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Aplication of gas chromatography for determination of drug residuals in waters
Lacina, Petr ; Stoupalová, Michaela (referee) ; Vávrová, Milada (advisor)
Diploma thesis is focused on the choose of methods and optimalisation analysis procedure of selected pharmaceuticals (salicylic acid, ibuprofene, naproxene, ketoprofene and diclofenac) in surface and waste water by using gas chromatography with mass spectrometer (GC-MS). Solid-phase extraction (SPE) with Oasis HLB cartridges was used as an extraction method in this analysis. Extraction is followed by derivatization and their optimalization of selected pharmaceuticals. Derivatization and its optimalization were performed by two silylation reagens N-methyl-N-(trimethylsilyl)trifluoroacetamide (MSTFA) and N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA). Different volumes of derivatization reagents, different temperatures and different times were used during the procedure. The best combination is then used for analysis of real samples. Real samples of waste water were collected in sewage treatment plants in Brno – Modřice and real samples of surface water were collected from several rivers and one pond in region Moravia. This thesis also presents and tests SPE methods for extraction and concentration selected sulfonamide residues (sulfamethazine, sulfamethoxazole, sulfapyridine and sulfathiazole) from the aquatic environment.
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Study of micropolutant removal at the root sewage treatment plant
Pešková, Karolína ; Zlámalová Gargošová, Helena (referee) ; Mravcová, Ludmila (advisor)
This bachelor thesis focuses in the theoretical part on explaining the concept of a root sewage treatment plant. There is also a more detailed description of these root sewage treatment plants functioning. Attention is paid to the phases of root sewage treatment plants, their basic functional principles, vegetation, selected pharmaceuticals and methods of their determination. In the experimental part, samples of wastewater from the root sewage treatment plant in Dražovice in Vyškov District, were processed. Eight selected drugs (atenolol, azithromycin, diclofenac, ibuprofen, carbamazepine, clarithromycin, sulfamethoxazole and trimethoprim) were monitored in wastewater. These drugs were isolated from wastewater by solid phase extraction and then a method for identification and quantification was used – liquid chromatography with mass detection.
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Removal of selected medicines from waste water by oxidation processes
Úterský, Michal ; Rusník,, Igor (referee) ; Kučerík,, Jiří (referee) ; Hlavínek, Petr (advisor)
A concept of removing of pharmaceuticals from a wastewater is become more important topic. Currently we can see the increasing consumption of pharmaceuticals worldwide and an increasing effective doses of pharmaceuticals due to the resistance of microorganisms. Generally, a medicine means an active substance or their mixtures. The medicine is used for positive influencing of human’s and animal’s health. Nevertheless, a long term presence of pharmaceuticals in the environment leads to chronic toxic aquatic organisms, possibilities of multiplication of multi-resistant pathogenic bacterial strains, deterioration of reproduction of animals and their endocrine system. My dissertation is focused on a removing of pharmaceuticals from the wastewater via advanced oxidation processes. Results of research showed that the advanced oxidation processes are able to reduce concentration of pharmaceuticals. Mainly priority of this problem is other cleaning level of the wastewater which flows away from urban WWTP to river. Wastewaters consist of large volume of pharmaceuticals due to excrements, urination and flushing of outdated pharmaceuticals. An efficiency of advanced oxidation processes on the removal selected types of pharmaceuticals is a part of practical selection of the dissertation.
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The Use of Separation Methods for the Study of Selected Drugs and Pesticides in Water
Burešová, Jitka ; Hajšlová, Jana (referee) ; Chýlková, Jaromíra (referee) ; Kráčmar, Stanislav (referee) ; Vávrová, Milada (advisor)
This work is focused on the study of penetration of pesticides and pharmaceuticals in the aquatic environment. The aim was to develop and verify the optimal method for long-term monitoring of the occurrence of selected pesticides and pharmaceuticals in surface waters. Two frequently used analgesics ibuprofen and diclofenac, and carbamazepine that is used to treat epilepsy, were chosen from the group of drugs. A group of 41 pesticides were selected for monitoring too. The attention was focused on a group of urea pesticides and phenoxyacetic acids, as well as on selected pesticides falling to the group of priority substances or identified as environmental quality standards. Some of pesticides were selected because their consumption in the Czech Republic exceeds 30 tons a year. Liquid chromatography with tandem mass spectrometry (LC / MS / MS) was used for the determination of selected analytes in surface waters. Two optimized analytical method were developed. Ten analytes were determined in negative ion mode and 34 analytes in positive ion mode. Solid phase extraction (SPE) was used for purification and concentration of the samples. Developed methodology was validated and used for monitoring of selected compounds in samples of surface waters from the Morava River basin. Samples were collected on the rivers Morava and Svratka monthly for two years. Samples from the river Blata and stream Nivnička were collected for one year. Surface water samples were also collected from the river Litava. Four samples were taken throughout the length of the flow during one day. Smaller streams were chosen for monitoring because of the probability of occurrence of pesticides. They flow abundantly agriculturally cultivated areas. Drugs ibuprofen and diclofenac were detected in all taken samples, carbamazepine mostly. Among the most commonly occurring pesticides were bentazon, diuron, isoproturon, carbendazim, MCPA, MCPP, propiconazole, tebuconazole and 2,4-D.
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Application of Gas Chromatography with Mass Spectrometric Detection for the Assessment of Drug-residue Contamination of Wastewaters and Surface Waters
Lacina, Petr ; Čáslavský, Josef (referee) ; Hajšlová, Jana (referee) ; Sokol,, Jozef (referee) ; Vávrová, Milada (advisor)
This work is based on the current issue of increasing concentrations of pharmaceutical residues in various components of the environment. These new environmental contaminants continuously enter the environment. The most affected environmental component is the aquatic environment. This study is focused on the development and optimization of reliable analytical method, which can determine selected drugs in the aquatic environment (waste waters and surface waters) qualitatively and quantitatively. The target compounds were selected mainly from the group of non-steroidal anti-inflammatory drugs (NSAID): salicylic acid, acetylsalicylic acid, clofibric acid, ibuprofen, acetaminophen, caffeine, naproxen, mefenamic acid, ketoprofen and diclofenac. NSAIDs are one of the most used drugs in Czech Republic. For the final analysis of this study was used the comprehensive two-dimensional gas chromatography with mass spectrometric detection Time-of-Flight (GCxGC-TOF MS). It is a very sensitive and reliable analytical method for trace and ultra-trace analysis. Simultaneously, solid phase extraction (SPE) and derivatization are optimized in this work. Optimized analytical method including SPE, derivatization with MSTFA (N-methyl-N-(trimethylsilyl) trifluoroacetamide) and final analysis by GCxGC-TOF MS were applied successfully for the analysis of real samples. Samples of waste water were collected from the waste water treatment plant in Brno – Modřice and samples of surface water were collected from two river streams Svratka and Svitava in Moravian region. The range of concentrations of selected drug residues varied from one to tens of g/L in wastewater and from tens to hundreds of ng/L in surface waters. The degree of wastewater and surface waters contamination by drug residues is assessed in conclusions of the work. Simultaneously, spontaneous degradation of selected drugs in water and removal efficiency of the wastewater treatment plant is assessed in conclusions of the work. The developed method is usable for monitoring and environmental analysis of water ecosystems. It is usable not only for selected drugs, but even for other organic compounds with similar properties.
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Pharmaceuticals in drinking water and their removal
Benešová, Tereza ; Načeradská, Jana (advisor) ; Vašatová, Petra (referee)
This bachelor thesis focuses on the presence of pharmaceuticals in drinking water and their effective removal. The first part of the thesis describes in detail the pathway by which pharmaceuticals enter surface waters that can serve as a source for drinking water. In the Czech Republic, these are sources of drinking water for Prague and its surroundings. Because filtration, flocculation/coagulation is not efficient enough, it removes only 20% of the drugs such as ibalgin, carbamazepine, naproxen and diclofenac. Therefore, it is necessary to supplement drinking water treatment plants with other processes such as adsorption on activated carbon, which removes up to 98%, ozonation and advanced oxidation processes, with an efficiency of up to 99%, and UV/chlorine removes up to 80% of pharmaceuticals. I found that monitoring of pharmaceuticals in drinking water is not systematic and there is a lack of setting of possible limits. The Želivka water treatment plant was found to carry out tests for pharmaceuticals only once a year, which I consider insufficient. I think that it is advisable to carry out more frequent analyses of medicines in drinking water in order to have a continuous overview of the situation. In addition, there are no long-term studies examining the effect of medicines in drinking water...
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Changes in plant metabolism due to phytoremediation of pharmaceuticals
Polívková, Linda ; Bělonožníková, Kateřina (advisor) ; Chmelík, Josef (referee)
As a result of human activity, the rate and amount at which various pollutants enter the environment are increasing. Among them, pharmaceuticals and their metabolites, whose fate in nature has not yet been fully understood, have a key role to play. Phytoremediation, as an alternative method to the traditionally established methods of remediation of pollutant- contaminated wastewater and soils, has an increasing potential to become an important and ecologically friendly tool for environmental restoration and conservation. In this bachelor thesis, the effect of the pharmaceuticals buspirone, dextromethorphan, ibuprofen, the combination of dextromethorphan and ibuprofen, paroxetine and sulpiride on the antioxidant system of maize (Zea mays L., DKC 3969) cultivated in vitro in hydroponics under sterile conditions was investigated. The activity and isoenzyme composition of peroxidases, which are among the key components of the antioxidant system, were determined in maize plants. The amount of total soluble proteins in plants was reduced in most cases due to the influence of the aforementioned pharmaceuticals. In contrast, the specific activity of total peroxidases, ascorbate peroxidase and guaiacol peroxidase was increased in most cases, most notably by buspirone, sulpiride and the combination of...
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Selective screening of antiparasitic substances
Wernerová, Klára ; Mach, Jan (advisor) ; Kovářová, Julie (referee)
The mitochondrion is the key organelle of the cell. It is involved in energy metabolism, the Krebs cycle, the respiratory chain, and the formation of Fe-S clusters, which form the structure of many proteins. Therefore, disruption of the mitochondria is usually fatal to the cell, especially if it contains only one mitochondrion, as is the case in Trypanosoma brucei brucei. The T. b. brucei parasite has become the primary model organism for our study because its basic biochemical processes are already well described, including mitochondrial metabolism, and it is also easy to cultivate in the laboratory. Other model organisms we used in this study were Leishmania mexicana, Cryptococcus neoformans and Candida albicans. All these organisms are causative agents of serious diseases, and although there are drugs against them, new drugs need to be developed due to the frequent emergence of resistances. Mitochondria-targeting drugs are promising for the pharmaceutical industry. In this work, we investigate the efficacy of compounds whose structure is composed of a mitochondrial phosphonium anchor linked to a carbon chain. These substances are capable of incorporation into the mitochondrial membranes. The work not only focuses on comparing the potency of the tested substances in selected model organisms, but...
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Analysis of drugs in the earthworms using the QuEChERS method
Navrkalová, Jitka ; Kučerík, Jiří (referee) ; Mravcová, Ludmila (advisor)
The content of this Bachelor‘s thesis is an analysis of pharmaceuticals in earthworms using the QuECHERS method followed by the LC-MS/MS analysis. The theoretical part focuses on the specific groups of used drugs, their properties and applications. Furthermore, it focuses on the occurrence of drugs in the environment from their input to the negative consequences including the impact on earthworms. The theoretical part also discusses the QuEChERS method and liquid chromatography with mass spectrometry. At first in the experimental part, the QuEChERS method (concretely parameters like organic solvent, aqueous phase composition, amount of EDTA, purification method) was optimized for the extraction of 31 drugs from earthworms analytically completed by LC MS/MS. This optimized and validated method is subsequently applied to the extraction of drugs from earthworms from the performed experiments. The experiments focus on the effect of drug concentration in soil and the presence of biochar on the uptake of different drugs by earthworms.
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