Katerina Atkovska

Katerina Atkovska
Saints Cyril and Methodius University of Skopje · Faculty of Technology and Metallurgy

PhD

About

32
Publications
17,958
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197
Citations

Publications

Publications (32)
Article
Full-text available
Over recent years, the food industry has striven to reduce waste, mostly because of rising awareness of the detrimental environmental impacts of food waste. While the edible oils market is enlarging constantly, there is increasing interest in producing plant-based oils because of the presence of various bioactive components like mono and poly unsat...
Conference Paper
Stabilized activated sludge was used as a low-cost and efficient biosorbent for removing Cu(II) ions from an aqueous solution. The effects of contact time and initial Cu(II) concentration on adsorption efficiency were investigated. Response surface methodology (RSM) was employed to develop a predictive mathematical model and optimize the adsorption...
Article
Full-text available
The aim of this paper is to investigate the potential of modified fly ash (FA) as an adsorbent for the removal of heavy metal ions from polluted waters. The effectiveness of unmodified FA was compared to FA modified with chitosan. The FA and FA/chitosan particles were characterized by means of SEM, XRF and FTIR methods. The FA and FA/chitosan compo...
Article
Full-text available
Acetaminophen is widely used for musculoskeletal pain management, generally for arthritis, in elderly people and for reduction of fever in colds, flu and infections. Using the acetone/liquid paraffin solvent system, cellulose-based-microparticles were prepared by the emulsion solvent evaporation technique. The aim of this work was to evaluate the i...
Article
The increase of the population and the industrial development, lead to enormous environmental pollution. Various types of waste containing heavy metals are produced and discharged into water resources. Heavy metals are considered to be the main source of contamination that causes serious environmental problems. The polluted water becomes unusable a...
Chapter
In this chapter some of the published research data as well as some of our research activities and results were reviewed concerning the application of carbon-based nanostructures (CNSs) - carbon nanotubes (CNTs) and graphene) and TiO2 based nanomaterials in nanoremediation, where CNSs were applied as nanosorbents for removing heavy metal ions from...
Article
Full-text available
In this research, a comparison of some physical properties of two natural media was made, namely, a selected soil sample from the northwestern segment of the Skopje valley and a sample of river sediment from the river Vardar. The primary parameters of the samples are determined, such as: granulometric composition, specific mass and volume mass in d...
Chapter
This paper compares the percentage of removal of Cr(VI) ions from aqueous solutions with pure diatomite and clayey diatomite. To characterize the adsorbents, the following analyses were performed: classical silicate chemical, differential thermal and thermogravimetric, X-ray dispersive, Fourier transform infrared, scanning electron microscopy, and...
Article
In the last decade the application of membrane separation technology is more increasing. The membrane in water purification and wastewater treatment is essential separation process used for water reclamation. The production of new membrane types with different permeable characteristics and performances allows them to be fitted in different membrane...
Chapter
The clayey diatomite from the village of Suvodol (Bitola region) used in this research has shown to be a very effective and efficient natural material for the removal of Cr(VI) ions from aqueous solutions. The adsorption of Cr(VI) ions onto a clayey diatomite was shown to occur very efficiently with 96.7%. During the experiments the effect of opera...
Article
Full-text available
The mosquitoes are a serious threat to public health, since they are known vectors of many life-threatening diseases. Mosquito-borne diseases cause millions of deaths worldwide every year. While mosquitoes are important to maintain ecosystems, the aim is to keep them out of our personal space. People looking for alternatives to synthetic mosquito r...
Article
Zeolites are nano-porous crystalline aluminosilicates. Natural zeolites are non-toxic and safe for humans which expand their application in different fields. Clinoptilolite is the most abundant natural zeolite with high purity that occurs in many parts of the world. It has a frame structure in which the tetrahedra of silicon [SiO4/2] and aluminium...
Article
Within this paper, investigations were carried out in order to obtain data for determining the maximum absorption capacity and the conditions in which the balance in the systems occurs: Mn2+ ions - expanded perlite and Mn2 + ions - carbonized sunflower husks. A series of tests were performed using model solutions of Mn2+ ions with different concent...
Article
In this article the possibility of removal of Mn (II)-ions from aqueous solutions with the use of grape branches as an adsorbent was investigated. For the realization of the set goal during the experimental investigations, the influence of the following operating parameters was examined: the initial concentration of Mn (II) ions in the solution (10...
Article
The presence of some chemical compounds at higher levels than maximum permissible concentrations (MPC) in the drinking water, suggests of water resources pollution. In this paper the following elements were analyzed: total arsenic, cadmium, lead, cooper and zinc. Twelve samples of water from the water supply system from the city of Skopje were exam...
Article
Full-text available
The results of the water retention curves between (pF-2 and-4.2) matric potential for two substrates perlite and peat, are presented in this paper. Perlite is an inorganic, expanded aluminosilicate of volcanic origin. Peat is an organic substrate. For assessing this parameter, the method of bar extractors and Porous plate extractors have been explo...
Article
Full-text available
Wastewater that contains heavy metal ions is considered as the serious threat for environmental pollution. Most of the heavy metals are toxic and their ions are not biodegradable with the tendency to accumulate in the soil and in the living organisms, and hence they are significant environmental pollutants. Therefore, the treatment of the heavy met...
Article
The toxicity and non-biodegradation of heavy metals, as well as their tendency to accumulate in the soils, water resources and the living organisms, makes them the significant environmental pollutants. Therefore, the reduction and elimination of heavy metal ions from aqueous systems is very important from the ecological, nutritional and environment...
Article
Full-text available
Removing hexavalent chromium from contaminated wastewater is very important because of toxicity to living organisms. Chromium is carcinogenic and mutagenic in very low concentration values (sub-ppm). The ability of the natural mineral (bentonite) for adsorption of hexavalent chromium, Cr(VI), from aqueous solutions was investigated. The influence o...
Article
Full-text available
Natural minerals from different localities in the Republic of Macedonia are selected for elimination of Cr(VI) ions from water resources. For that aim are selected: aksil (Kriva Palanka), trepel (Bitola), SiO2 amorphous (Kozuf), pemza (Bojanciste). In this study, their adsorption capacity is analyzed using spectrophotometric method (UV/VIS Spectrop...
Conference Paper
Full-text available
The heavy metals pollution is a serious environmental problem, especially the presence of the hexavalent chromium ions in the water resources. The removal of Cr(VI) from wastewaters is a necessity especially because of its toxicity for the living beeings and the environment. Among viable options, natural inorganic materials are considered as possib...
Article
Full-text available
The novel trends in green separation processes impose the need for application of natural, low-cast and high-efficiency selective adsorbents, such as natural zeolite, within the processes for the treatment of drinking water supplies. Lately, nano-porous inorganic sorbents represent an ongoing trend for elimination of heavy metals from water resourc...
Article
Full-text available
White opalized tuff (from the Strmoš locality, Probištip), as a raw silicate amorphous material, contains some quantity of admixtures. The total quantity of admixtures amounts is about 8% mass. Мine powdery ingredients are homogeneously distributed into the basic silicate mass. Carbonate material is a significant part of present admixtures, and it...
Conference Paper
Full-text available
Heavy metal pollution is a serious problem for the environment, and therefore it is very important to enable cost-effective heavy metal ions removal from the contaminated water. Among viable options, natural inorganic materials are considered as possible sorbents for the heavy metal ions elimination. The aim of this work is to investigate the adsor...
Article
Full-text available
Due to its typical layered silicate structure, large specific surface area, chemical and mechanical stability, high cation exchange capacity, bentonite has been widely used as heavy metals adsorbent from aqueous solutions. This paper reports data referring to the adsorptive properties of natural bentonite from Kriva Palanka, Republic of Macedonia,...
Conference Paper
Full-text available
Due to its typical layered silicate structure, large specific surface area, chemical and mechanical stability, high cation exchange capacity, bentonite has been widely applied as heavy metals adsorbent from aqueous solutions. In this paper the adsorptive properties of natural bentonite from Kriva Palanka, Republic of Macedonia, for the removal of F...

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