Pub Date : 2019-05-31DOI: 10.18524/2304-0947.2019.2(70).169230
I. I. Gaidarzhy, L. A. Motnyak, B. V. Kunshenko
{"title":"SYNTHESIS OF FLUORINE-CONTAINING ANALOGS OF ANESTHESINE AND NOVOKAINE","authors":"I. I. Gaidarzhy, L. A. Motnyak, B. V. Kunshenko","doi":"10.18524/2304-0947.2019.2(70).169230","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.2(70).169230","url":null,"abstract":"","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"210 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77490512","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}
Pub Date : 2019-05-31DOI: 10.18524/2304-0947.2019.2(70).169222
A. Slipkan, M. I. Kharlova, A. Shtemenko, N. Shtemenko
{"title":"FLUORESCENT NANOPARTICLES LOADED WITH RHENIUM COMPOUNDS AND THEIR BIOCOMPATIBILITY WITH ERYTHROCYTES","authors":"A. Slipkan, M. I. Kharlova, A. Shtemenko, N. Shtemenko","doi":"10.18524/2304-0947.2019.2(70).169222","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.2(70).169222","url":null,"abstract":"","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"126 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87891676","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}
Pub Date : 2019-05-31DOI: 10.18524/2304-0947.2019.2(70).169214
O. Sevast’yanov, Yu. A. Shesterenko, A. A. Rizhak, I. Romanovska, L. Varbanets
{"title":"KINETICS OF CASEIN HYDROLYSIS BY FREE AND IMMOBILIZED PEPTIDASE FROM BACILLUS THURINGIENSIS VAR. ISRAELENSIS IMB B-7465","authors":"O. Sevast’yanov, Yu. A. Shesterenko, A. A. Rizhak, I. Romanovska, L. Varbanets","doi":"10.18524/2304-0947.2019.2(70).169214","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.2(70).169214","url":null,"abstract":"","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"2011 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86348108","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}
Pub Date : 2019-05-31DOI: 10.18524/2304-0947.2019.2(70).169226
L. Soldatkina, M. A. Zavrichko
{"title":"OBTAINING OF ADSORBENTS USING CITRIC ACID MODIFICATION OF PLANT WASTE","authors":"L. Soldatkina, M. A. Zavrichko","doi":"10.18524/2304-0947.2019.2(70).169226","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.2(70).169226","url":null,"abstract":"","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76475647","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}
Pub Date : 2019-05-31DOI: 10.18524/2304-0947.2019.2(70).169231
O. Korniienko
The systems containing ceria, dysprosium and zirconia are perspective for the development of energy saving technological solutions and solid oxide fuel cells (SOFC). Ceramics based on ZrO 2 is used as a high temperature electrolyte for SOFC. The solid solutions based on CeО 2 are the most perspective electrolytes, operating at moderate temperatures, because of their ionic conductivity and high sensitivity to changes of oxygen partial pressure is much higher than ones of ZrO 2 stabilized with Y 2 O 3 (YSZ). In the present work, first the phase equilibria and physicochemical properties for solid solutions in the ternary ZrО 2 -CeО 2 -Dy 2 O 3 system at temperature 1500 °С (150 h) in air were studied by X-ray diffraction in the overall concentration range of compositions. Cerium oxide nitrate Ce(NO 3 ) 3 ∙6H 2 O and zirconium oxide nitrate ZrO(NO 3 ) 2 ×2Н 2 О of grade «ch» (above 98%, dysprosium oxide (99.99 % produced by Merck Corp.) and analytical-grade nitric acid were used as the starting materials. Samples were prepared with a concentration step of 1-5 mol % from nitrate solutions with subsequent evaporation and decomposіtion of nitrates into oxides through annealing at 1200 °С for 2 h. Powders were pressed in pellets (diameter 5 mm, height 4 mm) under a pressure of 10-30 MPа. XRD analysis of samples was performed by powder procedure on a DRON-3 apparatus at ambient temperature under CuКa radiation. Scanning step was 0.05-0.1 degrees in the range 2θ = 15–90°. Lattice parameters were calculated by the least square method using the LATTIC computer code with an error of not lower than 0.0001 nm for the cubic phase. Any new phase in the ternary system was revealed at 1500 °С. The structure of the boundary binary systems defines the phase equilibria in the ZrО 2 -CeО 2 -Dy 2 O 3 system. Solid solutions based on tetragonal (Т) modification ZrО 2 , cubic (С) modification Dy 2 O 3 and cubic with fluorite-type structure (F) modifications СеО 2 (ZrО 2 ) were determined.
{"title":"PHASE RELATION STUDIES IN THE ZrO2-CeO2-Dy2O3 SYSTEM AT 1500 °С","authors":"O. Korniienko","doi":"10.18524/2304-0947.2019.2(70).169231","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.2(70).169231","url":null,"abstract":"The systems containing ceria, dysprosium and zirconia are perspective for the development of energy saving technological solutions and solid oxide fuel cells (SOFC). Ceramics based on ZrO 2 is used as a high temperature electrolyte for SOFC. The solid solutions based on CeО 2 are the most perspective electrolytes, operating at moderate temperatures, because of their ionic conductivity and high sensitivity to changes of oxygen partial pressure is much higher than ones of ZrO 2 stabilized with Y 2 O 3 (YSZ). In the present work, first the phase equilibria and physicochemical properties for solid solutions in the ternary ZrО 2 -CeО 2 -Dy 2 O 3 system at temperature 1500 °С (150 h) in air were studied by X-ray diffraction in the overall concentration range of compositions. Cerium oxide nitrate Ce(NO 3 ) 3 ∙6H 2 O and zirconium oxide nitrate ZrO(NO 3 ) 2 ×2Н 2 О of grade «ch» (above 98%, dysprosium oxide (99.99 % produced by Merck Corp.) and analytical-grade nitric acid were used as the starting materials. Samples were prepared with a concentration step of 1-5 mol % from nitrate solutions with subsequent evaporation and decomposіtion of nitrates into oxides through annealing at 1200 °С for 2 h. Powders were pressed in pellets (diameter 5 mm, height 4 mm) under a pressure of 10-30 MPа. XRD analysis of samples was performed by powder procedure on a DRON-3 apparatus at ambient temperature under CuКa radiation. Scanning step was 0.05-0.1 degrees in the range 2θ = 15–90°. Lattice parameters were calculated by the least square method using the LATTIC computer code with an error of not lower than 0.0001 nm for the cubic phase. Any new phase in the ternary system was revealed at 1500 °С. The structure of the boundary binary systems defines the phase equilibria in the ZrО 2 -CeО 2 -Dy 2 O 3 system. Solid solutions based on tetragonal (Т) modification ZrО 2 , cubic (С) modification Dy 2 O 3 and cubic with fluorite-type structure (F) modifications СеО 2 (ZrО 2 ) were determined.","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91148858","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}
Pub Date : 2019-05-31DOI: 10.18524/2304-0947.2019.2(70).169213
N. Shmatkova, I. Seifullina, A. Morozov
By interaction of SnCl 4 with condensation products of dihydrazides of oxalic, terephthalic, malonic acids and R-benzoic aldehydes (R = Н, 4-N(CH 3 ) 2 , 2-OH) in acetonitrile, the following complexes were synthesized: with oxaloyl- [SnCl 4 (H 2 Oxb)]∙CH 3 CN (R = Н, I ), [SnCl 4 (Oxdb∙2H)]·2CH 3 CN (R = 4-N(CH 3 ) 2 , II ), [SnCl 4 (H 4 Oxs)]∙CH 3 CN (R = 2-OH, III ), терефталоїл- [(SnCl 4 )2(μ-Tfdb·2H)]∙2CH 3 CN (R = 4-N(CH 3 ) 2 , IV ), [SnCl 4 (μ-H 2 Tfs)]∙CH 3 CN (R = 2-OH, V ), malonoyldihydrazones- [SnCl 4 (μ-Maldb·2H)]·2CH 3 CN (R = 4-N(CH 3 ) 2 , VI ), [SnCl 4 (μ-H 2 Mals)] ∙ CH 3 CN (R = 2-OH, VII ). Their composition and structure are established by the methods of elemental analysis, conductometry, thermogravimetry, and IR spectroscopy. It was established that in the absence of a spacer (X = 0) in the dihydrazone molecules of R-benzoic aldehydes (R = H, 2-OH, 4-N(CH 3 ) 2 ) – oxaloyl dihydrazones, regardless of the presence of functional groups (CН=N, OH) as part of these molecules, SnCl 4 forms only mononuclear complexes I-III with the same O,O- coordination and composition of the coordination node, the charge of which is determined by a substituent (R) in the aldehyde fragment: R = H, 2-OH – {SnCl 4 O 2 }, R = 4-N(CH 3 ) 2 – {SnCl 4 O 2 } 2- . In the presence of a spacer in dihydrazone molecules, regardless of their stereochemical rigidity (X = -C 6 H 4 -, -CH 2 -), only if R = 2-OH, 4-N(CH 3 ) 2 , binuclear Sn(IV) complexes are formed with spatially separated coordination nodes, the composition of the nodes and the dihydrazone denatism is been determined by the substituent (R): R = 4-N(CH 3 ) 2 – {SnCl 4 ON} 2 - (tetra- in IV, VI ), R = 2-OH – {SnCl 3 O 2 N} (hexacoordinated ligand in V, VII ). Coordination of dihydrazones in a enol form, both in mono- ( II ) and in binuclear complexes ( IV, VI ), is a consequence of the presence of vacant nitrogen atoms in the aldehyde fragments of their molecules (R = 4-N(CH3)2); due to their protonation, a negative charge is compensated, which is localized in this case at the coordination sites of the zwitterionic complexes {SnCl 4 O 2 } 2- ( II ) and {SnCl 4 ON} 2- ( IV , VI ). The patterns of the formation of each spatially separated coordination node and the tautomeric form of the ligands in IV-VII are the same as in mononuclear tin(IV) complexes.
{"title":"SYNTHESIS, STRUCTURE OF MONO- AND BINUCLEAR COMPLEXES OF Sn(IV) WITH DIHYDRAZONES OF AROMATIC ALDEHYDES","authors":"N. Shmatkova, I. Seifullina, A. Morozov","doi":"10.18524/2304-0947.2019.2(70).169213","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.2(70).169213","url":null,"abstract":"By interaction of SnCl 4 with condensation products of dihydrazides of oxalic, terephthalic, malonic acids and R-benzoic aldehydes (R = Н, 4-N(CH 3 ) 2 , 2-OH) in acetonitrile, the following complexes were synthesized: with oxaloyl- [SnCl 4 (H 2 Oxb)]∙CH 3 CN (R = Н, I ), [SnCl 4 (Oxdb∙2H)]·2CH 3 CN (R = 4-N(CH 3 ) 2 , II ), [SnCl 4 (H 4 Oxs)]∙CH 3 CN (R = 2-OH, III ), терефталоїл- [(SnCl 4 )2(μ-Tfdb·2H)]∙2CH 3 CN (R = 4-N(CH 3 ) 2 , IV ), [SnCl 4 (μ-H 2 Tfs)]∙CH 3 CN (R = 2-OH, V ), malonoyldihydrazones- [SnCl 4 (μ-Maldb·2H)]·2CH 3 CN (R = 4-N(CH 3 ) 2 , VI ), [SnCl 4 (μ-H 2 Mals)] ∙ CH 3 CN (R = 2-OH, VII ). Their composition and structure are established by the methods of elemental analysis, conductometry, thermogravimetry, and IR spectroscopy. It was established that in the absence of a spacer (X = 0) in the dihydrazone molecules of R-benzoic aldehydes (R = H, 2-OH, 4-N(CH 3 ) 2 ) – oxaloyl dihydrazones, regardless of the presence of functional groups (CН=N, OH) as part of these molecules, SnCl 4 forms only mononuclear complexes I-III with the same O,O- coordination and composition of the coordination node, the charge of which is determined by a substituent (R) in the aldehyde fragment: R = H, 2-OH – {SnCl 4 O 2 }, R = 4-N(CH 3 ) 2 – {SnCl 4 O 2 } 2- . In the presence of a spacer in dihydrazone molecules, regardless of their stereochemical rigidity (X = -C 6 H 4 -, -CH 2 -), only if R = 2-OH, 4-N(CH 3 ) 2 , binuclear Sn(IV) complexes are formed with spatially separated coordination nodes, the composition of the nodes and the dihydrazone denatism is been determined by the substituent (R): R = 4-N(CH 3 ) 2 – {SnCl 4 ON} 2 - (tetra- in IV, VI ), R = 2-OH – {SnCl 3 O 2 N} (hexacoordinated ligand in V, VII ). Coordination of dihydrazones in a enol form, both in mono- ( II ) and in binuclear complexes ( IV, VI ), is a consequence of the presence of vacant nitrogen atoms in the aldehyde fragments of their molecules (R = 4-N(CH3)2); due to their protonation, a negative charge is compensated, which is localized in this case at the coordination sites of the zwitterionic complexes {SnCl 4 O 2 } 2- ( II ) and {SnCl 4 ON} 2- ( IV , VI ). The patterns of the formation of each spatially separated coordination node and the tautomeric form of the ligands in IV-VII are the same as in mononuclear tin(IV) complexes.","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84898198","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}
Pub Date : 2019-05-31DOI: 10.18524/2304-0947.2019.2(70).169224
N. Fed’ko, V. F. Anikin, M. Shevchenko, V. Stankevych
{"title":"SYNTHESIS OF N-CARBOXYETHYLNAPHTHALIMIDES WITH FRAGMENTS OF PRIMARY AND SECONDARY AMINES IN POSITIONS 4 AND 5","authors":"N. Fed’ko, V. F. Anikin, M. Shevchenko, V. Stankevych","doi":"10.18524/2304-0947.2019.2(70).169224","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.2(70).169224","url":null,"abstract":"","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"285 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77138571","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}
Pub Date : 2019-03-04DOI: 10.18524/2304-0947.2019.1(69).158415
I. Seifullina, А. Pesaroglo, E. Martsinko, E. Chebanenko, A. P. Pozharitskiy
of Germanium (IV) and with ethylidenediphosphonic acid (H hedp) [Mg(H 6 3 ( m ( m 2 ( ) synthesized. Its composition and structure was established with the methods of analysis and IR-spectroscopy, thermal stability was also described. The synthesized complex is crystallohydrate, this is confirmed with the band n (Н 2 О) in the IR-spectrum at 3433 cm -1 and clear band d (Н 2 О)=1661 сm -1 of the coordinated water molecules. In the IR-spectra of I there are presented stretching vibration band of the bond Ge-O (589 сm -1 ) and deformation vibration band of Ge-О-Н (821 см -1 ), which means that Ge is in the hydrolyzed form. Hydroxyl group is a bridging ligand, this is confirmed with presence of the deformation vibration bands at 1010 сm -1 . There also appear absorption bands at 1197, 1058 and 980 сm -1 , which are typical for n as (PO 3 ) and n s (PO 3 ). This shows that only completely deprotonated phosphoric groups PO 32- are presented in the compound I . On the thermogram I two low-temperature effects are presented at 70-110 °С and 110-170 °С. According to the temperature of elimination, 20 water molecules in the calculation for one formula unit are crystallization and 18 – are coordination. It was established, that application of this compound for the secondary tillage of the seeds of winter wheat promotes the increasing of its effective germination (75%), intensive increasing of the overland mass of the plant (17 cm) and primary root system (7.5 cm). These rates are much higher comparatively to the control and etalon – complex fertilizer Novalon. The application of new compound increases chances to obtain friendly and well-developed seedlings of wheat, that are able to ensure the frost resistance and receiving of high harvest. The obtained results indicate the perspective of future studies of the synthesized compound on the different plants with the aim of its implementation it in the planting practice as an effective simulator of growth.
锗(IV)与乙基二膦酸(H hedp) [Mg(h6.3 (m (m2))]合成。用红外光谱和分析方法确定了其组成和结构，并对其热稳定性进行了描述。合成的配合物为晶体水合物，在3433 cm -1处的红外光谱带n (Н 2 О)和配位水分子的清晰带d (Н 2 О)=1661 m -1处证实了这一点。在I的红外光谱中存在Ge- o键的拉伸振动带(589 сm -1)和Ge-О-Н键的变形振动带(821 сm -1)，说明Ge处于水解态。羟基是一个桥接配体，在1010 m -1处存在变形振动带证实了这一点。在1197、1058和980 μ m -1处也出现了典型的吸收带，这是n as (PO 3)和n s (PO 3)的典型吸收带。这表明在化合物I中只存在完全去质子化的磷酸基团PO 32-。在热图1上，出现了70-110°С和110-170°С两种低温效应。根据消热温度计算，1个分子式单元中有20个水分子为结晶，18个水分子为配位。结果表明，在冬小麦种子二次耕作中施用该化合物可提高种子的有效发芽率(75%)，提高植株的地上质量(17 cm)和初生根系(7.5 cm)。这些速率比对照和等龙复合肥料诺瓦隆要高得多。新化合物的施用增加了获得友好和发育良好的小麦幼苗的机会，从而能够确保抗冻和获得高产。研究结果表明，合成的化合物在不同植物上的研究前景广阔，其目的是将其作为一种有效的生长模拟器应用于种植实践。
{"title":"SYNTHESIS AND STRUCTURE OF THE MAGNESIUM 1 HYDROXYETHYLIDENEDIPHOSPHONATEGERMANATE(IV), ITS INFLUENCE ON THE GROWTH AND DEVELOPMENT OF WINTER WHEAT","authors":"I. Seifullina, А. Pesaroglo, E. Martsinko, E. Chebanenko, A. P. Pozharitskiy","doi":"10.18524/2304-0947.2019.1(69).158415","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.1(69).158415","url":null,"abstract":"of Germanium (IV) and with ethylidenediphosphonic acid (H hedp) [Mg(H 6 3 ( m ( m 2 ( ) synthesized. Its composition and structure was established with the methods of analysis and IR-spectroscopy, thermal stability was also described. The synthesized complex is crystallohydrate, this is confirmed with the band n (Н 2 О) in the IR-spectrum at 3433 cm -1 and clear band d (Н 2 О)=1661 сm -1 of the coordinated water molecules. In the IR-spectra of I there are presented stretching vibration band of the bond Ge-O (589 сm -1 ) and deformation vibration band of Ge-О-Н (821 см -1 ), which means that Ge is in the hydrolyzed form. Hydroxyl group is a bridging ligand, this is confirmed with presence of the deformation vibration bands at 1010 сm -1 . There also appear absorption bands at 1197, 1058 and 980 сm -1 , which are typical for n as (PO 3 ) and n s (PO 3 ). This shows that only completely deprotonated phosphoric groups PO 32- are presented in the compound I . On the thermogram I two low-temperature effects are presented at 70-110 °С and 110-170 °С. According to the temperature of elimination, 20 water molecules in the calculation for one formula unit are crystallization and 18 – are coordination. It was established, that application of this compound for the secondary tillage of the seeds of winter wheat promotes the increasing of its effective germination (75%), intensive increasing of the overland mass of the plant (17 cm) and primary root system (7.5 cm). These rates are much higher comparatively to the control and etalon – complex fertilizer Novalon. The application of new compound increases chances to obtain friendly and well-developed seedlings of wheat, that are able to ensure the frost resistance and receiving of high harvest. The obtained results indicate the perspective of future studies of the synthesized compound on the different plants with the aim of its implementation it in the planting practice as an effective simulator of growth.","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79938794","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}
Pub Date : 2019-03-04DOI: 10.18524/2304-0947.2019.1(69).158416
A. Truba, T. Rakitskaya, D. A. Gerega, G. Dzhyga
{"title":"SOME REGULARITIES OF OZONE DECOMPOSITION OVER NATURAL BENTONITE ANCHORED 3d METAL ACIDO COMPLEXES","authors":"A. Truba, T. Rakitskaya, D. A. Gerega, G. Dzhyga","doi":"10.18524/2304-0947.2019.1(69).158416","DOIUrl":"https://doi.org/10.18524/2304-0947.2019.1(69).158416","url":null,"abstract":"","PeriodicalId":19451,"journal":{"name":"Odesa National University Herald. Chemistry","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77325912","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}
Pub Date : 2019-03-04DOI: 10.18524/2304-0947.2019.1(69).158422
A. Tymchuk, K. A. Kvasuk
Natural flocculants as chitosan and sodium alginate has physic-chemical properties: biodegradability, reaction and complexing ability, compatibility with living tissues without toxicity. Researches had shown that chitosan and sodium alginate can be used for flocculation of suspensions, sorption from aqueous solutions of heavy metals. Sorption has a specific role in the flocculation process. Sorption determined by the nature, molecular weight, concentration, charge density of the flocculants, as well as the properties of dispersions. It is necessary to understand the mechanism of processes in these systems in order to select an effective flocculants. The mechanism of action of natural flocculants is different from synthetic. The state of biopolymers depends on the pH of the solution. A positive effect on flocculation exerted by the addition of inorganic substances, surfactants or oppositely charged polyelectrolytes. The aim of our researches was to study the flocculation ability of compositions natural flocculants and surfactants. It was studied sedimentation stability of suspensions ground sediments containing macromolecular substances (flocculants) and cationic surfactants. It was shown that the sedimentation stability defines as flocculants characteristics such as molecular weight, concentration, nature of flocculants, polyelectrolyte’s charge density and nature of the suspensions. It was found that compositions of natural flocculants chitosan and sodium alginate with surfactants are effective. The findings suggest that the studied compositions of natural flocculants have significant potential for use, thanks to a number of advantages: the efficiency of their actions, low reagent consumption, environmental safety.
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