Luba Eprikashvili

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

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...

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...

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...

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...

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...

Zeolites belong to the group of cation exchangers, so enriching them with potassium, ammonium or other cations is not difficult. This process is complicated by the presence of anions present in the corresponding compounds as anionic acid salts.When making anionic forms, zeolites should show high resemblance to ionic compounds. With such as salts, t...

Zeolites belong to the group of cation exchangers, so enriching them with potassium, ammonium or other cations is not difficult. This process is complicated by the presence of anions present in the corresponding compounds as anionic acid salts.When making anionic forms, zeolites should show high resemblance to ionic compounds. With such as salts, t...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

Possibility of application of some new modified zeolite materials in maxillofacial surgery is considered.

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...

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...

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...

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...

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...

The objective of the present study was to develop sequential extraction procedures for the major carotenoids - beta-carotene and lycopene from agro-industrial waste materials - tomato skin, tangerine and orange peels using the ultrasound-assisted extraction and the supercritical fluid extraction techniques. A rapid, effective and selective high per...

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...

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...

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...

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.

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...

II Всероссийской научной конференции (с международным участием)

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...

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...

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...

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...

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...

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...

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...

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...

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...

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%.

Природные цеолиты представляют собой нанопористые кристалличекие гидратированные алюмосиликаты, тетраэдры, которых составляют длинные цепочки. Структура их кристаллической решётки содержит пустоты, которые заняты свободно движущимися ионами и молекуламы воды. В отличие от синтетических цеолитов, природные цеолиты характеризуются вторичной пористост...

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...

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...

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...

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...

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...

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...

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...

Some aspects of transition from chemical to biological agronomy are discussed in the article. Attention is focused on the questions of use of natural zeolites of sedimentary origin in practice of plant growing. On the basis of the researches carried out at the end of the 20 th and at the beginning of the 21 st centuries, positive influences of the...

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...

Кислотные модифицирование природных цеолитов предполагает образование цеолитоподобных наномаериалов для получения новых сорбентов для ГХ

On the basis of brown coal and natural zeolite (heulandite-clinoptilolite containing tuff) modified by ammonium and potassium cations a substrate has been developed; the bioproduction of plants grown on this substrate is 2.9 times higher than that grown on soil. This substrate is characterized by long continuous utilization in plant growing.

The present work deals with the study on the distribution of contribution of adsorption and dissolution to retention volume of individual components in gas-liquid chromatography as dependent on the amount of liquid crystal stationary phase deposited on solid support and on the chromatographic column temperature.

The paper is of a review character. Analyzing numerous examples of a succesiful application of zeolite containing substrates for agricultural crops growing the authors advance and develop a series of theses indicating great perspective of this direction in agronomy.

This paper discusses the questions of biological influence of natural zeolites - clinoptilolite-contain- ing tuffs and peaty-zeolitic and organo-zeolitic fertilizers prepared on their basis, on the qualitative and quantitative composition of soil microorganisms. It is shown that their influence causes the reproduction of useful microflora, in parti...

A selective adsorbent was proposed on the basis of synthetic zeolite silikalit-2 modified with cadmium, tallium, and silver cations. It is intended for the gas chromatographic separation of some isomeric benzene derivatives. The adsorbent possesses pronounced retention properties to para isomers of aromatic compounds, which is due to the molecular...

The results of investigation of the effect of vapor of organic substances of homologous row C6-C9 in the content of carrier gas on the process of elution of compounds in gas-liquid chromatography are presented.

In this work the influence of some complex-forming compounds with cobalt and nickel cations dissolved in stationary liquid phase on its chromatographic characteristics is studed. The separation properties of stationary liquid phase PEG-1000 on the example of model systems of C2-C5 monohydrate alcohols and some aromatics and heterocycle combination...