Sökning: "X-ray fluorescence spectrometry"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden X-ray fluorescence spectrometry.

  1. 1. Aluminum levels in the O-horizon of soils near Sundsvall, Sweden : Are levels of Al elevated due to smelter emission?

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Mattias Sundin; [2023]
    Nyckelord :Aluminium; Smelter emissions; O-horizon; Al concentration; Scots’ pine needles;

    Sammanfattning : Aluminum (Al) is a potentially toxic element for humans, animals, and plants. Al emitted from smelter plants is one source of Al that may be responsible for increased exposure to humans and the environment. LÄS MER

  3. 2. Carbonaceous aerosols and trace metal deposition in high-latitude snow : a comparative study in Sweden and Alaska

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Anika Pinzner; [2019]
    Nyckelord :PM; carbon particles; pXRF; arctic; subarctic; EC OC; LAHM; PSAP; TOT; ICP-MS; filter; contamination; albedo;

    Sammanfattning : This study investigates the advantages and disadvantages of several destructive and non-destructive analytical methods that can be employed to characterize airborne par-ticulate matter (PM) deposited in seasonal snow. To this end, a comparative study was conducted on PM obtained from snowpack surveys in two Arctic/subarctic regions of Northern Sweden and Interior Alaska, USA. LÄS MER

  4. 3. Sedimentation in a small lake, more complex than previously assumed. : Bathymetrical and geochemical sediment analyses in Kassjön (63°55´ N, 20°01´ E).

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Viktor Gydemo Östbom; [2017]
    Nyckelord :Kassjön; Sedimentation; Element distribution; Small lake; Bathymetry; X-ray fluorescence spectrometry;

    Sammanfattning : For studies using lake sediments as a medium, understanding factors governing sediment distribution and properties is crucial for making accurate interpretations and conclusions. General lake sedimentation theory is however mainly based on larger lakes and systems, potentially leading to biased sampling and data interpretation when applied on a smaller system. LÄS MER

  5. 4. Lake condition changes of a boreal lake over the past ca. 6500 years based on varve geochemistry

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Jora Ligtenberg; [2017]
    Nyckelord :varved lake sediment; total element concentrations; biogenic silica; lake-water organic carbon; Holocene;

    Sammanfattning : The purpose of this study was to assess changes in the in-lake conditions of lake Kassjön, northern Sweden, in response to environmental and climate changes over the past ca. 6500 years. LÄS MER

  7. 5. Mosslik och kärrskelett : Analys av torv från ett skelett utgrävt vid offersjön Bokaren

    Kandidat-uppsats, Stockholms universitet/Arkeologiska forskningslaboratoriet

    Författare :Markus Eklund; [2016]
    Nyckelord :tafonomi; diagenes; våtmark; järnålder;

    Sammanfattning : This paper examines peat that was discovered next to a skeleton dug out in wetlands next to lake Bokaren in Uppland, Sweden, in 2015. The skeleton was that of a man from the Roman Iron Age. It was found in fen peat, where soft tissue decomposes but bones are often well preserved. LÄS MER