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1

Uric acid in the surface waters of Spitsbergen and its role in the dissolution processes which affect carbonate rocks

100%
Burzyk M., Pulina M., Sajewicz M., Zjawiony I.
Polish Polar Research
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2006
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tom 27
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nr 4
327-340
Using High Performance Liquid Chromatography, concentrations of uric acid in the surface waters of two non-glaciated catchments (Fugle and Dynamisk) on Spitsbergen were measured. Measurements of specific conductivity enabled us to perform tests on the dissolution of the carbonate rocks present in both catchments in both natural and aqueous solutions of uric acid. Samples of calcium urate were made and its water solubility determined. Given a knowledge of concentrations of uric acid. calcium ions and calcium urate solubility product. an estimate of the role of uric acid in the dissolution of carbonate rocks was possible. Uric acid increases the dissolution of carbonate rocks by c. 12.5% in case of the Fugle catchment and 7% in Dynamisk.
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Heavy metals in the unsaturated and saturated zone of the Upper Jurassic carbonate massif in the vicinity of Krakow

100%
Rozkowski J., Rozkowski K., Rahmonov O.
Journal of Elementology
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2015
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tom 20
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nr 2
Migration and concentration of heavy metals in infiltration waters within unsaturated and saturated zones of a carbonate massif result from their mobility as well as anthropopression. The purpose of this project, carried out in 1995-2005, was to observe changes in the chemical composition of infiltration waters, especially Sr, Ba, Fe, Mn, and Zn concentration in precipitations, in soils and in caves within an unsaturated zone and a saturated zone situated in a carbonate massif. Field research was conducted in the Prądnik River’s drainage basin and at the Zakrzówek horst in Kraków. The chemical and mineralogical composition of limestone samples from 11 different quarries and natural exposures in the Kraków Upland were studied. The mineralogical research was conducted using the Roentgen diffraction method. The concentration of Sr, Ba, Fe, Mn and Zn in 700 samples from precipitation, caves and saturated zone waters was analysed. The determinations were made using mainly the ICP-AES Plasma 40 and ICP-MS Elan method. To assess the quality aspects of the migration of heavy metals, the results of the geochemical modelling were accounted for using the PHREEQC software. The hydrochemical research has shown distinct variability of concentrations of the analysed minor elements in different forms of precipitation (the highest concentrations being observed in sleet and the lowest in pure snowfall). In rainwater as well as in waters of the unsaturated and saturated zones, quantities of the five chemical elements appeared in the following decreasing order: Fe>Zn>Mn>Sr>Ba and Sr>Ba>Fe>Zn>Mn. The chemical composition of infiltration waters in the carbonate massif changes vertically. The fundamental trends in the waters of this area include an increase of Sr and Ba concentrations, a decrease of the concentration of Zn, and static concentrations of Fe and Mn.
3

Models of deformation in sedimentary rocks

84%
Pininska J.
Prace Naukowe Uniwersytetu Śląskiego w Katowicach
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1996
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nr 1602
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Chemical composition of shells of Cepaea vindobonensis (Férussac, 1821) (Gastropoda: Pulmonata: Helicidae) from localities with different substrata

67%
Mierzwa D.
Folia Malacologica
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2011
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tom 19
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nr 2
Chemical composition of shells of Cepaea vindobonensis (Férussac) from sites with carbonate and carbonate-silica bedrock in central and south-eastern Poland and from alluvial deposits of the Vistula River indicates a relation between the chemism of the environment in which the species occurs and the chemical composition of the shells. The ability to accumulate heavy metals in the shell of C. vindobonensis makes this species a potential bioindicator.
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