Essays about: "X-ray fluorescence spectrometry"

Showing result 1 - 5 of 8 essays containing the words 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?

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

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

    Abstract : 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. READ MORE

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

    University essay from SLU/Dept. of Soil and Environment

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

    Abstract : 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. READ MORE

  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).

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

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

    Abstract : 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. READ MORE

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

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

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

    Abstract : 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. READ MORE

  6. 5. Distortions of Press Quenched Crown Wheels

    University essay from KTH/Materialvetenskap

    Author : Benjamin Brash; [2015]
    Keywords : Press quenching; Distortions; Crown wheel; Segregation; Ingot casting; Continuous casting;

    Abstract : Scania has experienced difficulties with large variations of the slope of the back plane after press quenching of case hardened crown wheels of especially type R780 Steg supplied from ingot cast material. This leads to that a large number of crown wheels has to be remeasured and sorted according to back slope which is time consuming for operators. READ MORE