherms and Kinetic Studies","authors":"V. D. Rao, M. Rao, M. Krishna","doi":"10.23939/CHCHT14.03.362","DOIUrl":"https://doi.org/10.23939/CHCHT14.03.362","url":null,"abstract":"This study investigates the capability of Thuja occidentalis leaves carbon powder (TOLC) as a viable adsorbent for the expulsion of chromium(VI) from aqueous solutions. By batch mode, the removal percentage of Cr(VI) is observed to be pH perceptive and furthermore relies upon the time of equilibration, amount of the TOLC adsorbent and Cr(VI) concentration. TOLC adsorbent before and after adsorption of Cr(VI) was characterized with FTIR, SEM and EDX. Adsorption isotherm results divulge that the Langmuir model was a better fit. The kinetic studies divulge that the pseudosecond-order model was the best fit. TOLC adsorbent can be easily regenerated and utilised for several adsorption/ desorption cycles.","PeriodicalId":9762,"journal":{"name":"Chemistry and Chemical Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84827031","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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