Sökning: "Biogeochemistry"

Visar resultat 16 - 20 av 20 uppsatser innehållade ordet Biogeochemistry.

  1. 16. Frigörelse av kvicksilver och metylkvicksilver till bäckvatten under olika perioder efter skogsavverkning

    L3-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Mattias Björkman Westin; [2008]
    Nyckelord :mercury; methyl mercury; forestry; clear cutting; iron; sulpher;

    Sammanfattning : High levels of Hg in fish in Swedish lakes have been a problem along time in Sweden. The major concern is production and accumulation of the most toxic form of mercury; methyl mercury (MeHg). LÄS MER

  3. 17. Modeling Chloride Retention in Boreal Forest Soils - synergy of input treatments and microbial biomass

    Magister-uppsats, Tema vatten i natur och samhälle

    Författare :Stephen Kayode Oni; [2007]
    Nyckelord :Biogeochemical model; Chlorine biogeochemistry; Chlorine cycles; Chloride immobilization; Microbial Biomass; Water residence time;

    Sammanfattning : The hypothetical assumption that chloride is conservative in the soil has been debated for the last decade. The results of the recent years of study in chlorine biogeochemistry show that chloride is non-conservative but rather participates in complex biogeochemical reactions in the soil. LÄS MER

  4. 18. Modelling Chlorine Transport in Temperate Soils

    Magister-uppsats, Tema vatten i natur och samhälle

    Författare :Olatunde Idris Ibikunle; [2007]
    Nyckelord :Hydrochemical model; chlorine biogeochemistry; microbial retention and oxygen;

    Sammanfattning : Microbes have been suggested to have a strong impact on the transportation of chlorine in soils. There are speculations about environmental factors limiting microbial effect on chlorine movement and retention. LÄS MER

  5. 19. A laboratory study on the immobilisation of inorganic chlorine in soil

    Magister-uppsats, Institutionen för tema

    Författare :Frida Thomsen; [2006]
    Nyckelord :Chlorine; soil horizons; LSC; oxic; anoxic; 36Cl; natural processes; forest soil;

    Sammanfattning : Inorganic chlorine (Clinorg) is generally considered to be inert and has been used as a tracer for groundwater movements. This assumption is thereby fundamental for current knowledge about soil biogeochemistry. However, recent work showed that Clinorg can be retained, i.e. LÄS MER

  7. 20. Simulation of Selenium Remobolisation and cycling in sediment

    Master-uppsats, KTH/Industriell ekologi

    Författare :Erik Palm; [1997]
    Nyckelord :Modelling; selenium; biogeochemistry; bioturbation; sediment; pollutant fate; Lake Macquarie;

    Sammanfattning : Lake Macquarie is the largest estuarine lake in New South Wales and is located on the eastern seaboard of Australia, approximately 85 km north of Sydney.The study of heavy metal concentrations in surficial sediments, sediment cores, seagrasses and fish conducted by the New South Wales Department of Mines in 1974 revealed that significant heavy metal contamination of Lake Macquarie has occurred. LÄS MER