Manecki, Maciej
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nauki o Ziemi i środowisku
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Item type:Article, Access status: Open Access , Metavolcanics of Nordenskiöld Land from SW Svalbard as an example of new ocean crust(Wydawnictwa AGH, 2012) Gołuchowska, Karolina; Barker, Abigail; Manecki, Maciej; Majka, Jarosław ; Czerny, JerzyThis study concerns late Neoproterozoic metavolcanics from southwestern Svalbard in an investigation to trace the evolution of oceans plate rifting.Item type:Article, Access status: Open Access , Halogen substitution in synthetic lead apatite compounds Raman spectroscopy study(Wydawnictwa AGH, 2014) Witkowska, Małgorzata; Motyka, Joanna; Kwaśniak-Kominek, Monika; Manecki, MaciejMimetite $Pb_{10}(AsO_{4})_{6}Cl_{2}$, vanadinite $Pb_{10}(VO_{4})_{6}Cl_{2}$ and pyromorphite $Pb_{10}(PO_{4})_{6}Cl_{2}$ are minerals isostructural with apatite occurring in the oxidation zones of Pb deposits. They exhibit hexagonal structure and rod-shape morphology.Item type:Article, Access status: Open Access , Aqueous cadmium removal by hydroxylapatite and fluoroapatite(Wydawnictwa AGH, 2012) Matusik, Jakub; Bajda, Tomasz; Manecki, MaciejReducing the bioavailability of toxic heavy metals in groundwaters and urban soils by phosphate addition is an effective technique described in the literature. It is based on the reaction between metal ions and phosphates and results in the precipitation of metal substituted phosphate phases. The formed phosphates are highly insoluble and thermodynamically stable over almost entire pH and Eh range. In the presented study the efficiency and mechanism of cadmium uptake by synthetic hydroxylapatite and natural fluoroapatite was examined within the pH range of 3-7 for different reaction times (2—1440 hours). The solids after reactions were characterized by XRD and SEM-EDS. Percentage reduction of cadmium concentration in the experiments with fluoroapatite and hydroxylapatite, regardless of pH, did not exceed 17% and 25%, respectively. Cadmium uptake from the solution mainly resulted from the formation of cadmium phosphates and/or Ca-Cd phosphate solid solutions on the apatites surface. The release rate of phosphate ions by hydroxylapatite was relatively high. This promoted crystallization of a large number of small crystals. In turn dissolution of fluoroapatite was slower and thus the formation of large crystals was observed. There was no clear evidence for cadmium-calcium ion-exchange mechanism.Item type:Article, Access status: Open Access , Removal of REE and Th from solution by co-precipitation with Pb-phosphates(2023) Sordyl, Julia; Staszel, Kacper; Leś, Mikołaj; Manecki, Maciej
Wydział Geologii, Geofizyki i Ochrony ŚrodowiskaThe supply of technologically important rare earth elements (REE) is a concern in Europe, hence the recovery of REE from alternative sources has recently become widely investigated. One of the problems is the lack of cost-effective technologies for REE recovery from leaching solutions. The present work investigated the potential for recovering REE and Th from leaching solutions by co-precipitation with Pb phosphates. A set of four experiments were conducted using analytical reagent grade chemicals to analyze the effects of Pb and different pH on the efficiency of REE and Th removal from aqueous solutions. After selecting the best conditions, two additional experiments were performed using solutions obtained from leaching REE-rich apatite mine waste. The precipitates resulting from the experiments as well as the solutions before and after precipitation were analyzed. It was found that the formation of a crystalline mixture of REE- and Th- enriched pyromorphite, $Pb_{5}(PO_{4})_{3}Cl$, and Pb-phosphates, about which little has been known so far, was responsible for complete (>99%) removal of REE and Th from aqueous solutions at pH 4 and 6. At lower pH, the removal is incomplete except for Sc and Th, which probably form a distinct phases. Besides that, no fractionation of LREE and HREE was observed. The experiments included the study of solutions resulting from the leaching of REE-rich apatite waste, which may contribute to the development of new technologies for REE recovery from wastes.Item type:Article, Access status: Open Access , Assesment of contamination of water and sediments in the Wilga River, Poland(Wydawnictwa AGH, 2014) Puławska, Aleksandra; Puzio, Bartosz; Polewka, Mariusz; Manecki, MaciejThe Wilga River, one of the dextral tributaries of the Wisła, is one of the most polluted rivers in Kraków region. In the middle section it drains the Swoszowice region which is known for the natural mineral spring waters that are rich in sulphides, bicarbonates, calcium and magnesium. In the lower section of the Wilga valley an extensive, old dumps of soda factory are located.Item type:Article, Access status: Open Access , New evidence for high-pressure metamorphic rocks in Western Svalbard(Wydawnictwa AGH, 2012) Kośmińska, Karolina; Majka, Jarosław ; Krumbholz, Michael; Klonowska, Iwona; Manecki, Maciej; Czerny, JerzyDuring a field expeditions to Nordenskiöld Land and Wedel Jarlsberg Land (western Svalbard), previously unrecognised high-grade metamorphic rocks were observed. These rocks are represented by blueschists <i>sensu stricto</i> and blueschist facies metapelites.Item type:Article, Access status: Open Access , The Baklia Fault Zone - a regional strike-slip zone splitting Prins Karls Foreland (Svalbard)(Wydawnictwa AGH, 2016) Ziemniak, Grzegorz; Czerny, Jerzy; Manecki, Maciej; Kośmińska, KarolinaPrins Karls Foreland (PKF) is a westernmost island of Svalbard Archipelago belonging to the Southwestern Basement Province.Item type:Article, Access status: Open Access , Synthesis and mineralogical characteristics of hydroxylapatite-hydroxylpyromorphite solid solution series Ca5(PO4)3OH–Pb5(PO4)3OH(Wydawnictwa AGH, 2015) Motyka, Joanna; Oknińska, Joanna; Manecki, MaciejLead is a widespread environmental contaminant toxic to living organisms. Soils and wastes contaminated with Pb are found in both rural and urban settings.Item type:Article, Access status: Open Access , CO2-brine-rock interactions as a result of long term experiment onto rock samples from Chabowo anticline, Poland(Wydawnictwa AGH, 2013) Wdowin, Magdalena; Tarkowski, Radosław; Manecki, MaciejThe presented work concerns investigations of $CO_{2}$-brine-rock interactions conducted over a period of 20-months. Experiments were carried out at laboratory scale with the use of equipment specifically designed for this purpose. Research materials (reservoir and cap rocks) were taken from the Chabowo 3 well located within Chabowo anticline. The experiments were carried out at room temperature (about 25°C) and pressure about 6 MPa. For samples before and after the experiment a numerous investigations were carried out i.e. petrophysical (porosity, surface area, threshold diameter, average capillary, framework and bulk densities) and petrological-mineralogical characteristics. Also brine used for examination before and after experiment was analyzed (chemical analysis). Petrophysical results have shown a significant decrease of porosity (from 17.0% to 7.5%) and surface area (from 0.395 m$^{2}$/g to 0.196 m$^{2}$/g) in case of sandstone. These changes are caused probably by crystallization of halite in pore spaces, because mineralogical analysis (XRD) has shown the presence of halite (3-5% vol. in the rock) after experiment. More detailed results were obtained during mineralogical analyses of thin sections. These results have shown in sandstone samples a small increase of porosity and a small decrease of feldspar and cements (carbonate and clay) as well as matrix which suggests dissolution of these constituents. For clay stone - after experiment XRD clay fraction has shown absence of clay minerals such as montmorillonite, which may also be caused by interaction between the rock, $CO_{2}$ and brine. Dissolution of some minerals is evidenced by chemical analysis of brine where amounts of most tested ions increase after experiment for both sandstone and claystone.Item type:Article, Access status: Open Access , Dissolution of mimetite Pb5(AsO4)3Cl in malic acid solutions(Wydawnictwa AGH, 2012) Turek, Piotr; Bajda, Tomasz; Manecki, MaciejPentavalent arsenic and lead are presently considered to be one of the major soil pollutants. Theseand widespread elements t occur in very low concentrations. Their natural concentrations in soils and waters are the results of leaching from rocks containing Pb and As(V) minerals. However, concentration of these elements in environment can be drastically raised by anthropogenic processes, such as coal combustion, mining, metallurgy, pesticides application or glass manufacturing. Leaching of Pb and As(V) from soils and residues containing lead arsenates may cause contamination of the pedosphere.
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