The process of hexavalent chromium recovery by various eluents (alkaline solutions of sodium sulfate, alkaline solutions of sodium chloride and ammonium chloride solutions with the addition of ammonia) from saturated anion exchange resin Purolite A500/4994 was investigated. The desorption process was most efficiently carried out using ammonium chloride solutions (100 g L−1) with the addition of ammonia (1–5 %) and sodium chloride solutions (100 g L–1) with the addition of sodium hydroxide (10–50 g L−1). The degree of chromium recovery was more than 98 %. The chromium content in pregnant solution was 14–23 g/L. When using alkaline solutions of sodium sulfate for regeneration, chromium recovery degree was 78–96 %. In addition, the chromium content in pregnant solution did not exceed 6 g/L.The process of hexavalent chromium recovery by various eluents (alkaline solutions of sodium sulfate, alkaline solutions of sodium chloride and ammonium chloride solutions with the addition of ammonia) from saturated anion exchange resin Purolite A500/4994 was investigated. The desorption process was most efficiently carried out using ammonium chloride solutions (100 g L−1) with the addition of ammonia (1–5 %) and sodium chloride solutions (100 g L–1) with the addition of sodium hydroxide (10–50 g L−1). The degree of chromium recovery was more than 98 %. The chromium content in pregnant solution was 14–23 g/L. When using alkaline solutions of sodium sulfate for regeneration, chromium recovery degree was 78–96 %. In addition, the chromium content in pregnant solution did not exceed 6 g/L.
研究了饱和阴离子交换树脂Purolite A500/4994中不同洗脱液(硫酸钠碱性溶液、氯化钠碱性溶液和加氨氯化铵溶液)回收六价铬的工艺。氯化铵溶液(100 g L - 1)加1 - 5%氨水，氯化钠溶液(100 g L - 1)加10-50 g氢氧化钠，解吸效果最好。铬的回收率达98%以上。妊娠液中铬含量为14 ~ 23 g/L。用碱性硫酸钠溶液再生时，铬的回收率为78 ~ 96%。此外，妊娠液中铬含量不超过6 g/L。研究了饱和阴离子交换树脂Purolite A500/4994中不同洗脱液(硫酸钠碱性溶液、氯化钠碱性溶液和加氨氯化铵溶液)回收六价铬的工艺。氯化铵溶液(100 g L - 1)加1 - 5%氨水，氯化钠溶液(100 g L - 1)加10-50 g氢氧化钠，解吸效果最好。铬的回收率达98%以上。妊娠液中铬含量为14 ~ 23 g/L。用碱性硫酸钠溶液再生时，铬的回收率为78 ~ 96%。此外，妊娠液中铬含量不超过6 g/L。
{"title":"The regeneration of saturated ionites after extraction of hexavalent chromium from wastewater of chromium production plant","authors":"A. Pastukhov, M. L. Chernyi, S. Skripchenko","doi":"10.1063/1.5134198","DOIUrl":"https://doi.org/10.1063/1.5134198","url":null,"abstract":"The process of hexavalent chromium recovery by various eluents (alkaline solutions of sodium sulfate, alkaline solutions of sodium chloride and ammonium chloride solutions with the addition of ammonia) from saturated anion exchange resin Purolite A500/4994 was investigated. The desorption process was most efficiently carried out using ammonium chloride solutions (100 g L−1) with the addition of ammonia (1–5 %) and sodium chloride solutions (100 g L–1) with the addition of sodium hydroxide (10–50 g L−1). The degree of chromium recovery was more than 98 %. The chromium content in pregnant solution was 14–23 g/L. When using alkaline solutions of sodium sulfate for regeneration, chromium recovery degree was 78–96 %. In addition, the chromium content in pregnant solution did not exceed 6 g/L.The process of hexavalent chromium recovery by various eluents (alkaline solutions of sodium sulfate, alkaline solutions of sodium chloride and ammonium chloride solutions with the addition of ammonia) from saturated anion exchange resin Purolite A500/4994 was investigated. The desorption process was most efficiently carried out using ammonium chloride solutions (100 g L−1) with the addition of ammonia (1–5 %) and sodium chloride solutions (100 g L–1) with the addition of sodium hydroxide (10–50 g L−1). The degree of chromium recovery was more than 98 %. The chromium content in pregnant solution was 14–23 g/L. When using alkaline solutions of sodium sulfate for regeneration, chromium recovery degree was 78–96 %. In addition, the chromium content in pregnant solution did not exceed 6 g/L.","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116962447","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}
R. I. Kamalova, A. M. Minzagirova, M. Galikhanov, R. R. Spiridonova, A. Guzhova, R. Khairullin
The paper describes electret characteristics of polylactic acids and its composites with montomorillonite at different ratios of the components. Electret properties behavior patterns of both pure and composite polylactic acid films showed two regions – the region of the sharp charge drop and the region of its slight decrease. The sharp drop of the film charge results from a release of charge carriers from the small (surface) energy traps. Following this, the total charge value is determined by the number of injected charge carriers captured by the deeper energy traps. Corona electrets based on polylactic acid have poor electret properties due to significant impact of heterocharge. Addition of montmorillonite increased electret properties of the PLA – 2 % montmorillonite in the composition improved electret performances by 5–10 times, 4 % montmorillonite – by 10–18 times. This significant effect of the fine filler on the electret properties of the polylactic acid arises from high specific surface area of montmorillonite that results in large number of macromolecules being adsorbed on the surface of the nanoparticles. Homocharge relaxation rate reduction due to fine filled addition to the polylactic acid was shown not to be the result of changes in specific surface and volume resistivity of the material. ATR-IR spectroscopy revealed no considerable changes in the chemical structure of the surface of polylactic acid filled with nanoparticles. It was concluded that montomorillonite addition to polylactic acid increased electret properties due to generation of new injected charge carrier traps at a polymer-filler interface boundary. The addition of 4 % montmorillonite was the most efficient for enhancing electret properties of polylactic acid.
{"title":"Electret properties of polylactic acid – Montmorillonite composites","authors":"R. I. Kamalova, A. M. Minzagirova, M. Galikhanov, R. R. Spiridonova, A. Guzhova, R. Khairullin","doi":"10.1063/1.5134177","DOIUrl":"https://doi.org/10.1063/1.5134177","url":null,"abstract":"The paper describes electret characteristics of polylactic acids and its composites with montomorillonite at different ratios of the components. Electret properties behavior patterns of both pure and composite polylactic acid films showed two regions – the region of the sharp charge drop and the region of its slight decrease. The sharp drop of the film charge results from a release of charge carriers from the small (surface) energy traps. Following this, the total charge value is determined by the number of injected charge carriers captured by the deeper energy traps. Corona electrets based on polylactic acid have poor electret properties due to significant impact of heterocharge. Addition of montmorillonite increased electret properties of the PLA – 2 % montmorillonite in the composition improved electret performances by 5–10 times, 4 % montmorillonite – by 10–18 times. This significant effect of the fine filler on the electret properties of the polylactic acid arises from high specific surface area of montmorillonite that results in large number of macromolecules being adsorbed on the surface of the nanoparticles. Homocharge relaxation rate reduction due to fine filled addition to the polylactic acid was shown not to be the result of changes in specific surface and volume resistivity of the material. ATR-IR spectroscopy revealed no considerable changes in the chemical structure of the surface of polylactic acid filled with nanoparticles. It was concluded that montomorillonite addition to polylactic acid increased electret properties due to generation of new injected charge carrier traps at a polymer-filler interface boundary. The addition of 4 % montmorillonite was the most efficient for enhancing electret properties of polylactic acid.","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117060365","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. N. Mozharovskaya, Yu. A. Lykova, V. Semenishchev
{"title":"Systematization of chemical pollutants in samples of river water in Yekaterinburg city and Sverdlovsk Region","authors":"P. N. Mozharovskaya, Yu. A. Lykova, V. Semenishchev","doi":"10.1063/1.5134319","DOIUrl":"https://doi.org/10.1063/1.5134319","url":null,"abstract":"","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127454224","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}
{"title":"The study of possible use of lactic bacteria in brewing","authors":"N. Chervina, I. V. Geide, I. Selezneva","doi":"10.1063/1.5134250","DOIUrl":"https://doi.org/10.1063/1.5134250","url":null,"abstract":"","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122616480","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}
{"title":"Movement of head and center of mass: Joint assessment","authors":"V. Vasilyev, V. Borisov, A. Syskov","doi":"10.1063/1.5134335","DOIUrl":"https://doi.org/10.1063/1.5134335","url":null,"abstract":"In this study","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114597235","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. Gerzen, I. Simanova, S. Nabiev, L. Nikitina, I. Selezneva
Lead intoxication was modelled by intraperitoneal injection of lead acetate to rats 3 times a week during 5 weeks. The velocity of thin filaments movement at different calcium concentrations over myosin extracted from the right ventricle of the rats’ hearts of control group and group with lead intoxication was estimated using an in vitro motility assay. Lead intoxication reduced the maximum velocity of movement by 30% because of the shift of myosin isoforms towards slow ones and did not influence on calcium regulation.
{"title":"The influence of lead ions on the mechanical function of right ventricle myocardium","authors":"O. Gerzen, I. Simanova, S. Nabiev, L. Nikitina, I. Selezneva","doi":"10.1063/1.5134322","DOIUrl":"https://doi.org/10.1063/1.5134322","url":null,"abstract":"Lead intoxication was modelled by intraperitoneal injection of lead acetate to rats 3 times a week during 5 weeks. The velocity of thin filaments movement at different calcium concentrations over myosin extracted from the right ventricle of the rats’ hearts of control group and group with lead intoxication was estimated using an in vitro motility assay. Lead intoxication reduced the maximum velocity of movement by 30% because of the shift of myosin isoforms towards slow ones and did not influence on calcium regulation.","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116821488","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}
D. Seitov, Y. A. Gracheva, K. Nekrasov, A. Kupryazhkin, Sanjeev K. Gupta, A. Akilbekov
A molecular dynamics simulation of sintering of two octahedral uranium dioxide nanocrystals contacting in the vertex region is carried out. Two main stages of the sintering process are observed. At the beginning of the simulation, the neck between the crystallites is formed due to the mutual attraction of the adjacent (111) faces. Further increase in the neck thickness occurs due to transport of the material from the surface of the crystallites in a much slower diffusion process. The estimate of the activation energy of this process is in the range from 11 to 14 eV.A molecular dynamics simulation of sintering of two octahedral uranium dioxide nanocrystals contacting in the vertex region is carried out. Two main stages of the sintering process are observed. At the beginning of the simulation, the neck between the crystallites is formed due to the mutual attraction of the adjacent (111) faces. Further increase in the neck thickness occurs due to transport of the material from the surface of the crystallites in a much slower diffusion process. The estimate of the activation energy of this process is in the range from 11 to 14 eV.
{"title":"Sintering of uranium dioxide nanoparticles. A molecular dynamics simulation","authors":"D. Seitov, Y. A. Gracheva, K. Nekrasov, A. Kupryazhkin, Sanjeev K. Gupta, A. Akilbekov","doi":"10.1063/1.5134209","DOIUrl":"https://doi.org/10.1063/1.5134209","url":null,"abstract":"A molecular dynamics simulation of sintering of two octahedral uranium dioxide nanocrystals contacting in the vertex region is carried out. Two main stages of the sintering process are observed. At the beginning of the simulation, the neck between the crystallites is formed due to the mutual attraction of the adjacent (111) faces. Further increase in the neck thickness occurs due to transport of the material from the surface of the crystallites in a much slower diffusion process. The estimate of the activation energy of this process is in the range from 11 to 14 eV.A molecular dynamics simulation of sintering of two octahedral uranium dioxide nanocrystals contacting in the vertex region is carried out. Two main stages of the sintering process are observed. At the beginning of the simulation, the neck between the crystallites is formed due to the mutual attraction of the adjacent (111) faces. Further increase in the neck thickness occurs due to transport of the material from the surface of the crystallites in a much slower diffusion process. The estimate of the activation energy of this process is in the range from 11 to 14 eV.","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129083859","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. Gordeev, M. Mashkovtsev, D. Aleshin, S. V. Buynachev, N. Zhirenkina, E. Baksheev, D. A. Danilov
Mixed hydroxonitrates (Y0.95Eu0.05)2(OH)5NO3 were obtained by the precipitation method at a constant pH value of 7. Intercalation of the obtained layered hydroxide with dodecyl sulfate ions and exfoliation of intercalated crystals of layered hydroxides by formamide with the formation of a colloidal suspension were performed. Thin transparent optical coatings were obtained using this colloidal suspension.
{"title":"Synthesis of (Y0.95Eu0.05)2O3 thin transparent oxide films from layered rare earth hydroxides prepared by coprecipitation at a constant pH value","authors":"E. Gordeev, M. Mashkovtsev, D. Aleshin, S. V. Buynachev, N. Zhirenkina, E. Baksheev, D. A. Danilov","doi":"10.1063/1.5134171","DOIUrl":"https://doi.org/10.1063/1.5134171","url":null,"abstract":"Mixed hydroxonitrates (Y0.95Eu0.05)2(OH)5NO3 were obtained by the precipitation method at a constant pH value of 7. Intercalation of the obtained layered hydroxide with dodecyl sulfate ions and exfoliation of intercalated crystals of layered hydroxides by formamide with the formation of a colloidal suspension were performed. Thin transparent optical coatings were obtained using this colloidal suspension.","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129200150","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. Danilenko, D. Zamyatin, S. Votyakov, I. S. Chashchukhin
{"title":"Local analysis of oxidation state of iron in oxide minerals using electron microprobe","authors":"I. Danilenko, D. Zamyatin, S. Votyakov, I. S. Chashchukhin","doi":"10.1063/1.5134168","DOIUrl":"https://doi.org/10.1063/1.5134168","url":null,"abstract":"","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123935474","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, we study the process of nonlinear growth of spherical crystals in supercooled single-component melts with the Meirs nucleation kinetics. The balance and Fokker-Planck equations are solved with allowance for the power-dependent law for the crystal growth rate. It is shown that the melt supercooling is a decreasing function of time due to the latent heat release by the growing solid phase particles.In this paper, we study the process of nonlinear growth of spherical crystals in supercooled single-component melts with the Meirs nucleation kinetics. The balance and Fokker-Planck equations are solved with allowance for the power-dependent law for the crystal growth rate. It is shown that the melt supercooling is a decreasing function of time due to the latent heat release by the growing solid phase particles.
{"title":"Mathematical modeling of nonlinear growth rates of crystals with allowance for Meirs kinetics","authors":"E. Makoveeva","doi":"10.1063/1.5134287","DOIUrl":"https://doi.org/10.1063/1.5134287","url":null,"abstract":"In this paper, we study the process of nonlinear growth of spherical crystals in supercooled single-component melts with the Meirs nucleation kinetics. The balance and Fokker-Planck equations are solved with allowance for the power-dependent law for the crystal growth rate. It is shown that the melt supercooling is a decreasing function of time due to the latent heat release by the growing solid phase particles.In this paper, we study the process of nonlinear growth of spherical crystals in supercooled single-component melts with the Meirs nucleation kinetics. The balance and Fokker-Planck equations are solved with allowance for the power-dependent law for the crystal growth rate. It is shown that the melt supercooling is a decreasing function of time due to the latent heat release by the growing solid phase particles.","PeriodicalId":418936,"journal":{"name":"PHYSICS, TECHNOLOGIES AND INNOVATION (PTI-2019): Proceedings of the VI International Young Researchers’ Conference","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123444027","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：