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The contamintation level of sediments from water reservoir Orlík by organic and inorganic pollutants
Dvořák, Tomáš ; Száková, Jiřina (advisor) ; Vymazal, Jan (referee)
Due to sorption processes, sediments can retain a wide range of toxic substances, which are transported together with the sediment over long distances from the place of their origin. Dam reservoirs are significant sinks of such sediments and they can be indicative of the overall burden level in surface water of the basin. This thesis works with the assumption that sediments of a valley reservoir can help to estimate the sources and extent of water pollution in the area of interest.
The aim of this thesis was to assess i) the level of contamination of bottom sediments in the Orlík reservoir with organic and inorganic pollutants, and ii) the potential impact of individual tributaries on the overall level of contamination of the sediments. In the literature review, the current level of knowledge in the topic of the total contents and speciation of toxic elements and specificities of the behavior of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in water, sediments and aquatic organisms was evaluated. The biological activity and eutrophication potential of sediments were discussed, as well.
A total of 34 composite samples of bottom sediment collected in different parts of the Orlík reservoir and its major tributaries were evaluated. Bioavailability of major pollutants was also observed in individual tributaries based on their content in the tissues of mollusks.
Atomic spectrometry revealed increased concentrations of As, Cd and Zn in sediments of the Orlík reservoir. Arsenic concentration limits were significantly exceeded at the bottom part of the reservoir from the confluence of the Otava and Vltava rivers toward the body of the dam. Higher level of cadmium and zinc were detected in sediments of the Otava River. The analysis of tissues of bivalves in tributary areas confirmed significant bioaccumulation ability of cadmium. Among others, significant dependence of phosphorus level on the total content of iron and aluminum in sediments was detected.
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Risk element sorption on waste materials from olive oil production
Hovorka, Miloš ; Száková, Jiřina (advisor) ; Trakal, Lukáš (referee)
The main objective of this thesis is to verify the efficiency of waste material from olive oil production to immobilize risk elements Pb, Cd and Zn in extremely contaminated soil and to verify following hypothesis: application of waste material from olive oil production will limit the availability of risk elements in the soil and also improves a supply of soil available nutrients and biological properties of the soil. The work is divided into two parts, theoretical part (literature review) and experimental part.
The theoretical part contains a general description of the risk elements and their possible harmful effects on living organisms, indicating their possible sources of entry into the environment, describes the behavior of these elements in the soil, especially events that contributes to the retention of soil. Furthermore, there are some possible methods for remediation of soil contaminated with hazardous elements and is described in more detail immobilization technique using soil improvers. In this chapter is devoted to the waste material from olive oil production, whose properties are tested in the experimental part of this work.
The experimental part is focused on verification sorption capability of waste material from olive oil production for selected risk elements. As a waste material has been used dry olive residue (known as DOR), and DOR after remediation of these types of fungi: Penicillium chrysogenum, Coriolopsis floccosa, Bjerkandela adusta and Chondrostereum purpureum. Analytical methods were used to determine the concentrations of the elements, the pH, the point of zero charge (pHpzc), and cation exchange capacity (CEC) for the individual samples representing material DOR and DOR after remediation of certain species of fungi. The preliminary sorption experiment determined sorption efficiency for the elements Cd, Pb and Zn for all the material tested. Stability of the risk element bonds was verified via model desorption experiment. Model laboratory incubation experiment was carried out to assess the potential changes of hazardous elements mobility in the contaminated soil, depending on dose and type of DOR material. At the same time there were determined contents of available proportions of essential elements in the soil. The contents of elements were determined by atomic spectrometry (ICP-OES) and the results analyzed by adequate statistical methods.
Results showed good sorption capacity of the waste material DOR, especially after transformation with different species of fungi, for hazardous elements and particularly Pb, less then Cd and Zn. The desorption experiment, however, showed unstable linkages elements in samples DOR, particularly in the case of Zn, which is also reflected in the incubation experiment. This instability is probably due to the low pH material DOR, therefore it would be useful for further research take into account the increase of pH levels of these samples. In terms of elemental composition appears to be biotransformed DOR as a good source of nutrients. The treatment of thesoil increased accessibility of nutrients such as Cu, Fe and Mn for plants.
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The risk element contents in soil and vegetation cover at selected locations within Hradec Králové city
Bartošová, Tereza ; Száková, Jiřina (advisor) ; Hejtmánková, Alena (referee)
The county town named Hradec Králové is located in eastern Bohemia on the confluence of Elbe and Orlice rivers. It is situated in a flat area, with many green areas and the absence of heavy industry. The industrial activity is concentrated in small business - engineering, chemical, electrical and food processing industries. All these aspects of human activity may be associated with risk elements contamination of the environment. The town is characterised by the high traffic density; we can therefore also assume the presence of risk elements in the air and subsequently soil contamination in the proximity of these roads. The aim of the study was to analyze the level of contamination of soil and vegetation in the city caused by risk elements (As, Be, Cd, Co, Cr, Cu, Mo, Ni, Pb, V and Zn). According to sampling scheme, which involved 86 sampling points, there were taken samples of soils and aboveground parts selected plant species: dandelion (Taraxacum sect. Ruderalia) and doorweed (Polygonum aviculare) occurring at all the sampling points. These samples were analysed for the risk elements contents.
In most of cases the risk element levels did not exceed the maximum allowable limits for the content of elements in soil and plants given by Decree no. 13/1994 Coll. and Directive no. 2002/32/EC. In the case of soil, there were significantly higher values of potentially mobilizable contents measured for arsenic. But this was not reflected on the contents of this element in the vegetation when all results were below the detection limit of the analytical method. Rarely, the values exceeding the limits were observed in several soil samples in the case of lead and cadmium. While for lead no increased concentrations of this element in the vegetation was observed, the cadmium levels occurring in dandelion exceeded in several cases the limits for fodder crops. The ability of doorweed to accumulate the risk elements was lower compared to dandelion.
Linear regression analysis showed that there is no significant relationship between the element contents in the soil and vegetation and the distance from the road. It therefore appears that the contents of elements in the soil and vegetation are not affected by traffic. Due to the significant positive correlation of most elements (except Cd and Zn) in the soil can be estimated that the levels in the soil are given rather by the character of the subsoil. This speculation but would require more detailed geological and geochemical survey of the site.
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The contents of selected persistent organic pollutants in soils at selected locations within Hradec Králové city
Bartošová, Barbora ; Száková, Jiřina (advisor) ; Radim, Radim (referee)
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous contaminants entering the environment from both natural and anthropogenic sources. The main anthropogenic sources are processes for the production of electricity and thermal energy, waste incineration, road traffic and motor vehicles, aircraft, boats, steam and diesel-electric locomotives and some industrial technologies. Besides these main sources there are still a number of others, less important, e.g. working with hot tar, asphalt pavement wear and tire during vehicle operation, coking plants, plants for processing of oil and some metals plants. An indispensable source in the cities as domestic solid fuel burning furnaces.
Although Hradec Králové do not belong to the cities with extreme levels of contaminants in the air, according to the Czech Hydrometeorological Institute, the levels of benzo(a)pyrene in the case of annual average concentrations exceeding the maximum allowable concentrations occurred here in 2013. While air quality is monitored regularly, the PAHs contents in soils and vegetation are not so. In our simple single experiment, we decided to assess the level of contamination of soil PAHs in the land of Hradec Kralove. It was collected 86 soil samples, in which were determined contents of 16 PAHs. Further, mushroom fruit samples that were found in the individual sampling points were analyzed.
The results showed large variability of PAHs content in the city, but did not indicate significant levels of contamination. The sum of all the determined PAU does not exceed the permissible value of the contents of these elements in soils. However, in several cases exceeding the maximum allowable content in soils with different PAHs, especially fluoranthene, anthracene and chrysene. Linear correlation analysis showed that the levels of all monitored PAHs are close correlations, which indicates that the entire spectre of PAHs in this case always originates from the same source. The PAH contents in mushrooms were in most cases below the detection limit of the determination, only rarely the detectable contents of individual PAHs were found (Cylocybe gambosa, Agaricus arvensis). We can speculate about the limited ability of fungi to accumulate PAHs or their ability to degrade these substances.
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The ash quality monitoring of biomass combustion
Tlustoš, P. ; Ochecová, P. ; Száková, J. ; Perná, Ivana ; Hanzlíček, Tomáš ; Habart, J. ; Straka, Pavel
The aim of methodology was, on the basis of results of analyzes of ash from more than 40 sources in the Czech Republic, these ash categorize by feedstock and identify suitable ash for use on agricultural land. It could lead to a significant shift to reduce the cost of incinerators, to the entry of new businesses on the market and to easier fulfilling of republican obligations in the share of energy production from renewable sources. Another advantage of finding employment for these materials, from an environmental view, is the reduction of landfilling and support for recycling of nutrients. The methodology presented the process for the selection of suitable ash for agricultural purposes and the reader should be able to determine the applicability of the material.
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Biochar Preparation of Various Types of Biomass
Břendová, R. ; Tlustoš, P. ; Száková, J. ; Habart, J. ; Pohořelý, Michael ; Punčochář, Miroslav
Soil contamination by risk elements is a serious problem. There are available remediation methods, using plants to remove these elements from soil. Plants for our experiments were grown on contaminated soil of Příbram area. Biomass of these plants was used to prepare biochar, which could be used then as a soil additive and due to its characteristics, can be able to immobilize risk elements in soil. The experiment was focused on the biochar preparation. There was observed the effect of the type of biomass and the final temperature on specific surface area and yield of biochar: properties limit its application as a soil additive. While the final temperature increased, the specific surface area increased and the yield of biochar decrease. The highest surface area was found at biochar from wood mixture.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22012121014260 - PDF
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Influence of Pyrolysis Temperature and Type of Ligno-Cellulose and Cellulose Biomass on Yield, Specific Surface Area and Mechanical Resistance of Active Coal
Pohořelý, Michael ; Břendová, K. ; Krček, M. ; Šyc, Michal ; Punčochář, Miroslav ; Száková, J. ; Tlustoš, P.
In the Czech Republic, there are many contaminated agricultural soils due to anthropogenic activity and geogenic origin. The contaminated biomass of plants grown on the contaminated soils needs to be appropriately disposed of to prevent the re-releace of heavy metals into the environment. One way of processing contaminated biomass is pyrolysis, where the heavy metals are concentrated in biochar (active coal). This can be applied to soil where it improves the physical properties. The aim of the work was to observe the effect of temperature and the type of biomass grown on contaminated soils from a locality Příbram on the specific surface area, yield and mechanic resistance of active coal.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22012112316131 - PDF
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Changes in cytokinin contents and metabolism in spinach in response to zinc excess in soil
Žižková, E. ; Gajdošová, Silvia ; Pavlíková, D. ; Pavlík, Milan ; Száková, J. ; Motyka, Václav
Changes in endogenous cytokinin (CK) contents and metabolism in spinach (Spinacia oleracea L.) responding to excessive amounts of zinc in soil were studied. Application of three zinc rates in soil (250, 500, 750 mg.kg-1) resulted in a progressive (1.7- to 3.3-times) increase of endogenous CKs in spinach leaves. This increase was predominantly due to accumulation of inactive and storage CK forms (N- and O-glucosides) and was accompanied with an enhanced activity of cytokinin oxidase/dehydrogenase (CKX), the key CK degradative enzyme, especially on the highest zinc rate (750 mg.kg-1 soil). On this rate, maximum endogenous CK concentrations in both control and stressed plants were found at the first and the last samplings, i.e. in the course of very young leaf development and just before or during flowering. The CKX activity of stressed plants exceeded that of controls during the whole development and reached the maxima at the last sampling of treated plants.
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