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Assessment of the ecological state of haplic chernozem contaminated by oil,fuel oil and gasoline after remediation

Petroleum Research 2024年第1期9卷 155-164页

作者： Anna Ruseva Tatiana Minnikova Sergey Kolesnikov Dmitry Trufanov Nikita Minin Sofya Revina Vladimir Gayvoronsky Southern Federal university Academy of Biology and Biotechnology344090Rostov-on-DonRussia

The intensive use of petroleum hydrocarbon products has made them priority environmental *** petroleum hydrocarbons enter the soil,a change in physical,chemical,and biological properties is *** natural restoration of oil-contaminated soils is a lengthy process;therefore,remediation is often *** aim of this study is to assess the change in the ecological state of haplic chernozem soil contaminated with oil,fuel oil,and gasoline after *** indicators of soil biological activity,such as phytotoxicity(germination,length of shoots and roots),the activity of oxidoreductase enzymes(catalase and dehydrogenases),and the total number of bacteria were *** effects of nitroammophoska fertilizer,sodium humate,biochar,and the biofertilizer“Baikal EM-1”on the ecological state of soils contaminated with oil,fuel oil,and gasoline were *** with oil,fuel oil,and gasoline decreased the values of all biological *** most sensitive indicator was the length of radish roots in soils polluted with oil,gasoline,and fuel oil after remediation with nitroammophoska and Baikal EM-1 *** length of roots was the most sensitive indicator when remediation was performed with biochar and sodium humate added to soil contaminated with oil and gasoline,and with contamination of haplic chernozem soil with fuel oil,the total number of bacteria was the most sensitive *** most effective ameliorant to phytotoxicity indicators for oil pollution was a 1 D dose of biochar,for fuel oil it was 1 D biochar and 2 D sodium humate,and for gasoline it was a 2 D dose of biochar and Baikal *** ameliorants at most of the studied doses increased dehydrogenase activity,but increased catalase activity only in some *** increase in the total number of bacteria in oil-contaminated soils was promoted by biochar and nitroammophoska at a dose of 2 *** was the most effective in ameliorant in soils contaminated with fuel

关键词： Pollution Petroleum hydrocarbons Haplic chernozem Ameliorant dose Biological indicators Soil properties

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Structure and dielectric properties of (1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3)

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Journal of Advanced Dielectrics 2024年第1期14卷 82-88页

作者： E.V.Glazunova L.A.Shilkina A.S.Chekhova A.V.Nazarenko I.A.Verbenko L.A.Reznichenko Research Institute of Physics Southern Federal University Rostov-on-Don344090Russia Faculty of Physics Southern Federal University Rostov-on-Don344090Russia Southern Scientific Center of the Russian Academy of Sciences rostov-on-don 344006Russia

The solid solutions of the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system were produced by the conventional ceramic technology using mechanical activation of the synthesized *** was found that in the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system at room temperature,a number of morphotropic phase transitions occur:rhombohedral!cubic!tetragonal!monoclinic *** introduction of a small amount of Na_(0.5)K_(0.5)NbO_(3) leads to an increase in the temperature stability of the dielectric properties of ceramics.A change in the relaxor properties of the solid solutions of the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system was *** increase in energy density and energy efficiency was found at additive 10 mol.%of Na_(0.5)K_(0.5)NbO_(3).

关键词： Ceramics lead-free materials mechanical activation dielectric properties energy storage

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Illuminating spin-crossover octanuclear metal-organic cages

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Science China Chemistry 2024年第4期67卷 1208-1215页

作者： Zhi-Kun Liu Alyona A.Starikova Yu-Xia Li Ke Sun Meng Yu Zi-Shuo Yao Jun Tao Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of TechnologyBeijing 102488China Institute of Physical and Organic Chemistry Southern Federal UniversityRostov-on-Don 344090Russia

Spin-crossover(SCO)materials that reversibly switch between high-and low-spin states have potential for the storage of spin state-relative information,and have gained much attention incorporating secondary physical properties,such as fluorescence and magneto-optical *** this study,we synthesized three octanuclear metal-organic cages(MOCs)using tetraphenylethylene-based luminophores,aldehydes,and Fe^(Ⅱ)salts,by subcomponent self-assembly approach,namely[Fe1]-[Fe3].By controlling the ligand-field strength and guest encapsulation,we finely tuned their SCO *** them,MOC[Fe2]displayed nearly complete SCO behavior in the solid state,which is rare for high-nuclearity *** also demonstrated the coupling of SCO with fluorescence emission in these MOCs by using isostructural Zn^(Ⅱ)complexes([Zn1]-[Zn3])as control experiments,for the first *** calculations revealed the energy-transfer mechanism between fluorophores and SCOactive centers,which emphasizes the significant contribution of d-d transitions in the interplay between the occurrence of SCO and fluorescence emission.

关键词： metal-organic cages spin crossover fluorescence switching materials DFT calculation

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Hydroxyapatite composites with carbon allotropes:Preparation,properties,and applications

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Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov Oxana V.Kharissova Lucy T.González Yolanda Peña Méndez Igor E.Uflyand Idalia Gómez de la Fuente Universidad Autónoma de Nuevo León Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico Department of Chemistry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite(HA)and its composites with inorganic additives,dopants,and polymers is a rapidly developing branch in the materials *** particular,carbon allotropes are widely used in these composites being widely applied for medical *** a gap of insufficient generalization of recent achievements in the field of the HA/Carbon composites,in this review we present the state of the art of the field of HA composites and hybrids with classic carbon allotropes and *** composites are known for carbon nanotubes,nanofibers,graphene and its oxidized forms,as well as,in a lesser grade,for graphite,fullerenes,nanodiamonds,carbon nanofoams,*** composites can be fabricated by a variety of classic and less-common methods,such as co-precipitation(with or without ultrasonic treatment),CVD,hot isostatic pressing,hydrothermal,spark plasma sintering,biomimetic mineralization,thermal and plasma spray,electrochemical and electrophoretic deposition,self-assembling,3D printing,electrospinning,and lyophilisation,among *** of various synthesis techniques can be also carried out for composite *** or synthetic HA can be used as it is for further interaction with carbon allotropes or it can be first prepared and then reacted with carbon counterpart;similarly,carbon allotropes can be introduced into the interaction with HA directly or they can be first synthesized,in particular from *** biocompatible composites can be produced in the form of coatings,powders,and scaffolds and can additionally contain quantitative amounts of third phases,frequently natural or synthetic *** these composites,especially with O-containing functionalizing groups,HA disadvantages could be considerably decreased with simultaneous enhancement of mechanical properties,becoming similar to human bone,chemical stability and biocompatibility,as well as possessing antibacterial ***→G reduction and higher HA decoration were obs

关键词： Hydroxyapatite Carbon nanotubes Graphene Quantum dots Fullerenes Nanodiamonds

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Binary perovskite solid solutions and trends in their phase transitions temperatures variation

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Journal of Advanced Dielectrics 2022年第1期12卷 36-44页

作者： G.A.Geguzina I.G.Popova A.E.Panich Research Institute of Physics Southern Federal University No.194Stachki Ave.Rostov-on-Don344090Russia Department of Physics Don State Technical University No.1Gagarin sq.Rostov-on-Don344000Russia Institute of High Technology and Piezotechnics Southern Federal University No.10Milchakova str.Rostov-on-Don344090Russia

Some of the known binary ABO_(3)perovskites with ferro-(FE)or antiferroelectric(AFE)at T_(C)and different magnetic phase tran-sitions(PT):ferro-and antiferromagnetic at T_(N)and also some of their solid solutions are *** correlations between their FE or AFE and/or magnetic PTs temperatures,on the one hand,and their interatomic bond A-O strains,on the other hand,have been *** is shown that in the plotted diagrams these temperatures change with a change inδAO values as follows:classical FEs are followed by multiferroics,starting with BiFeO_(3)and ending with YVO_(3),followed by classical *** the same time,the temperatures T_(C)and T_(N)experience maxima at the corresponding points for BiFeO_(3),then quickly decrease,and the difference between them,T_(C)-T_(N),basically also decreases,slightly increasing along the way to the point EuTiO_(3).which made it possible to systematize these T_(C)and T_(N).

关键词： Perovskite structure binary oxides solid solutions ferroelectric phase transition magnetic phase transition phase transition temperature

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Structure,microstructure,dielectric and piezoelectric properties of(1−x-y)BiFeO_(3)-xPbFe_(0.5)Nb_(0.5)O_(3)-yPbTiO_(3)ceramics

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Journal of Advanced Dielectrics 2022年第1期12卷 45-52页

作者： E.I.Sitalo N.A.Boldyrev L.A.Shilkina A.V.Nazarenko A.V.Nagaenko L.A.Reznichenko Research Institute of Physics Southern Federal University No 194 Stachki Ave.Rostov-on-Don 344090Russia Southern Scientific Center of RAS No.41 Chekhov Ave. Rostov-on-Don 344006Russia Institute of High Technology and Piezo Technic Southern Federal UniversityNo 10 Milchakov St.Rostov-on-Don 344090Russia

Ceramics of quasi-binary concentration section(x=0.50,0.1≤y≤0.2,Δy=0.025)of the ternary solid solution system(1−x−y)BiFeO_(3)-xPbFe_(0.5)Nb_(0.5)O_(3)-yPbTiO_(3)were prepared by the conventional solid-phase reaction *** using X-ray diffraction technique,the phase diagram of the system was constructed,which was shown to contain the regions of cubic and tetragonal symmetry and the morphotropic phase boundary between *** morphology,dielectric and piezoelectric properties of the selected solid solutions were *** highest piezoelectric coefficient d_(33)=260 pC/N was *** characteristics of ceramics revealed ferroelectric relaxor behavior,a region of diffuse phase transition from the paraelectric to ferroelectric phase in the temperature range of 350-500 K.

关键词： Dielectric properties perovskites multiferroics piezoelectric properties solid solutions

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Grain landscape and dielectric properties of ceramics based on sodium,calcium,strontium niobates,depending on the synthesis and sintering conditions,and mechanical processing

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Journal of Advanced Dielectrics 2022年第1期12卷 6-11页

作者： J.Y.Zubarev A.V.Nazarenko A.V.Nagaenko L.A.Reznitchenko Research and Technology Unit FGI SPA SET of the MIA RF rostov-on-don 344000Russia Research Institute of Physics Southern Federal university 194 Stachki Ave.Rostov-on-Don344006Russia

The properties studying results of ceramics based on strontium,calcium and sodium niobates,which vary from the conditions of synthesis,sintering,and mechanical processing,are *** evolution of the grain structure of objects is traced depending on their phase filling during concentration changes in the composition and thermodynamic prehistory(preparation conditions).

关键词： Layered perovskite-like compounds binary systems pyroniobates of calcium and strontium microstructure mechanoactivation

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Crystal structure,microstructure,electrophysical properties,and thermally induced aging of PZT-CdNb_(2)O_(6)ceramics

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Journal of Advanced Dielectrics 2022年第5期12卷 1-11页

作者： Andryushin Konstantin Pavelko Alexey Sahoo Sushrisangita Shilkina Lidiya Nagaenko Alxandr Andryushina Inna Moysa Maksim Reznichenko Larisa Research Institute of Physics Southern Federal University Rostov-on-Don344090Stachki str.194Russia Institute of High Technology and Piezo Technic Southern Federal University Rostov-on-Don344090Milchakova 10Russia

Solid solution samples of the three-component system(1−x)Pb(Ti_(0.5)Zr_(0.5))O_(3)−xCdNb_(2)O_(6)with x=0.0125-0.0500,Δx=0.0125 were obtained by solid phase synthesis followed by sintering using conventional ceramic *** crystal structure,microstructure,electrophysical,and thermophysical properties of these ceramics have been *** is shown that all studied solid solutions can be divided into two groups(with x=0.0125 and with x>0.0125),characterized by different characteristics of the change in properties with variations in external *** is probably due to the transition from a perovskite-type structure with a tetragonal(T)unit cell to inhomogeneous solid solutions consisting of a series of T-phases with similar cell parameters.A conclusion is made about the expediency of using the data obtained in the development of similar materials for devices based on them.

关键词： PZT CdNb_(2)O_(6) XRD microstructure piezoelectric properties thermophysical properties phase transition fatigue

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Synthesis and photocatalytic properties of Sn-TiO_(2) nanomaterials

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Journal of Advanced Dielectrics 2020年第1期10卷 129-138页

作者： E.M.Bayan T.G.Lupeiko L.E.Pustovaya M.G.Volkova Department of Chemistry Southern Federal university rostov-on-don 344090 Russia don state technical university rostov-on-don 344000 Russia

Sn-doped TiO_(2) nanomaterials were synthesized by sol-gel *** was shown the phase compositions and phase transitions change with the introduction of different tin amounts(0.5-20 mol.%).X-ray powder diffraction was used to study the effect of different tin amounts on the anatase-rutile phase *** was found that the introduction of ions increases the thermal stability of anatase *** material’s photocatalytic activity was studied in reaction with a model pollutant(methylene blue)photodegradation under UVand visible light *** best photocatalytic properties were shown for material,which contains 5 mol.%of Sn.

关键词： Nanomaterial titanium dioxide photocatalysis anatase wastewaters tin

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Peculiarities of the dependences of the dielectric properties of solid solutions of multicomponent systems on the electronegativity of their constituent cations

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Journal of Advanced Dielectrics 2022年第4期12卷 18-23页

作者： Andryushin Konstantin Dudkina Svetlana Shilkina Lidiya Sahoo Sushrisangita Moysa Maksim Andryushina Inna Verbenko Iliya Reznichenko Larisa Research Institute of Physics Southern Federal UniversityStachki str.194 Rostov-on-Don 344090Russia

Solid solutions(SS)of 3-and 4-component systems based on lead titanate-zirconate were prepared by the method of solid-phase reactions and uniaxial hot *** dependences of the relative permittivity of polarized samples on the electronegativity(EN)of their constituent cations have been *** ferro-hardness of the SS(the stability of the domain structure to external influences)is shown to be directly dependent on the EN of elements B in the corresponding oxidation states,i.e.,the degree of covalence of the B-O *** deviation from this dependence in SS with Ni and Cd is explained by their individual features,which result in changes in the degree of bond covalence in both cationic *** conducted crystal-chemical analysis made it possible to choose promising SS when creating ferroelectric materials,including textured piezoelectric ceramic materials for piezoelectric transducers for various purposes:Piezotransformers,piezoelectric motors,ultrasonic emitters,filter devices,ultrasonic flaw detectors,accelerometers,etc.

关键词： Solid solutions multicomponent systems lead titanate-zirconate electronegativity dielectric properties

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