Publication details

Geochemická charakteristika dnových sedimentů řeky Olše

Title in English Geochemical characterization of bottom sediment in Olše river


Year of publication 2020
Type Appeared in Conference without Proceedings
MU Faculty or unit

Faculty of Science

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Description In these thesis I covered the evaluation of the selected elements content in the river Olše sediment and its significant tributaries. There are Stonávka, Karvinský stream, Hrabinka and Ropičanka. There were the pH changes and conductivities followed and the samples of the river sediments in 21 locations were picked up. All samples of the river sediments were determined at the content of elements by X-ray fluorescation spektrometry (XRF). Ten selected samples of the river sediments were determined at the content of organic carbon. The samples of the surface water were picked up in 8 locations and the water was determined at the basic anionts and cationts – sulfates, chlorides, sodium, potassium, magnesium and carbonates. The hydrochemical evaluation of the surface waters was created in the program The Geochemist’s Workbench. The highest values of the conductivity (1,27 – 40 mS/cm) were found in the Karvinský stream. The conductivity in the river Olše is fluctuating and the highest rise was repeatedly confirmed at extinction of Karvinský stream. The contents of common evaluated toxic elements as arsenic (from 5 mg/kg, KP 15 to 15 mg/kg, KP 16), copper (from 16 mg/kg ,PF 18 to 87 mg/kg, KP 01) and chrome (from 30 mg/kg, OL 01 to 419 mg/kg, KP 01) were low in the river sediments. The lead content is fluctating. Higher lead content was determined in Ropičanka Ro 08 (122 mg/kg) and in Olše OL 02 (114 mg/kg). In all locations the high zinc content was measured (from 41 mg/kg, PF 18 to 373 mg/kg, OL 02). In case of zinc all the locations were subdued into the class from 3 (slightly to strong contamined sediment) to 6 (excessive contemined sediment) according to the Igeo classification. Extremly high contents were meassured at vanad up to (9 463 mg/kg, KP 01) and strontium (up to 1 7889 mg/kg, KP 01). These can origine in paralilic sediments of the Upper Silesian basin. Surface waters of the north part of the studied territory show the higher conductivity (40 mS/cm, KP 01) of primarily Na+-Cl- waters, on the contrary in the south part of the territory it is about Ca2+-HCO3- water character with low conductivity (0,205 mS/cm).

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