Jaromír Hanák - Academia.edu (original) (raw)

Papers by Jaromír Hanák

mi bentonity odstranily (za identických podmínek) z vody kontaminované ionty Pb nebo Cd poměrně m... more mi bentonity odstranily (za identických podmínek) z vody kontaminované ionty Pb nebo Cd poměrně méně těžkých kovů, zůstatkové koncentrace těchto kovů nevýrazně překračovaly NMH. Tento nedostatek však pravděpodobně může být eliminován zvýšením dávky sorbentu. Z výsledků sorpčních zkoušek kationtu Hg na testované vzorky vyplývá, že žádný ze zkoušených vzorků neodstranil (i při nejnižších vstupních koncentracích Hg iontů 10 μg.l ) takové množství rtuti, aby výstupní koncentrace byla nižší než NMH.

Journal of Petroleum Geology, 2008

Oil at the Zdanice field in the SE Czech Republic is reservoired at a depth of 900 m in weathered... more Oil at the Zdanice field in the SE Czech Republic is reservoired at a depth of 900 m in weathered Precambrian granitoids and Lower Miocene sandstones and conglomerates. Tertiary claystones, siltstones and sandstones form the top seal. Surface gamma-ray spectrometry carried out along two profiles across the field (6,880 m and 8,335 m in length, respectively) found perceptible decreases of K, U, and Th concentrations relative to background values. This can be explained in terms of enhanced leaching of these radionuclides by groundwater acids derived from hydrocarbons. Observed increases in radon and thoron in soil gas above the oil-producing zone at Zdanice may be caused by enhanced gas emanation from U-and Th-bearing minerals decomposed by groundwater acids. Laboratory analyses of 444 samples collected from 18 shallow boreholes (20 m deep) pointed to a trend of decreasing K, U and Th concentrations above the oilproducing zone at Zdanice. Decreases in rock porosity and organic carbon content were also noted together with an increase in mineralogical density, magnetic susceptibility and sulphur content. Petrophysical analyses of 330 samples from deep boreholes showed lower values of K and U in samples from oil-producing wells. These observations of minor petrophysical alterations in rocks overlying the Zdanice oilfield may be characteristic and may be applicable to hydrocarbon exploration operations elsewhere.

Physics and Chemistry of the Earth, Parts A/B/C, 2003

In the most rocks, the heating segment of the curve representing the bulk magnetic susceptibility... more In the most rocks, the heating segment of the curve representing the bulk magnetic susceptibility to temperature relationship is very different from the cooling segment, indicating phase and/or compositional changes imposed by heating. On the other hand, repeated run usually results in converging heating and cooling curves. It is hypothe- sized that the same effect may work also in the

Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy, 1999

Abstract Ceramics was used as model to investigate the pore fabric originated during ductile defo... more Abstract Ceramics was used as model to investigate the pore fabric originated during ductile deformation. The magnetic anisotropy was used to measure the connected pore fabric after pore saturating by the ferromagnetic fluid. The ductile deformation of the ceramics was investigated through measurement of magnetic anisotropy of dry specimens. The character and symmetry of the pore fabric are compatible with those of the deformations forming the fabric of the ceramics.

Bulletin of …, 2003

Compositions of organic matter in soil and sediment samples were analysed using standard geochemi... more Compositions of organic matter in soil and sediment samples were analysed using standard geochemical analytical methods. The tested set contained 44 lake sediment samples from three depth profiles on the bottom of the Horní Bečva Reservoir and 14 samples of uncultivated soil from shallow profiles at the localities of interest: Potočník, Lelekovice and Červenohorské sedlo Saddle. Organic matter was characterised by determinations of individual carbon fractions/forms (C tot , C org , C min , C HS , C HA , C FA), by customary analyses of group parameters (Hum, EOM, TES, NES, AOX-S) and also by multicomponent analyses of the contents and distributions of individual selected hydrophobic organic pollutants-normal and isoprenoid alkanes (SH n+i), polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB) and organochlorinated pesticides (OCP). Reliability of data, characterising organic compositions of the tested samples, was guaranteed by certified analytical methods and consequently verified by statistical evaluations of correlations between the values of definitionally related quantities. Characteristics of the organic matter were then used in a parallel investigation of sorption properties of some of the samples. Results of pollutant analyses were also evaluated and discussed with respect to the Czech national legislation limits for permissible pollution of the environment; they proved, in general, a significant and widespread background distribution of some of these xenobiotics in the examined rock environments. Characteristic distributions of individual alkanes determined by multicomponent analyses also helped to distinguish external hydrocarbon contaminations from the natural background as well as to estimate a probable source of contamination.

The work aims to present the preliminary results of the study of distribution of heavy metals and... more The work aims to present the preliminary results of the study of distribution of heavy metals and toxic elements in the profiles of chosen dug holes in the area of Králický Sněžník. We have focused mainly on the changes in the element contents depending on the sampling depth, and on the mutual correlations among the elements. We have also monitored several radioactive elements (including the anthropogenic 137Cs nuclide that contaminated the environment after the Chernobyl disaster) and tried to trace the origin of the contaminants in the rock environment.The work aims to present the preliminary results of the study of distribution of heavy metals and toxic elements in the profiles of chosen dug holes in the area of Králický Sněžník. We have focused mainly on the changes in the element contents depending on the sampling depth, and on the mutual correlations among the elements. We have also monitored several radioactive elements (including the anthropogenic 137Cs nuclide that contamin...

The survey aims to determine the extent, the level and the vertical distribution of chosen contam... more The survey aims to determine the extent, the level and the vertical distribution of chosen contaminants in soils of various cultivation (forests, pastures, fields) in the areas of Králický Sněžník, Jeseníky, Orlické hory and Moravian-Silesian Beskydy Mts. The research is focused namely on radiogenic 137Cs (half-life of 30.1 years), to a lesser extent also on the isotopes of U, Th, K.The survey aims to determine the extent, the level and the vertical distribution of chosen contaminants in soils of various cultivation (forests, pastures, fields) in the areas of Králický Sněžník, Jeseníky, Orlické hory and Moravian-Silesian Beskydy Mts. The research is focused namely on radiogenic 137Cs (half-life of 30.1 years), to a lesser extent also on the isotopes of U, Th, K

V roce 2006 byla dokončena terénní gamaspektrometrická měření dle požadavků zadavatele, byla prov... more V roce 2006 byla dokončena terénní gamaspektrometrická měření dle požadavků zadavatele, byla provedena laboratorní radiometrie půdních vzorků a šlichových frakcí, včetně úprav, zhodnoceny a interpretovány výsledky. Mapa plošné aktivity 137Cs v půdě z roku 1987 (IHE 1987) uvádí pro zájmové území CHKO Beskydy hodnoty malého počtu odběrů vzorků v mezích do 10 kBq.m-2. Pozemní gamaspektrometrická měření 2006 s hodnotami 137Cs převážně v mezích 2 – 10 kBq.m-2 a maximem 16,1 kBq.m-2 jsou upřesněním údajů k roku výzkumu 2006 o plošné distribuci radiocezia. Z provedených terénních radiometrických měření, a i z laboratorních měření odebraných vzorků, vyvstává přesnější obraz o kontaminaci území Moravskoslezských Beskyd 137Cs. Ve shodě s očekáváním jsou vyšší hodnoty plošné aktivity 137Cs především v lesích, většinou na exponovaných místech, kde byly v době těsně po havárii vyšší srážky a kde se 137Cs udrželo v humózním povrchovém horizontu. Na obdělávaných plochách, především polích, se 137C...

Práce uvádí vztahy mezi magnetickou susceptibilitou, event. magnetickými minerály a obsahy PHM v ... more Práce uvádí vztahy mezi magnetickou susceptibilitou, event. magnetickými minerály a obsahy PHM v sedimentech vybraných nádrží a rybníků. Jsou připraveny první systematické poznatky týkající se ekologické problematiky vodních sedimentů na území ČR

Analysis of the chemical composition of heavy minerals such as garnet, amphibole and tourmaline r... more Analysis of the chemical composition of heavy minerals such as garnet, amphibole and tourmaline represents a very efficient tool for determination of the source area of clastic sediments. In small and geologically simple river basins containing contrast rocks, this method even allows to quantify to certain degree the share of the individual rock types on the modal composition of clastic sediments. There are, however, substantial limitations for the applications of this method. The chemical composition of heavy minerals present in the sediments of small streams is considerably influenced by the local geological setting of the particular sampling site and it is very often impossible to determine the exact proportion of the material coming from older sedimentary formations.

The article aims to present the preliminary results of a geochemical survey of rocks in the sourc... more The article aims to present the preliminary results of a geochemical survey of rocks in the source areas of Bilý potok and Frysavka streams. These streams flow through geological units of varied structure and composition (Cretaceous, Svratka Crystalline Complex, Policka Crystalline Complex, Moldanubicum). Over 80 samples which had been collected from the profiles of 13 dug holes in the two source areas were subjected to analyses of heavy metals and radiogenic elements, to silicate analyses and others. Within the scope of the pilot interpretations, the results of the analyses of chosen elements were compared with those from the other localities and also the trends of content-changes with depth were observed. The ultimate goal is to design a model capable of describing the changes in the rock environment occurring during the exogenous processes (including the formation of the soil horizon) and during the gradual material transport towards the watercourses.

Studia Geophysica et Geodaetica, 2010

Magnetic susceptibility of 72 cambisol profiles from the vicinity of the Vír dam, NW Moravia was ... more Magnetic susceptibility of 72 cambisol profiles from the vicinity of the Vír dam, NW Moravia was measured. The enhanced susceptibility of topsoil, particularly of the horizon O, was assessed from the aspect of vegetation setting and magnetic mineralogy. Magnetic susceptibility variations with field and temperature as well as frequency dependent susceptibility were applied to indicate magnetic carriers. It was found that the enhanced magnetic susceptibility is caused very likely by the presence of maghemite and magnetite of various grain sizes. Magnetic minerals are pedogenic in origin in all three horizons, while in the O and A horizons they are mostly anthropogenic in origin. Magnetic susceptibility was correlated with contents of trace

Physics of the Earth and Planetary Interiors, 1988

ABSTRACT The magnetic anisotropy of rocks from the Branisko and Čierna hora Mountains (West Carpa... more ABSTRACT The magnetic anisotropy of rocks from the Branisko and Čierna hora Mountains (West Carpathians) was investigated, and the ferromagnetic and paramagnetic components were separated and found to be roughly coaxial. The magnetic fabrics in metamorphic, granitoid, and sedimentary rocks display very similar patterns of principal susceptibilities. Metamorphites underwent a polyphase prograde and retrograde metamorphis, granitoids were metamorphosed retrogressively, and sedimentary rocks suffered a very weak prograde metamorphism. Retrogressive and progressive Alpine metamorphism and the formation of magnetic anisotropy took place simultaneously, before, during. and after the emplacement of the Central West Carpathian nappes.

geology.cz

... Pro melechovský typ je specifickým rysem vysoký deficit obsahu Th, který indi-kuje vznik z ve... more ... Pro melechovský typ je specifickým rysem vysoký deficit obsahu Th, který indi-kuje vznik z velmi chladné taveniny. ... Jihlava, Faculty of Science, Charles University Prague, Miligal, sro, Brno, Tech-nická universita in Liberec, Aquatest, as, Prague, Engineering Geology ...

Journal of Environmental Radioactivity, 2010

The activity concentrations of Beryllium-7 ((7)Be), a naturally occurring radioisotope produced i... more The activity concentrations of Beryllium-7 ((7)Be), a naturally occurring radioisotope produced in the atmosphere, were measured in leaves of birch-trees, above-ground parts of grass, soil and rainwater in the mountain massive Kralicky Sneznik (the northeast of the Czech Republic, altitude about 750 m) in the years of 2005, 2006 and 2007. Dried and ground samples of the plants and soils, and water samples from wet deposition were used to determine the (7)Be content using a semiconductor gamma spectrometer. The (7)Be values ranged from 147.0 to 279.6 Bq kg(-1), from 48.7 to 740.8 Bq kg(-1), from 2.1 to 8.7 Bq kg(-1), and from 0.6 to 1.9 Bq kg(-1) in birch-tree leaves, grass samples, soils, and rainwater, respectively. Insignificant inter-annual variations but significant increase in the (7)Be activity concentrations during the spring and summer months were observed in birch-tree leaves and grass samples. The seasonal variation of the (7)Be concentrations in grass samples correlated (R(2) = 0.4663 and 0.6489) with precipitation. No similar correlation was found for (7)Be in birch-tree leaves. Beryllium-7 content in birch-tree leaves and in aerial parts of grass was mainly caused by direct transport of (7)Be from wet deposition into aerial parts of the observed plants.

sci.muni.cz

... Jaromír Hanák1, Pavel Müller1, Hana Müllerová1, Ivan Kaparec2, Vratislav Pecina3, Milo Abra... more ... Jaromír Hanák1, Pavel Müller1, Hana Müllerová1, Ivan Kaparec2, Vratislav Pecina3, Milo Abraham4, Bohumil Veleba4 ... Key words: radiogenic elements, geochemical interactions, anthropogenic contamination, Jeseníky, Králický Sněník, Orlic-ké hory, Moravian-Silesian ...