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Nové ideje v technologiích pro desulfataci
Ďurďová, Libuše
Among technologies for desulphatation of AMD and wastes waters there is present the whole scale of technological applications of physical, chemical and microbiological processes. Among positive research results there are important patents of IEE TUO Ostrava with ecologically advantageous methods of precipitation of sulphates from AMD. Some new ideas on barriers for treatment of AMD waters presented can be applied for waste water cleaning and also for in situ improvement of ground water chemistry at vicinity of wellfield with sulphate concentration increasing above 300-400 mg.l-1.
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Simulace rozkladu jílů za přírodních podmínek s uplatněním heterotrofních bakterií v biologickém utváření Al gelů na Podluží (Jižní Morava, Česká republika)
Ďurďová, Libuše ; Štyriaková, I.
In study is experimentally quantified and characterised bioweathering of smectite which was used from mineralogical collections as it is a rich aluminium source of specific aluminium gels forming. Degradation process of silicate mineral, which occurr at the sediment/water interface as was traced and monitored with use of solution chemistry prepared according to Ashby. X- ray analyses and chemical analyses as well as electron microscopy techniques were used. Impact of bacteria Bacillus was determined on mineral surface and leaching of Mg, Si, and Al. By figures from samples from fields are documented stages of Al colloids and precipitated metal pieces forming from weathered rocks and their minerals. Al stayed at mineral surface at destruction place and formed colloids. Temperature increase affected the efficiency of ions extraction from entering material.
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Složení sedimentů, Al-Si gelů a precipitátů vázaných na výskyt elementálního Al, Si, Fe z monitorovacích vrtů u jímacího území Podluží
Ďurďová, Libuše
Occurrence of increased sulphate concentration in groundwater of the Quaternary sediments in the floodplane of the Morava river watershed is related to many specific features in hydrogeology, hydrochemistry, microbiology, geochemistry, exploitation of water resources, climatic conditions, and technical equipment of boreholes. One of the concsequences is genesis of 2-4 m thick layer of sediments at the bottom of moitoring boreholes Vis with mineral precipitates, sludge, Al and Si gelatines, precipitates of elemental forms of Al, Si and Fe. There were found also colloids of FeS2 composition and minerals goethite, magnetite, lepidocrocite, pyrite, greygite under extreme oxido-redox conditions.
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Sediments rich in Al and Fe formed at groundwater of borewells as a specific part of hydrogeochemical cycle at Podluží
Ďurďová, Libuše
The article summarises results of investigation of the precipitates from sediments and sludge at the bottom of the borewells at the wellfield Podluží and its vicinity. The article presents overview of petrography structure of rocks of boreweles VIS from wellfield Podluží, data on groundwater chemistry change in the Morava river watershed (from wellfield Kněžpole are given Kurlovov patterns of water chemistry from years 1960-1985), tables of water chemistry from VIS borewells from y. 1989 and 2002, composition of sediments from VIS borewells, sediments from the Morava river and canals at wellfield Podluží, composition of gely, X-ray analyses of metal precipitates with elemental Al, Si and Fe.
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Verification of application of factor analysis of water resources quality by maps
Ďurďová, Libuše
Chemistry development was assessed in locations where sulphate concentration increase exceeded 250 mg/l. For verification of layout physical and chemical water quality where composed maps in Arcview environment by method inverse distance weighted. Digital topological data vector maps ZABAGED in scale 1:10 000 were used. Evaluation of ground water chemistry development by application of factor analysis of physical and chemical water qualities was conducted.
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Application of water chemistry maps in research of water resources quality changes
Ďurďová, Libuše
Reults of research of chemistry development at surface and groundwater resource at Quaternary sediments of Morava River (districts Hodonín and Břeclav) were summarized in maps of main characteristics of water resource quality. Those maps showed how locations of decreased and increased concentration of sulphates and calcium, and value of acidity are the same, what is caused by their positive correlation, as well as locations of low values of pH, which has to them negative correlation.
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Quadratic factor analysis and modelling with quantification qualitative magnitudes
Tungli, L. ; Ďurďová, Libuše
Factor analysis reveals linear relationships and laws in data. Widenning of this analysis for a non linear functions of magnitudes is a possible widespreding of this methods. Another aspect is an attemp to go out from linear model and this model make more accurate by quadratic components of magnitudes later, what is very important in case of small number of measured data, where model is not meaningful. Another important demand is removal do so called system mistakes factors, which are consequences of small systematic mistakes in measurements.
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