E. Chmielewská

E. Chmielewská
Comenius University Bratislava · Faculty of Natural Sciences, Department of Environmental Ecology

BSc.MS. PhD

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89
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Publications

Publications (89)
Article
Aqueous pollutants of cesium, iodide, lead, zinc and chromate ions adsorbed on natural and Ag+(Pb2+) – or NH4+- exchanged clinoptilolite together with surfactant hydrophobized, Ca-alginate pelletized as well as MnOx – and FeO(OH) – clinoptilolites compared with the inland montmorillonite were assessed. The investigations of zeolites (clinoptilolite...
Article
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A cost-effective, iron- and manganese-oxide-supported clinoptilolite-based rock was prepared. Based on its nanoporous structure, it worked as a nanoreactor, thereby providing enhanced functionalities. The mono- and bimetallic Fe- and Mn-oxide-supported clinoptilolite was thoroughly characterized with thermoanalytical FT-IR, XRD, SEM, and XPS spectr...
Article
The recently synthesized mono- and bimetallic Fe and Mn oxides supported zeolite of clinoptilolite type, characterized with FT-IR, XRD, SEM–EDS and XPS spectroscopy, confirmed the occurrence of a new MnO2 phase (pyrolusite, birnessite) including mostly amorphous iron oxi(hydr)oxide FeO(OH) species on the surface. The product validated a much higher...
Conference Paper
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Nanoengineered materials, such as nanoadsorbents, nanometals, nanomembranes, and photocatalysts, offer the potential for novel water technologies that can be easily adapted to customer-specific applications. Moreover, nanomaterials enable higher process efficiency due to their unique characteristics, such as a high reaction rate, surface area, etc....
Article
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The occurrence of inorganic pollutants especially heavy metals in aquatic environment has been a worldwide issue, and there is a need to develop methods for its removal from polluted water. The present study is devoted to the development of novel adsorbents based on zeolite materials for removal of zinc cations by modifying raw materials with iron...
Article
Environmental requirements are becoming of great importance in today´s society since there is an increased interest in the industrial use of renewable resources. For this reason, the objective of the work presented was to examine and compare several natural, commercial or even waste products in diclofenac uptake, using synthetic water solutions in...
Article
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Environmental requirements are becoming of great importance in today´s society, since there is an increased interest in the industrial use of renewable resources.
Chapter
Research interests for the designing of alternative adsorbents to replace costly commercial grade activated carbon and synthetic ion exchange resins, which are derived from petroleum-based raw materials using the not environmentally friendly processing chemistry, have intensified in recent years. Attention has been focused on the various adsorbents...
Conference Paper
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VOD Na zmiernenie bolesti a zápalu, najmä pri ochoreniach, ako napr. artritíde, sa najčastejšie používajú nesteroidne analgetika a antiflogistika, ktoré sa rozdeľujú podľa chemickej štruktúry, pričom vhodnejšie by bolo ich delenie podľa miery inhibície prozápalového enzýmu cyklooxygenázy. Klinicky veľmi významným analgetikom a antiflogistikom je di...
Article
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Biomimetics (or bioinspiration) is one of the most revolutionary scientific fields of the 21st century. It is usually defined as a science which imitates nature and living systems, and helps to sustain life on Earth. Due to a better understanding of biological systems, the ability to observe nature, as well as the number of effective natureinspired...
Article
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The topic of this paper is to review some results of laboratory examinations of mostly volcanic aluminosilicates (clinoptilolite-rich tuffs, tephra, stilbite, alginite, montmorillonite, perlite product vapex) deposited in Slovak and some Chinese repositories, which were achieved during scientific cooperation. The overview is limited and highlights...
Article
Full-text available
In this review attention is focused on the various traditional and ecofriendly adsorbents, including a few of the local repositories which have proven enhanced performance for environmental pollutants removal. Due to their low cost and local availability, natural materials such as zeolite, montmorillonite-rich bentonite, industrial waste product ch...
Article
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Commercial Fe-oxihydroxide (GEH) and clinoptilolite-rich tuff proved to have a quite low aluminum uptake in current research, however montmorillonite-rich bentonite’s maximum capacity towards aluminum was approximately 4-times higher. Also, the best chromate adsorption was observed on montmorillonite-rich bentonite. Concerning halides uptake on oct...
Article
Full-text available
In this paper, the attention was focused on the phosphate removal using the various, mostly traditional or naturally available adsorbents, few of the local repositories, which prove enhanced performance for phosphate removal. The highest capacity toward phosphate ions showed montmorillonite and Fe-oxihydroxide (GEH), while the uptake capacity of sl...
Article
Full-text available
In this paper the attention was focused on the phosphate removal using the various, mostly traditional or naturally available adsorbents, few of the local repositories, which prove enhanced performance for phosphate removal. The highest capacity towards phosphate ions showed montmorillonite and Fe-oxihydroxide (GEH), while the uptake capacity of sl...
Book
Full-text available
This review highlights the characteristic features of adsorption and ion exchange onto natural zeolite (clinoptilolite) for environmental cleanup processes, especially for water purification, zeolite´s past, present and future, with an emphasis on the recent developments in this field, particularly in the synthesis and manufacturing of the advanced...
Article
Full-text available
In this review paper some attention is focused on the various traditional and ecofriendly adsorbents, a few of the local repositories which prove enhanced performance for environmental pollutants removal. Due to their low cost and local availability, natural materials such as zeolite, montmorillonite-rich bentonite, industrial waste product chezaca...
Article
Full-text available
The review focuses on the adsorption and selectivity properties of the inland natural zeolites clinoptilolite and mordenite towards a broad spectrum of environmental pollutants incl. radioactive and compare some of them partially to selected foreign samples. A series of elution experiments into a broad spectrum of individual isomolar metal solution...
Article
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The objective of this study was to determine the feasibility at the laboratory, and to evaluate the pilot potential in the field operation for ammonium removal out of the drinking water with enhanced ammonium concentration by applying Slovakian clinoptilolite-rich tuff deposited at the Eastern Slovakian municipality Nižný Hrabovec. Detailed technol...
Article
Full-text available
Adsorption was measured and compared for the uptake of zinc, iron, lead, copper and ammonium onto clinoptilolite- and mordenite-rich tuffs of Slovakian and Chinese origin for both the natural and near homoionic Na form as well, using the radioanalytical and spectrometric determination. The higher quality of Slovakian clinoptilolite-rich tuff has be...
Article
Full-text available
Batch adsorption experiments were carried out to study the kinetics and thermodynamics of phosphate removal from model solutions on the surfaces of some selected adsorbents. The data obtained were analyzed using two reaction-based kinetic models and a diffusion-based model. In order to examine the extent to which diffusion participates in this adso...
Article
Full-text available
The topic of this paper is to review some results of laboratory and field applications of clinoptilolite-rich tuff, deposited at the Slovakian repository, which have been achieved in the last 25 years. Since this research is extended, the overview is limited and highlighting only those results, which concern the surface treated, and thus, the broad...
Article
Full-text available
Batch adsorption experiments were carried out to study the kinetics and thermodynamics of phosphate removal from model solutions on the surface of some selected adsorbents. The data obtained were analysed using two reaction-based kinetic models and a diffusion-based model. In order to examine the extent to which diffusion participates in this adsor...
Article
Full-text available
Tephra is a fragmental material produced by volcanic eruption. Here, volcanic tephra deposit from the northeast of China was used for our study. Samples of unaltered tephra are usually composed of feldspar, glass, pyroxene, and olivine. Moreover, these volcanic alteration products also contain Fe oxides, phylosilicates, sulfates, and amorphous Al-S...
Article
Full-text available
Ion exchange isotherms have been measured and plotted for the uptake of cesium, barium, cobalt, zinc, silver and amonium onto clinoptilolite- and mordenite-rich tuffs of Slovakian origin selectively for both the natural and near homoionic Na form as well, using the radioanalytical determination. The higher quality clinoptilolite-rich tuff has been...
Article
Full-text available
The objective of this paper is to review some of the practical applications of clinoptilolite-rich tuff, deposited at the Eastern Slovakian repository Nižný Hrabovec, which has been used for inland water treatment and purification processes in the last 25 years. Since this field is wide, this overview is limited and highlighting only those water pu...
Article
Full-text available
This review article highlights the characteristic features of adsorption and ion exchange materials for environmental cleanup processes, especially for water purification, with an emphasis on the recent developments in this field, particularly in synthesis and manufacturing of the advanced cost-effective organic-inorganic (hybridized) zeolite-based...
Article
Full-text available
Removal of nitrates, sulfate and Zn(II) ions from aqueous solutions through adsorption onto biopolymeric alginate/clinoptilolite-rich tuff pellets was studied by using an equilibrium batch technique. The idea of this approach of biosorbent fabrication is to promote the native zeolite adsorption performance and thus to prepare more efficient amphote...
Article
Full-text available
Natural zeolites are very popular in environment remediation due to their abundance and cost effectiveness. Their large surface area offers surface modification to improve their adsorption properties. The aim of the study is to develop combined adsorbents based on zeolites and alginates for removal of oxyanions from water. The combined adsorbents w...
Article
Full-text available
Removal of nitrates, sulfate and Zn(II) ions from aqueous solutions through adsorption on to biopolymeric alginate/ clinoptilolite rich tuff pellets was studied using equilibrium batch technique. The idea of this approach of biosorbent fabrication is to promote the native zeolite adsorption performance and thus to prepare more efficient amphoteric...
Article
Full-text available
The biopolymers represent an interesting and attractive alternative as adsorbents because of theirparticular structure, physico-chemical characteristics, chemical stability, high reactivity andexcellent selectivity towards a broad variety of environmental pollutants resulting from thepresence of functional groups (hydroxyl-, acetamido- or amino-) i...
Article
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The nanotechnology resolution affects many areas of science including chemistry and chemical engineering since 1970, when enormous advances in the synthesis, characteri-zation and clarifying of high surface area materials have taken place. Development and commercial use of methods like sol-gel synthesis, chemical vapor deposition or laser induced s...
Article
Safe trapping of cesium was investigated by heat-treating at various temperatures a Slovakian clinoptilolite-rich tuff sample, previously subjected to exhaustive exchange with Cs+. The influence of temperature on the process effectiveness was studied and the mechanism of Cs+ immobilization explained. Treating the Cs-exchanged material, at 1000°C re...
Article
Full-text available
The main objective of our study was to design and develop the more efficient and cost effective water purification process using the natural clinoptilolite based separation and reaction media. Aquatic pollutants like phenol, azodyes acid red and indigo carmin have been examined for removal using model solutions and surface functionalized clinoptilo...
Article
The study of cations and anions removal and column dynamics was investigated using a clinoptilolite-rich tuff from Turkey (Eskisehir deposit, Central Anatolia) and Slovakia (Ni center dot ny Hrabovec deposit). The Slovak clinoptilolite was modified with octadecylammonium (ODA) surfactant in order to enhance adsorption properties. The surface of zeo...
Article
Full-text available
The development of innovative clean-up technologies remains a challenge as current procedures have many limitations, such as being expensive, concentration or pollutant specific, and many others. Natural zeolite of clinoptilolite type was beneficiated with surfactant octadecylammonium and alginate biopolymers using the sol-gel method. Carbonization...
Article
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Nanocomposites are polymers filled with particles the dimensions of which are in the nanometer range. Numerous approaches have been studied for the development of cost-effective adsorbents containing natural polymers like polysaccharides or their derivatives based on chitin, chitosan, starch and cyclodextrin. The polysaccharide materials are descri...
Article
The paper deals with fabrication of carbonized and hydrophobized clinoptilolite based adsorbents using organic carbon rich substances which were pyrolytic combusted and covered the external zeolite surface. Hydrophobization of the zeolite external surface was accomplished by octadecylammonium surfactant. Both surface modified clinoptilolite dominat...
Article
Full-text available
Two types of zeolite were briefly used to treat wastewater from a refinery i.e. one was natural zeolite of clinoptilolite type received from Slovakia and the other manufactured synthetic zeolite purchased abroad. Pollutants examined in this study for above adsorbent efficiencies were - petroleum hydrocarbons, heavy metals, sulfur and ammonia compou...
Article
Full-text available
A novel carbonized clinoptilolite-rich tuff was studied for phenol removal from water. Zeolite sample carbonization was accomplished in a plasmachemical reactor (pyrolytic chamber) using several types of waste, here specifically waste vegetable residues and starch. Phenol adsorption experiments were performed in the batch system. An industrial acti...
Article
Full-text available
The paper deals with fabrication of carbonized and hydrophobized clinoptilolite-rich tuff using organic carbon rich substances, here particularly starch and waste vegetable residues, which were pyrolytically combusted and covered the external zeolite surface. Hydrophobization of the zeolite external surface was accomplished by octadecylammonium sur...
Article
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Current research efforts focus now-a-day on expanding phytoremediation to address contaminated soils, waters and atmospheric pollutants. Plants that hyperaccumulate normally toxic metals are rare and taxonomically widespread throughout the remote areas. Phyto- (or green plant based) remediation is not a new concept and constructed wetlands, reed be...
Chapter
Batch and column sorption experiments have been performed to study a significantly enhanced removal of toxic oxyanions, i.e. chromate and arsenate from aqueous effluents on inland clinoptilolite modified by the octadecylammonium acetate [ODA]. The arrangements (orientation and length) of the surface-attached organic chains and thus the initial conc...
Article
A novel nanostructure organic-inorganic composite material on the base of clinoptilolite-rich tuff of Slovakian origin has been investigated using SEM, HR TEM and XRD spectral analytical techniques. As organic guest species cationic surfactant, i.e. octadecylammonium, on clinoptilolite matrix was used. As inorganic guest silver arsenate or chromate...
Article
Full-text available
The adsorptive separation of 1, 2-dichloroethane from model wastewater by different Slovak natural and octadecylammonium-modified clinoptilolites has been studied. It was found that the 1, 2-dichloroethane will be adsorbed by natural as well as by surfactant-modified clinoptilolites; all clinoptilolites have a similar adsorption loading. There was...
Article
Full-text available
Natural zeolitic material of the clinoptilolite type from East Slovakian deposit in Nižný Hrabovec was an object of this study. The attention was focused on novel nano-structure inorganic-organic composites prepared on the basis of natural clinoptilolite (CT). Two forms of surfactant-modified clinoptilolite with octadecylammonium acetate were chara...
Article
Full-text available
Using a laboratory set-up, sorption of chromate and arsenate from aqueous solutions with the octadecylammonium acetate (ODA)-modified clinoptilolite was examined. In the experiments, a natural montmorillonite was compared with organically, i.e . surfactant-loaded clinoptilolite and with some inorganically substituted (Ag, Pb)-monoforms. The arrange...
Article
Full-text available
A laboratory setup was used to examine the uptake of chromate and arsenate from aqueous solutions by octadecylammonium acetate [ODA]-modified inland clinoptilolite. In trials, a natural variety of montmorillonite was compared to organic, i.e. surfactant loaded clinoptilolite, and some inorganically substituted (Ag, Pb) monoforms. The arrangement of...
Article
Three atomic spectrometry methods (FAAS, ETAAS, ICP-AES) for the determination of heavy elements (Cd, Cr, Ni, Pb, V) in soils, soil extracts, plants, and biota were evaluated and compared. The precision and accuracy of spectrometric measurements were checked by certified reference materials. The ETAAS is more suitable for the determination of the e...
Article
Far-reaching changes of natural environment have occurred in most of the larger estuaries, recipients and aquatic bodies all over the world for the last century and a few of them can be considered to have retained many traces of their original character. Nowadays about 30% of our planet suffers from desertification. This paper tries to outline some...
Article
The objective of this study was to investigate the effect of atmospheric immissions of both most significant industrial centres of Danube Lowland, Schwechat and Slovnaft refineries on environment. In this connection, the environmental pollution of immission zones with heavy metals should be evaluated on the basis of selected bioindicators (soil, lu...
Article
Physicochemical and mineralogical characteristics of the clinoptilolite tuffs of Chinese, Slovakian and American origin were investigated using various techniques, i.e. X - ray powder diffraction, water vapour desorption, ion exchange and chemical analysis.
Article
This paper presents a short review of zeolite history. The explanation of crystal structures of zeolites, their primary, secondary and tertiary building units are illustrated as well. Description of topology, chemistry and of ion-exchange properties is focused predominantly on clinoptilotile species. Chapters 4, 5 and 6 deal with the principles of...
Article
Full-text available
Green algae, especially Cladophora species, are generally considered as the best bioindicator of aquatic bodies contamination by nutrients as well as by heavy metals. Therefore, the object of this study was to investigate to which extent toxic metals (Ni, V, Cd, Pb, Cr) are present in algal biomass and to establish the bioaccumulation coefficients...
Article
Electrothermal atomic absorption spectrometry (ETAAS) was applied for the determination of chromium, nickel and vanadium in biological materials (earthworms, feather, lucerne). Three different decomposition procedures of biological matrices are presented. The utilization of NH4H2PO4, Mg(NO3)2 and Pd(NO3)2+ Mg(NO3)2 as chemical modifiers are investi...
Article
Basic properties of inland and Chinese zeolites for some ionic species removal from simulated low-activity liquid waste have been studied. Domestic clinoptilolite originates from the industrial deposit Nizny Hrabovec, inland mordenite - from the East Slovakian locality of Bysta and Chinese clinoptilolite - from the south-eastern Hubei region. Physi...
Article
Waste chemicals produced predominantly by textile industry and stored as unuseful waste for decades are disposed by thermal treatment. Because basic matrices of waste chemicals consist of printing colour residues and organic pigments, their disposal by incineration is decisive. Pilot tests with the charging dose of 40 kg of waste mixture per hour w...
Chapter
As it is generally known, zeolites are hydrated microcrystaline aluminosilicates containing exchangeble cations of alkali metals and of alkaline earth metals. Characteristic properties of zeolites arise from their molecular framework structures in that the assemblages of tetrahedra creating their porous structure happen to create regular arrays of...
Article
Full-text available
137Cs and134Ba were removed from synthetic aqueous solutions by means of natural zeolites of Slovakian origin. The equilibrium sorption behavior of Cs and Ba ions onto clinoptilolite and mordenite were studied under static as well as dynamic experimental conditions. Both Freundlich and Langmuir isotherms describe satisfactory by Cs and Ba adsorptio...
Article
The paper deals with the fundamental transport processes of 59Fe radionuclide from modelled aqueous solutions onto Slovakian zeolite and Chinese clinoptilolites as reference in order to determine external and internal diffusion parameters K, k1, k2, D. A simplified adsorption model was applied. Classical equilibrium and kinetic experiments in batch...
Article
Long-lived soil organisms Lumbricids, sampled at immission area of south-eastern vicinity of Slovnaft refinery, were used as indicators for environmental pollution by V, Ni, Cd and Pb. Heavy metal aerosols may originate from various burning processes of waste incineration in this area as well as of crude oil refinement. First of all, contents of V...
Article
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The paper presents a fundamental study of adsorption equilibria for aqueous solutions of iron(III) chloride with natural and Na+-converted indigeneous and Chinese clinoptilolites. Adsorption isotherms for systems studied at ambient as well as elevated temperatures were measured. In order to evaluate the process enthalpy a plot of logK versus 1/T wa...
Article
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Uptake of iodide radionuclide from model solutions has been tested by means of three various deposit clinoptilolites (of Nin Hrabovec — Slovakia, Md — Hungary and Wyoming —USA). The samples were chemically modified into more or less Ag-forms and the tests on adsorption were performed using columns packed with grain-sized zeolites. Breakthrough prop...
Article
The possibility of using the monoionic Ag+ - form of clinoptilolite of domestic origin for radioactive iodide separation from waters has heen studied. The capacity of the silver form of clinoptilolite towards iodide exceeds many times that of the capacity of clinoptilolite in natural form. Due to low solubility the product AgI iodides generate prec...
Article
Review of industrial utilization of natural clinoptilolite in the process of wastewater treatment and the results obtained in Slovakia as well as the recent experience from Zeotrips to Water Reclamation Plant in Tahoe-Truckee (California) and Upper Occoquan Sewage Authority in Centreville (Virginia), USA, is presented. The cation exchange selectivi...
Article
Biological remediation of soils contaminated with organic chemicals is an alternative treatment technology that can often meet the goal of achieving a permanent clean-up remedy at hazardous waste sites. Bioremediation involves the use of naturally occuring microorganisms to degrade and detoxify hazardous constituents in the soil. Results of this fi...
Article
The paper presents a fundamental study of the ion-exchange equilibria for aqueous solutions of isomolar salts of metal ions as well as natural and NH+4-converted clinoptilolites. High preference of clinoptilolite to some metal ions was the reason for carrying out comparative regeneration tests using NaCl solutions. Acid-regenerated clinoptilolite s...
Article
The term pesticide describes a chemical compound capable of being used to control the effect of pests on humans, agricultural crops, commercial operations and households. These compounds are selectively sought or formulated for specific toxic properties. The hazards that various toxic compounds may present for us and environment vary greatly. The r...
Article
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The aim of this study was to evaluate the quantitative and qualitative influence of some ions (ammonium, cesium, barium) on the adsorption capabilities of natural and chemically modified clinoptilolite towards Cs and Ba ions. Na–Cs–Ba — ternary ion-exchange isotherms at 23 C were measured and plotted in a triangular diagram. Using statistical metho...
Article
Full-text available
The possibility to use the monoionic Ag+-form (eventually Hg+- and Hg2+- forms) of clinoptilolite of domestic origin for radioactive iodide elimination from waters has been studied. The capacity of the monoforms of clinoptilolite towards iodide exceeds many times that of the capacity of clinoptilolite in natural form. Due to the low solubility prod...
Article
Full-text available
The subject of this paper was to study Co2+-ion removal from aqueous solutions by means of natural mordenite and clinoptilolite. The mentioned zeolites were of Slovak origin (SFR). The static and dynamic equilibrium adsorption of Co2+-ions by zeolites, the influence of pH, quality and quantity of interfering ions on adsorbate/adsorbent system were...
Article
The purpose of the work was to verify and demonstrate, on a pilot plant scale, the applicability of the Slovak clinoptilolite as a natural selective ion exchanger for the removal of ammonia from tannery wastewaters. During the pilot treatment experiments at an industrial wastewater treatment plant of the Shoe Manufacturing Industry Svit-Otrokovice,...
Article
On the basis of statistical and dynamical adsorption equilibria the adsorption ability of Ba and Cs by zeolitized tuffs were investigated. The determination of Ba- and Cs-concentrations was carried out using Ba (133) and Cs (137) radioindicators. The chosen method allows a very selective and sensitive detection. Some correlations connected with the...
Chapter
The paper deals with fabrication of carbonized and hydrophobized clinoptilolite-rich tuff using organic carbon rich substances, which were pyrolytic combusted and covered the external zeolite surface. Hydrophobization of the zeolite external surface was accomplished by octadecylammonium surfactant. Both surface modified clinoptilolite-rich tuffs we...
Article
Full-text available
Over the last few years, there has been a significant development in interest for P and N recycling, particularly within the water industry concerning sewage, but also agricultural and industrial wastes. Where nutrients cannot be recycled by agricultural spreading of biosolids, a number of pathways and innovative technologies have been developed an...