Browsing by Subject "arsenic"

Now showing 1 - 7 of 7

Access status: Open Access ,
Arsenic in water from the Bystre Thrust-Sheet (Outer Carpathians, Poland): Geological and environmental implications
(Wydawnictwa AGH, 2024) Aleksander-Kwaterczak, Urszula; Andrzejak, Jakub; Świerczewska, Anna; Lukaj, Konrad
Wydział Geologii, Geofizyki i Ochrony Środowiska
The article focuses on the physicochemical parameters of water in streams, springs, boreholes, and intakes from the Bystre Thrust-Sheet (the Silesian Nappe, Fore-Dukla Zone), the only area in the Polish segment of the Outer Carpathians where arsenic minerals occur. These waters are characterized by the presence of arsenic, lithium, mercury, barium, strontium and usually high CO$_{2}$ concentrations. The study aimed to determine the range of the geochemical anomaly of arsenic in water. An important aspect was to determine the origin of As and link its presence with the content of ions of other chemical elements dissolved in water. The sampling points were designated based on geological maps with a particular emphasis on the occurrence of tectonic dislocations and the configuration of the river network. In the selected places 47 samples of water were taken, and various elements were determined. Then, the range of occurrence of various types of water that differed from the average concentrations of selected ions was analysed. The potential relationship between the chemical composition of water and the geology of the Bystre Thrust-Sheet was also discussed. The high concentrations of arsenic were found only in springs and boreholes. In flowing waters, these concentrations quickly decreased as due to dilution or precipitation and binding with the solid phase. Relatively high (max. 378.72μg/L) arsenic concentration, which significantly exceeded the permissible value (50μg/L), was detected in the Bystre 1 borehole. This water has a pH value of 7.85 indicating its alkaline nature. When considering water use for health purposes, it is necessary to monitor its arsenic content. The conditions prevailing in waters, mainly high pH, favour the immobilization of metals in sediments and suspended matter. The lower concentrations of arsenic in flowing waters may be attributed to the strongly calcareous nature of the Cieszyn beds which act as a natural barrier, limiting the migration of arsenic beyond the Bystre Thrust-Sheet.
Access status: Restricted ,
Charakterystyka mineralogiczna złoża As Złoty Stok
(Data obrony: 2014-09-29) Ropka, Daria
Wydział Geologii, Geofizyki i Ochrony Środowiska
This paper describes how operation in the area of Zloty Stok has been developing over the years. Geological structure and theories concerning the origin of the deposits has been charakterized on the basis of literaturę. The the studies presented in the paper have been carried out using a reflected light microscope and scanning electron microscope. Such minerals as chalcopyrite, galena, hematite, ilmenite, lelingit, magnetite, pentlandite, pyrite, rutile, sphalerite, sphene have been identified and described during the research. The paper also contains information how to currently use exploit old excavations.
Access status: Restricted ,
Eksperymentalny model przemian cerusytu $PbCO_{3}$ w hydroksylmimetyt $Pb_{5}(AsO_{4})_{3}OH$
(Data obrony: 2012-07-16) Kosobudzka, Anna
Wydział Geologii, Geofizyki i Ochrony Środowiska
Bioavailability of $Pb$ and $A$s depends strongly on thermodynamic stability of crystalline species controlling their concentration in solutions. However, the mechanisms of transformation of more soluble cerrusite $PbCO_{3}$ into less soluble lead apatites are not well understood. In this study, the concentration of aqueous $Pb^{2+}$ and formation of secondary phases were monitored during dissolution of cerrusite $PbCO_{3}$ in the presence of $AsO_{4}{ ^{3-}}$ at various pH. XRD and SEM/EDS analyses indicate that hydroksylmimetite $Pb_{5}(AsO_{4})_{3}OH$ is the only reaction product at alkaline pH. In acidic solutions the main product of cerrusite reaction with arsenate ions is more soluble and less stable shultenite $PbHAsO_{4}$. Control reaction with lead ions from $Pb(NO_{3})_{2}$ allows to determine a $CO_{3}{^{2-}}$ substitution in the structure of lead apatites precipitating in the presence of cerrusite.
Access status: Restricted ,
Ocena dokładności szacowania zasobów kobaltu oraz arsenu w złożu $Cu-Ag$ „Lubin”
(Data obrony: 2017-07-19) Płatanowicz, Filip
Wydział Geologii, Geofizyki i Ochrony Środowiska
The work presents results of study of the accuracy evaluation of cobalt and arsenic resources estimation in the part of $Cu-Ag$ „Lubin” ore deposit. Cobalt and arsenic are representatives of vast group of accompanying elements occurring in copper-silver ore. According to the previous researches, resources estimation of accompanying elements is characterized by low accuracy, which is mostly result of high variability of these elements and low density of the sampling network. In this work, accumulation index of investigated accompanying elements and copper were analyzed with statistical and geostatistical methods. As result of analyses, characteristics of these parameters variability were acquired, which in form of geostatistical models were used in polygonal kriging. Error of estimation of average values of accumulation index of investing elements is equal to the error of resources estimation of these elements within fixed area blocks. Polygonal kriging estimation of average accumulation index of cobalt and arsenic is characterized by multifold lower accuracy of estimation than the estimation of copper. However, in the comparison to results of previous researches concerning other parts of $Cu-Ag$ ore deposit, the estimation of mean values of accumulation index of cobalt and arsenic in the Lubin deposit are more accurate. It is result of less erratic variability of these resources parameters in the field of study.
Access status: Restricted ,
Sorpcja wybranych oksyanionów na naturalnych i modyfikowanych termicznie rudach darniowych
(Data obrony: 2018-12-12) Kulmaczewska, Katarzyna
Wydział Geologii, Geofizyki i Ochrony Środowiska
Celem pracy było określenie wpływu modyfikacji termicznej na zdolności sorpcyjne rud darniowych – naturalnych czwartorzędowych kopalin bogatych w tlenowodorotlenki żelaza. Analizowano próbki rud miałkich i kawałkowych pochodzące z czterech lokalizacji na Niżu Polskim. Eksperymenty wykonano na materiałach naturalnych oraz modyfikowanych przez wygrzewanie w 200 i 400°C. Wykonano badania ich właściwości powierzchniowych oraz eksperymenty sorpcji i desorpcji chromianów(VI) i arsenianów(V) w układzie statycznym. Wykonane eksperymenty wykazały związek wielkości sorpcji ze sposobem modyfikacji sorbentu. Największą efektywność sorpcji obu metali stwierdzono dla rud naturalnych i wyprażonych w 200°C, najsłabsze wyniki osiągnęły próbki wygrzewane w 400°C. Wyraźny wpływ modyfikacji na wielkość desorpcji zaobserwowano jedynie dla Cr(VI) – wraz ze wzrostem temperatury wygrzewania stopień desorpcji zmniejsza się.
Access status: Restricted ,
Wpływ na środowisko procesów wietrzenia wybranych minerałów $Fe$ i $As$ w strefie hipergenicznej w Rędzinach
(Data obrony: 2012-09-12) Kosakowski, Łukasz
Wydział Geologii, Geofizyki i Ochrony Środowiska
The active quarry of dolomitic marble is located at Rędziny, in the lower Silesia, near Kamienna Góra. A disseminated, hydrothermal polymetallic association, and in consequence of weathering the development of secondary minerals, occur in the Rędziny dolostones. The objects of this study were to evaluate the weathering process of arsenic and iron minerals, and its environmental impact. Standard mineralogical investigations (reflected light, XRD, SEMEDS and WDS analyses) were carried out for these purposes. Microscopic examination (reflected light) enabled to observe the weathering process of primary minerals. Some secondary phases were identified by XRD, and point chemical analyses (SEM, WDS). Basing on the determined concentration of arsenic in the water and field observation, it was concluded, that weathering process of arsenic and iron minerals in the quarry doesn't affect the environment in any significant way.
Access status: Open Access ,
Wstępne badania geochemii talu i arsenu w rudach Zn-Pb Górnego Śląska
(Wydawnictwa AGH, 2009) Kucha, Henryk; Rajchel, Bernadeta
Upper Silesian Zn-Pb deposits contain toxic elements, such as: thallium and arsenic. Basing on data from literature (Harańczyk 1965), factor analysis was performed for: Ag, As, Cd, Fe, Mn, Pb, S, Tl, Zn. This analysis showed that ores have to be present new minerals, which contain arsenic and thallium. Following detailed mineralogical research defined a new oxysulphide mineral - $(Fe_{1.8}Pb_{0.1}Zn_{0.1})_{2}SlO_{5}$.