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Browsing by Subject "phosphate"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Geochemical mapping in the area of L’ubietová, Slovak Republic
    (Wydawnictwa AGH, 2012) Giera, Alicja
    L’ubietová is a village in the Banska Bystrica Region in the Slovak Republic. There is an old mining spot in its vicinity, where copper was extracted from the Bronze Age to the 19th century. Currently, the region is interesting by mineral collectors due to a p that can be found there, called libethenite. According to the literature (Kod?ra 1990, Ďud'a & Pauliš 2002) there are two areas of copper mineralization near L’ubietová, which differ in the occurrence of copper compounds formed with arsenic and phosphorus.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Lanthanum substitution enhances the intrinsic phosphate-adsorption capacity of hydrated ferric oxide via increasing Fe electron density
    (2025) Xiaohui Wang; Xue Li; Yifei Teng; Junyu Lang; Lizhi Zhang; Mingce Long
    Wydział Inżynierii Metali i Informatyki Przemysłowej
    This study analysed the content of selected antimicrobials agents (AAs), microplastics (MP), hydroxyl derivatives of polycyclic aromatic hydrocarbons (OH-PAHs) in stabilized sewage sludge and fertilizers produced from them. Eighteen AAs were identified and quantified in both sewage sludge and fertilizer samples using the LC-MS/MS method. The highest concentrations, exceeding 3000 μg kg⁻¹ , were found for sulfasalazine, clindamycin, ketoconazole and its deacetylated form, azithromycin, and desmethylated azithromycin. While the fertilizer production process successfully reduced the number of AAs present, 20 compounds persisted, with five exceeding 1000 μg kg⁻¹ , posing potential environmental concerns. The FTIR method revealed an average MP content of 2429 ± 758 fractions in stabilized sewage sludge. Both black and colored microplastic fragments were detected, with an average of 1070 and 665 particles, respectively. These findings suggest that microplastic contamination remains an issue even after sewage sludge stabilization. GC-MS/MS analysis identified six OH-PAHs in sewage sludge and fertilizer samples. In stabilized sewage sludge, concentrations ranged from 53 μg kg⁻¹ (2-Hydroxyfluorene) to 587 μg kg⁻¹ (1-Hydroxynaphthalene), while in fertilizers, values ranged from 4.7 μg kg⁻¹ (2-Hydroxynaphthalene) to 31 μg pkg⁻¹ (1-HydroxyPyrene). The fertilizer production process effectively removed 46 % to 88 % of OH-PAHs, with 3-OH-BaP levels falling below detection limits. Despite the effectiveness of the fertilizer production process in reducing several contaminants (e.g., sulfamethoxazole, metronidazole, trimethoprim, pyrazinamide, sulfadiazine, delamanid, and piperacillin), certain pollutants, including clindamycin and ketoconazole, persisted. Additionally, the economic analysis of the annual profitability of processing sewage sludge into a fertilizer product was performed. The estimated costs and profits were taken into account. This analysis indicates that the total annual income from the operation of the installation will amount to USD 233,300. However, further research is needed to fully investigate and develop this method in reference to Circular Economy management.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Opracowanie hydrotermalnej syntezy libetenitu
    (Data obrony: 2018-02-01) Bartnik, Konrad
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    Libetenit Cu2PO4OH jest końcowym członem szeregu izomorficznego minerałów wtórnych tworzących się w strefach utlenienia złóż miedzi. W tej pracy opracowano metodę hydrotermalnej syntezy libetenitu. Eksperyment został przeprowadzony przez krystalizację z roztworu w podwyższonej temperaturze i ciśnieniu. Roztwór o pH=2.9 zawierający Cu(NO3)H2O i (NH4)H2PO4 w proporcjach molowych zgodnych ze stechiometrią libetenitu zamknięto w teflonowych pojemnikach o pojemności 30 ml i umieszczono w autoklawie w temperaturze 120° C na 17 godzin. Wynikiem syntezy są widoczne okiem nieuzbrojonym ciemnozielone kryształy o połysku diamentowym. Przeprowadzone analizy przy użyciu dyfraktometrii rentgenowskiej, spektroskopii Ramana i mikroskopii skaningowej wykazały, że czysty i krystaliczny produkt syntezy jest zgodny z materiałem wzorcowym opisywanym w literaturze. Opracowana metodyka syntezy może być użyta do modelowych eksperymentów nad odtworzeniem mechanizmów powstawania libetenitu naturalnego.