Repository logo

Browsing by Subject "granulometry"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Analiza granulometryczna pyłów drogowych i badanie zawartości cynku w poszczególnych frakcjach
    (Data obrony: 2014-09-25) Skrzypowska, Katarzyna
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    This dissertation presents the results of analyses on the particle size distribution and zinc content in street dusts from 3 May Alley (PD) and parking dusts from the Campus of University of Science and Technology (PP) in city of Cracow. The purpose of researches was to determine the impact of communication on the state of urban environment, by presenting the level of Zn contamination in separated dust fractions. According to results, PD are more fine-grained, contain about 2,5 times more fraction < 63 ?m than PP. In this fraction occurred the highest concentration of Zn, from 1054 to 1216 mg/kg (PP) and from 685 to 858 mg/kg (PD).There was observed a relatively higher level of Zn contamination in dusts from parking lots, but by analyzing the load, a street dusts put into the environment more zinc in form of smallest, most dangerous particles. The biggest load of Zn (39,9%) introduced fraction < 63 ?m in street dusts and fraction 200-1000 ?m in parking dusts. There is also a significant effect of transport on Zn content in soils and vegetation, together with the distance from the May 3 Alley Zn content is reducing.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zmienność litologiczna osadów ilasto-krzemionkowych z obszaru IOM (strefa rozłamowa Clarion-Clipperton; E Pacyfik)
    (Wydawnictwa AGH, 2011) Maciąg, Łukasz; Kotliński, Ryszard A.; Borówka, Ryszard K.
    Authors presented geospatial variability of selected sedimentological, mineralogical and diagenetical features of clayey-siliceous sediments from Interoceanmetal deposit area (eastern Pacific, Clarion-Clipperton fracture zone). Changes of environmental conditions essential to geological and palaeogeographical situation into C-C zone, and also their importance to forming processes of Fe/Mn oxide concentrations have been described. Research studies on sediments, classified to the uppermost part of Clipperton FCl IV Formation (pliocene-holocene), show unimodal distribution of samples, poor sorting and mean grain size of siliceous clayey muds amount to x = 6,83 phi. Some qualitative/quantitative changes into the mineral composition of the clay 0,004 / 0,002 mm subfractions (clay minerals from kaolinite/illite/chlorite/smectite groups), perpendicular variability of some Radiolaria/Diatomeae species and also micronodules amount depletion during burial processes have been confirmed. Environmental conditions into the C-C zone enable to form economically attractive depositional fields covered by polymetallic nodules that constitute potential ore sources of Mn, Ni, Co, Cu and other metals in the future.