Browsing by Subject "sediment"

Now showing 1 - 6 of 6

Access status: Open Access ,
Contrasting sediment and water chemistry indicates the extent of the hyporheic zone in a polluted river system
(Wydawnictwa AGH, 2016) Ciszewski, Dariusz; Aleksander-Kwaterczak, Urszula
The concentrations of zinc and cadmium were determined in the sediment cores sampled from the floodplain and the channel in the middle reach of the Biała Przemsza River valley (southern Poland). The results were compared to the river water and groundwater chemistry in order to reveal the average extent of the hyporheic flow. The loss of river waters through the river bed due to the natural migration modified by the drainage of the lead-zinc ore mine caused the strong pollution of the river bed sediments with heavy metals to the depth of almost three meters below the water table in the river. Moreover, the similar groundwater and river water chemistry at that depth suggests that the vertical extent of the hyporheic zone, which exceeds a depth of several meters below the channel, can be affected by the drainage of river waters by the lead-zinc mine. The lateral extent of the hyporheic flow, indicated by changes in groundwater chemistry and elevated heavy metal concentrations in the sediments, was of the order of dozen of meters. The investigation documents the large impact of the secondary <i>in situ</i> enrichment of sediments with heavy metals in the hyporheic zone.
Access status: Open Access ,
Diagenetic impact on reservoir quality in deeply buried tight Rotliegend Sandstones - case study of Polish Permian Basin
(Wydawnictwa AGH, 2014) Nosal, Justyna
During burial, sediments and rocks undergo physical and chemical changes due to temperature and pressure growth. All these processes are known as diagenesis (Boggs 2009). These changes play an important role in postedpositional modification of reservoir parameters, such as porosity, permeability and filtration.
Access status: Restricted ,
Dobór optymalnej metody immobilizacji metali w osadach
(Data obrony: 2016-07-14) Wojciechowska, Paulina
Wydział Geologii, Geofizyki i Ochrony Środowiska
Proces wymywania metali ciężkich z osadów jest ściśle uzależniony od pH środowiska wodnego. Dobre właściwości buforowe osadu są cechą pożądaną, ponieważ wraz ze wzrostem zakwaszenia środowiska wodnego wzrasta stężenie uwalnianych pierwiastków. W niniejszej pracy podjęto próbę immobilizacji Cd, Zn oraz Pb w zanieczyszczonych osadach rzecznych z wykorzystaniem soli fosforanowych oraz minerałów naturalnych. Za najlepszy dodatek pozwalający na immobilizację Cd uznano diwodorofosforan sodu $(NaH_{2}PO_{4}; \; 91\%)$. Fosforan wapnia $(Ca(H_{2}PO_{4})_{2})$ okazał się najefektywniej sprzyjać immobilizacji Pb (100%), natomiast w przypadku Zn był to kaolinit (69%).
Access status: Open Access ,
Innovative hydromechanical cleaning of mine water sedimentation tanks in underground headings
(Wydawnictwa AGH, 2021) Biel, Bronisław
In mines, water from natural inflows as well as process water from fire protection systems is usually stored in sedimentation tanks, located primarily at the lowest level of the mine. Such water usually contains mechanical contaminants, undergoing the process of sedimentation. The article presents a method enabling the cleaning of mine water sedimentation tanks. The method involves jet mining, hydrotransport and segregation into sediment (i.e. the solid fraction) and water. The consistence of sediment obtained after segregation makes the former transportable (e.g. using an appropriate conveyor/feeder), whereas water can be reused subsequently in the jet mining of sediment. One of the solutions enabling the performance of the above-named process is a ZEKO series system.
Access status: Open Access ,
The reconstruction of river system pollution changes with metals in shallow floodplain water reservoirs during the onset of the post-industrialisation period
(Wydawnictwa AGH, 2025) Ciszewski, Dariusz; Szarek-Gwiazda, Ewa; Pociecha, Agnieszka
Towards the end of the 20$^{th}$ century, Poland’s economy experienced a transformation in terms of its industry and increasingly stringent environmental requirements. Together, these resulted in the general improvement of the quality of the aquatic environment. The Chechło River catchment is an example of such changes, where the closure of many industrial plants (including a zinc-lead [Zn-Pb] mine), the reclamation of several hot spots and the extension of sewage treatment contributed to a general decline in sediment pollution with Zn, Pb and Cd. The aim of the investigations was to evaluate the rate of these changes in order to assess the river recovery rate to the pre-industrial pollution level. The research involved the comparison of sediment pollution in subsidence reservoirs from two different eras: the peak of pollution and the post-industrial era. We observed a decrease in sediment pollution, mostly influenced by the closure of the Zn-Pb mine in 2010, despite many sources being closed or mitigated at that time. The change in sediment pollution was very well observed in the younger reservoir of the post-industrialisation period which is an efficient trap for sediments transported since ca. 2007. Considering that the sampling took place less than 10 years after the closure of the mine, we could regard the 3-4-fold drop as a rapid change. In older reservoirs, which were active already during the period of peak river pollution but connected with the river only by narrow ditches, changes in sediment pollution were minor. Pollution changes expected in the future will be much slower because the supply of pollutants from diffuse sources has dispersed in the prevailing part of the catchment.
Access status: Restricted ,
Wpływ historycznej aktywności kopalni rud cynku i ołowiu na zanieczyszczenia osadów rzeki Matylda (okolice Chrzanowa)
(Data obrony: 2010-07-29) Jędrosz, Marta
Wydział Geologii, Geofizyki i Ochrony Środowiska
This thesis concerns the degree of pollution of Cd, Zn and Pb deposits of the Matylda River channel (Chrzanow region). Therefore, collected 19 samples of bottom sediments from about 9 km river section, wherein examined the pH and Eh and determined the contents of Cd, Zn and Pb by ICP-MS method. Collected also 9 samples of water,wherein specified pH, electrolytic conductivity, examined the content of major anions and cations, and selected heavy metals determined. The obtained values of heavy metals in sediments reached the highest concentrations of Cd - 458 mg/kg, Pb - 58,456 mg/kg and Zn - 86,814 mg/kg. These quantities highly exceed both the background adopted for the local Polish rivers and the local geochemical background. It was found that very high concentrations of elements must be the result of multi-channel discharge into the Matylda River, mine water from the lead and zinc mine Matylda.