Teimuraz Kordzakhia

Teimuraz Kordzakhia
Ivane Javakhishvili Tbilisi State University | TSU · Petre Melikishvili Institute of Physics and Organic Chemistry

About

92
Publications
8,158
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87
Citations
Citations since 2017
47 Research Items
82 Citations
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
Additional affiliations
September 1975 - present
Ivane Javakhishvili Tbilisi State University
Position
  • Head of Department
Education
March 2000 - March 2003
Petre Melikishvili Institute of Physical and Organic Chemistry
Field of study

Publications

Publications (92)
Article
Wastewater and natural waters contain various pollutants of both natural and artificial origin. Treatment of these waters is carried out comprehensively by various methods, which significantly increases costs. Currently, the problem of a large amount of drugs entering the wastewater is very relevant. Drugs, unchanged or in the form of metabolites,...
Article
Phosphates are specific compounds of the composition of living organisms, that play a special role in plant and animal life. The skeleton of most living organisms consists mainly of calcium, sodium, magnesium and other phosphates. Because phosphorus plays an important role in supplying nutrients to the environment, it is central to all forms of lif...
Conference Paper
Full-text available
The chemical composition of lignite from the Vale deposit has been studied. The structura of the mineral is determined by infrared spectroscopy. The effect of a new effective substrate prepared on the basis of brown coal on the biometric parameters of wheat, beans and barley was tested under laboratory conditions. The results show that soil enrichm...
Conference Paper
Full-text available
Phosphate-containing zeolite nanomaterials were prepared by two different methods. The first method consists in introducing mono-, di-, and trisubstituted sodium phosphates into the zeolite structure at the nano level under boiling conditions on a sand bath, while in the second case this process is carried out by melting method. The structures of t...
Conference Paper
Full-text available
Wastewater and natural waters contain various pollutants of both natural and artificial origin. Treatment of these waters is carried out comprehensively by various methods, which significantly increases costs. Currently, the problem of a large amount of drugs entering the wastewater is very relevant. Drugs, unchanged or in the form of metabolites e...
Conference Paper
Full-text available
The present work is the first case where the adsorptive removal of the most commonly used fluoroquinolone antibiotic - levofloxacin (>80 % unmetabolized in the urine) from aqueous solutions as a model of wastewaters by natural zeolite – clinoptilolite from the local region, Georgia and its acid-modified forms has been investigated under static and...
Article
Full-text available
The cement manufacturing process produces gases such as CO2 or SOx and NOx. The increasingly stringent emission limits and the need to reduce emissions are leading cement plants to use best available technologies (BAT) in the manufacturing process. So far, capital-intensive and complex technologies for the capture, transport to storage and use of C...
Conference Paper
Full-text available
Antibiotics are considered to be anthropogenic environmental pollutants and represent a serious danger to humans and living organisms. A special problem is the presence of antibiotics and their metabolites in water. Zeolites - nanoporous materials possess a unique spectrum of physicochemical, adsorption and ion exchange properties, due to which the...
Conference Paper
Full-text available
In order to regulate the nutrition regime the plants should be provided with nutrition elements in every phase of its growth and development. In order to limit the negative effects of nitrogen fertilizers, as well as to minimize the loss of nitrogen fertilizers and to increase the nitrogen uptake coefficient in the plant as well as the use of phosp...
Conference Paper
Full-text available
Pollution of aquatic ecosystems poses a threat not only to the environment, but also to the life of humans and all living organisms. One of the promising direction in this area is the introduction of highly effective methods of natural and waste water purification at existing industrial enterprises, as well as the search for new granular filter mat...
Article
Full-text available
Antibiotics residues are considered to be anthropogenic environmental pollutants and represent a serious danger to living organisms. Antibiotics residues in the environment, even in very small trace level amounts, cause resistance in bacterial populations, which inevitably reduce their therapeutic effectiveness against infectious diseases. Nowadays...
Article
Full-text available
The present research concerns the possibility of adsorptive removal of the frequently used antibiotics – moxifloxacin and norfloxacin on natural zeolites – mordenite and its acid-modified form from aqueous solutions. The adsorption of the above-mentioned antibiotics on the selected natural zeolite samples was investigated under static and dynamic c...
Article
Full-text available
The paper presents research materials on some hydrogen-containing volcanic glasses of Transcaucasia of acidic composition, concentrated in areas of late Tertiary-Quaternary volcanism, in particular, the central part of the Akhalkalaki plateau, within the Akhaltsikhe valley (Georgia). Studies of natural materials of perlite, obsidian and pechstein w...
Conference Paper
Full-text available
Along with obsidian and pechstein (pitchstone), perlites are acid volcanic glasses. They are formed on the edge of molten magmatic lava as a result of rapid cooling, when in contact with the ground and differ from each other mainly by the water content in the texture. Perlite mainly consists of Si, Al, Fe, Ti, Mg, Mn, Ca, Na, K elements oxides. It...
Article
Full-text available
The paper presents results of the combined use of environmentally friendly methods in order to increase the quantity and quality of a wheat harvest by intensifying the biological processes occurring in the seed with the use pre-seeding irradiation with a low-frequency acoustic range electromagnetic field (EMFAR) and with addition of natural zeolite...
Conference Paper
Full-text available
The article investigates the method of adsorption purification from aqueous solutions of the antibiotic moxifloxacin on natural zeolite and its modified form (clinoptilolite). A validated liquid chromatography method was also used, including uncertainty assessment to determine the ability of the zeolite samples to adsorb to antibiotics. Based on th...
Article
Full-text available
The fluoroquinolone antibiotics have been widely used in human and animal medicine. Residual antibiotics pollution has become one of the most serious environmental and human health problems today. Therefore, it has been a great exigency to develop some efficient and cost-effective treatment methods and technologies for antibiotics removal from indu...
Conference Paper
Full-text available
The possibility of using the natural clinoptilolite of the Georgian Zemo Hadaki deposit in the process of adsorption of waste gases from clinker kilns of cement production was studied.
Article
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Residual antibiotics pollution has become one of the most severe environmental problems today. Antibiotics from hospitals and drug factories represent a potential risk for human and ecological health. Therefore, it has been a high exigency to develop some efficient and cost-effective treatment methods and technologies for antibiotics removal from i...
Conference Paper
Full-text available
Development and validation HPLC methods for determination of some antibiotics in support of their adsorption study on natural zeolite R esidual antibiotics pollution has become one of the most serious environmental and human health problems today. Therefore, it has been a great exigency to develop some efficient and cost-effective treatment methods...
Poster
Full-text available
Residual antibiotics pollution has become one of the most serious environmental and human health problems today. Therefore, it has been a great exigency to develop some efficient and cost-effective treatment methods and technologies for antibiotics removal from industrial and household contaminated water. There is the most used technique - adsorpti...
Poster
Full-text available
Pollution of aquatic ecosystems is a threat not only to the aquatic environment, but also to the vital activity of humans and all living organisms. A special place in this series is occupied by pharmaceuticals. Dehydrated zeolite is a microcrystalline “sponge” in which the pore volume is up to 50% of the volume of the zeolite framework. Such a stru...
Article
Full-text available
The equilibrium of ion exchange of Na+ by Li+, K+, Ca++ and K+ by Ca++ on the zeolite NaA have been studied and the proportionality coefficients are determined. When using them in a single operation, we have obtained the examples of partially substituted ion exchange forms in relation to cations that are in the walk-through window area. Lattice par...
Conference Paper
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Possibility of application of some new modified zeolite materials in maxillofacial surgery is considered.
Article
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The paper presents materials on the study of the effect of the complex fertilizer (zeolite + brown coal) on the development of a test plant (barley). The aim of the work was to study the possibility of improving the agrochemical and biological properties of the soil under the influence of complex fertilizer, the assessment of expediency and its lon...
Article
Full-text available
The objective of the present study was to develop sequential extraction procedures for the anthocyanins obtained from agro-industrial waste material-grape skin using ultrasound-assisted, magnetic stirring and supercritical fluid extraction techniques. A rapid and selective high performance liquid chromatographic (HPLC) method for quantitative deter...
Conference Paper
Full-text available
When solving the problem of recultivation of oil polluted soils, it seems more expedient to develop methods for stimulating the activity of native oil-assimilating microflora of polluted soil. This methods do not require laborious, costly operations associated with releasing, cultivation and introduction of a hydrocarbon-oxidizing microorganism cul...
Conference Paper
Full-text available
Nowadays, nanomaterials and nanotechnologies are used practically in all fields of agriculture: crop production, animal husbandry, poultry farming etc. The use of nano-products in crop production as micro-fertilizers provides an increase of productivity (on average 1.5-2 times) for almost all food cultures [1]. Zeolites are nanoporous crystalline s...
Article
Full-text available
Pollution of the soil by petrol is accompanied with a strong negative effect on plants due to changes in its physical-chemical properties, mainly due to an increase in hydrophobicity and the filling of soil capillaries with petrol and the direct toxic effect of petroleum hydrocarbons (phyto toxicity). Zeolite (clinoptilolite), is an ecologically sa...
Article
Full-text available
The industry faces the actual task of cleaning the waste gases from the kilns of cement production. Among the different methods of purification of gas systems adsorption methods acquire special importance, only adsorbents can provide almost complete capture of several components at once. The existing range of adsorbents allows to solve up to 75% of...
Article
Full-text available
Economical effective complex fertilizers used for improving soil fertility can be produced in countries with suitable agricultural resources. The results of tests that were held on organo-mineral fertilizer, which consists of natural zeolite and brown coal of the Georgian origin are discussed in the article. The results obtained make it possible to...
Article
Full-text available
Georgia started to use alternative raw materials for producing cement not only because of the suspension of the importation of mineral raw materials from other countries, the lack of local deposits and high prices but also in order to reduce the emission of harmful gases, such as C02, SOx, NOx, into the atmosphere. This is instead of using unregula...
Conference Paper
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С каждым годом все больше внимания уделяется проблемам, связанным с загрязнением окружающей среды. Загрязнение нефтью и нефтепродуктами приводит к значительным изменениям физико-химических свойств почв и загрязняет подземные воды. В результате этого плодородный слой Земли в течение длительного времени не восстанавливается. Все больше сельхозпроизв...
Article
Full-text available
The paper discuses positive effect are of the utilization of non-traditional natural resources, the so-called agronomical ares, i.e. mineral fertilizers, in order to increase the productivity of crops and improve the physical and chemical properties of the soil. The effectiveness of such fertilizers is their complex positive influence on the proper...
Conference Paper
Full-text available
The paper discuses positive effect are of the utilization of non-traditional natural resources, the so-called agronomical ores, i.e. mineral fertilizers, in order to increase the productivity of crops and improve the physical and chemical properties of the soil. The effectiveness of such fertilizers is their complex positive influence on the proper...
Conference Paper
Full-text available
The possibility of using the natural clinoptilolite of the Georgian Zemo Handaki deposit in the process of adsorption of waste gases from clinker kilns of cement production was studied. KEY WORDS: zeolite, adsorbent, exit gas, selectivity, cement clinker.
Article
Full-text available
New nanotechnological method is proposed to reduce the negative effects of nitrogenous fertilizers and their losses, which involves introduction of nitrogen-containing substance into the structure of natural zeolite. The obtained nanomaterials can be used as a nitrogen fertilizer, which allows the gradual transfer of nitrates into the soil and mini...
Conference Paper
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II Всероссийской научной конференции (с международным участием)
Conference Paper
Full-text available
Высокие сорбционные свойства некоторых природных цеолитов по парам воды, позволяют их использовать в качестве высокоэффективных осушителей жидких и газообразных систем. Для адсорбционной ёмкости большое значение имеет структура пор, из которых складывается общий адсорбционный объём цеолитов, а также их доступность для адсорбатов. Осушка при помощи...
Conference Paper
Full-text available
Цеолиты относятся к группе катионобменников и их насыщение катионами аммония, калия, кальция, магния, цинка и др. элементами не представляет особого труда, чего нельзя сказать в отношении фосфора, который в соответствующих солях находится в составе анионного кислотного остатка. В представленной работе был приготовлен клиноптилолит, обогащённый фосф...
Conference Paper
Full-text available
Zeolites are aluminosilicates, their physical-chemical properties of these minerals include molecular sieve effect, adsorption and ion exchange ability, as well as interaction with macromolecules and supramolecular structures that enables their application as adsorbents, ion-exchangers and catalysts in industry, in the environment protection, in ag...
Conference Paper
Full-text available
В связи с интенсивным развитием промышленного производства цемента в атмосферу выбрасывается большое количество различных кислых веществ: оксидов серы, сероводорода и других сернистых газов, оксидов азота и т.д. Перед промышленностью стоит задача утилизации кислых газов, которая должна решаться с точки зрения защиты окружающей среды, а также с точк...
Conference Paper
Full-text available
The world practice for recultivation work possesses the various methods of restoration of soil and water ecosystems. Pollution by oil and oil products leads to the significant changes in the physico-chemical properties of soil and destroys the water-air mode. More and more farmers are turning to the use of non-traditional mineral-raw material resou...
Poster
Full-text available
The effective way to achieve the nutrition regime of plants is to use mineral and organic fertilizers. Their effectiveness is quiet low: after introduction in the soil part of nitrogen fertilizers goes washed, and part of phosphoric fertilizers is easily eliminated by the soil which turns it into insoluble iron or aluminum phosphorus salts. That’s...
Conference Paper
Full-text available
Цеолиты, по сравнению со многими другими осушающими средствами, имеют ряд преимуществ: они характеризуются чётко выраженной гидрофильностью и селективностью к определённым соединениям, обладают молекулярно-ситовыми свойствами, легко регенерируются при нагревании (могут быть использованы многократно). Адсорбционная осушка широко применяется для очис...
Article
Full-text available
On the basis of relevant research works, the paper discuses positive effect of the utilization of non-traditional natural resources, the so-called agronomical ores, i.e. mineral fertilizers, in order to increase the productivity of crops and improve the physical and chemical properties of the soil. The effectiveness of such fertilizers is their com...
Article
Full-text available
Natural zeolites of sedimentary origin are widely used in agriculture both as separate fertilizer and a mix of mineral and organic fertilizers. Natural zeolites are crystalline nanoporous hydrated aluminosilicates. Fertilizer of prolonged activity enriched with macro- and microelements is obtained by fusing zeolite with dehydrated ammonium using na...
Conference Paper
Full-text available
The present research has been shown the possibility of use of Georgian natural zeolites – mordenite and clinoptilolite modified H-forms for removal of nine volatile N-nitrosamines (VNA) and two tobacco-specific N-nitrosamines (TSNA) from tobacco mainstream smoke. Previously, adsorption properties of the above-mentioned zeolites modified H-forms wer...
Poster
Full-text available
The present research has been shown the possibility of use of Georgian natural zeolites – mordenite and clinoptilolite modified H-forms for removal of nine volatile N-nitrosamines (VNA) and two tobacco-specific N-nitrosamines (TSNA) from tobacco mainstream smoke. Previously, adsorption properties of the above-mentioned zeolites modified H-forms wer...
Book
Full-text available
Desiccation or deep dehydration of liquid organic media is of great importance for modern chemical, gas and oil-refining industry. The moisture content in organic liquids decreases the operating ability and reactivity of the product. Furthermore, moisture is released on the walls of pipelines and vessels when organic liquids are supercooled that ca...
Article
Full-text available
The aim of this work was the quantitative estimation of some volatile N-nitrosamines in tobacco smoke of local cigarette different brands using an efficient, rapid and sensitive GC-MS method. The chromatographic system suitability was tested by using the following characteristics. The RSD, % of peak areas (five replicate injections) was < 2.0 %; Th...
Poster
Full-text available
Abstract: An ecological situation is one of the most important factors in the world that determines health of the nation. A wide application of economically suitable environmental technologies is necessary to solve the problems existing in Georgia, problems such as, detoxication of soil, restoration of natural earth covering and productivity. One o...
Conference Paper
Full-text available
The results show that the ability to adsorb the modified H-form of mordenite is better than the H-form of clinoptilolite, in particular, the H-form of mordenite reduces the content of N-nitrosamine in tobacco emissions by 74%, and the H-form of clinoptilolite by 63%.
Conference Paper
Full-text available
В данной работе рассматривается возможность использования водородной формы природного цеолита – морденита, для удаления из табачного дыма летучих, канцерогенных веществ - N-нитрозоаминов. Была разработана и валидирована методика количественного определения N-нитрозоаминов в табачном дыме хромато-масспектрометрическим методом. Для изучения поглотите...
Article
Full-text available
In the laboratory conditions, influence of the substrate based on brown coal and natural zeolite (clinoptilolite) on the biometric parameters of bean and barley germination has been investigated. In the first version the soil (object of comparison) was used as the standard. In the second version the substrate was produced by mixing 50% of finely-gr...
Conference Paper
Full-text available
The basic ambient air pollutant in Georgia is motor transport and the fraction of transport emission makes 71%; that for energy sector 25% and for industrial sector 4%. To solve this problem, sorptive properties of natural zeolites of Georgian origin (analcime, clinoptilolite, mordenite, philliosite) and their modified forms were studied by gas chr...
Conference Paper
Full-text available
In order to find out the basic sources of ambient air pollution in Georgia and determine the spectrum of the harmful substances, various sectors of the country’s economics have been studied and the portions from their emission have been established. To calculate the individual and total quantities of emissions of «the basic pollutants» from the var...
Article
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The review paper is devoted to the analysis of work performed in the republics of the former Soviet Union, to identify the use of such mineral additives to animal feed, as natural zeolites. Despite the mixed results of several studies, as a whole, this supplement has a positive effect on the development and growth of poultry, in particular, on the...
Article
Full-text available
In order to achieve a planned objective, the following aspects are considered in the work: the basic sources of ambient air pollution in Georgia; dynamics of the emissions of harmful substances in the air from various economic sectors; ambient air quality monitoring system in Georgia; qualitative condition of ambient air of Georgia; characteristic...
Article
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Zeolites are fine-porous sorbents widely used in the practice of gas chromatography for the separation of gas systems and mixtures of volatile organic compounds. However, capabilities of zeolites are limited because of small-sized "entrance apertures" (about 0,9 nm) that limitate of their application in the analysis of the organic compounds with si...
Poster
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Currently, hothouse soils (substrates) consisting of different components are widely used in practice of plant growing for various agricultural crops [1, 2]. Number of components contained in the substrate nainly does not exceed four. Substrates can be conventionally divided into two groups: soil-containing and soil not containing; the priority is...
Conference Paper
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Кислотные модифицирование природных цеолитов предполагает образование цеолитоподобных наномаериалов для получения новых сорбентов для ГХ