Sökning: "210Pb"

Visar resultat 1 - 5 av 13 uppsatser innehållade ordet 210Pb.

  1. 1. Avsättning av Black Carbon i sediment från Odensjön, södra Sverige

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Edward Allison; [2022]
    Nyckelord :Black Carbon; BC; Odensjön; flux; CTO-375; chemo-thermal oxidation; Earth and Environmental Sciences;

    Sammanfattning : Black Carbon är resultatet av ofullständig förbränning av fossila bränslen och biomassa. Partiklarna blir luftburna i samband med förbränning och sprids över hela jorden. Utsläpp och spridning av BC är problematiskt, eftersom partiklarna har stor påverkan på människors hälsa och miljön. LÄS MER

  3. 2. Preliminary Investigation into Quantitation of Pharmaceuticals in Lake Victoria Sediments : Development of a Method for Analysis of 11 Pharmaceuticals

    Master-uppsats, Linköpings universitet/Tema Miljöförändring

    Författare :Robert Lundberg; [2021]
    Nyckelord :Lake Victoria; pharmaceutical; sediment; core; ASE; SPE; derivatization; GC-MS MS; GC-MS; 210Pb;

    Sammanfattning : Although Lake Victoria is threatened by pollution there is a lack of knowledge about pharmaceuticals contaminants drained into the lake from large cities bordering the lake. Hence, the purpose of this project was to develop, validate and apply a method for analysis of pharmaceutical compounds accumulating in the Lake Victoria sediments. LÄS MER

  4. 3. Odensjön - A new varved lake sediment record from southern Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Hanna Hertzman; [2021]
    Nyckelord :Varved lake sediment; late Holocene; organic sediments; diatoms; land-use history; southern Sweden; palaeolimnology; Earth and Environmental Sciences;

    Sammanfattning : Annually laminated (varved) sediments provide opportunities to reconstruct climate change and human impact on the environment with high temporal resolution. Depending on the character of the varves, such sediments can provide insight into the delivery of both autochthonous and allochthonous material from the lake and its catch- ment and answer questions regarding both regional and local responses to climate- and land-use changes. LÄS MER

  5. 4. The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating.

    Kandidat-uppsats,

    Författare :Nora Spjut; [2020]
    Nyckelord :Permafrost thaw; 210Pb dating; and Dwarf shrub roots;

    Sammanfattning : At this moment there is a gap in information regarding the affect roots might have on 210Pb distribution in peat cores and in turn the obtained chronologies by 210Pb dating. Therefore, four peat cores were collected from the snow manipulation study site within the mire complex Storflaket (68°20048″N, 18°58016″E). LÄS MER

  7. 5. Dating lake bottom sediment by searching for 210Pb using gamma-ray spectroscopy

    Kandidat-uppsats, Uppsala universitet/Tillämpad kärnfysik

    Författare :William Bäckström; [2020]
    Nyckelord :sediment dating; dating; spectroscopy; gamma-ray; nuclear; lead; HPGe detector; sedimentation; sedimentation rate; attenuation; migration; limnologist; least squares;

    Sammanfattning : In a collaboration with limnologists at Uppsala University a planar HPGe detector has been used to find 210Pb in lake bottom sediment in hopes of getting an estimation for the sedimentation rate. Using a least squares fit to the data, the sedimentation rate was calculated to 0.08 ± 0. LÄS MER