Sökning: "Methylmercury"

Visar resultat 1 - 5 av 23 uppsatser innehållade ordet Methylmercury.

  1. 1. Newly inundated forest landscapes - hotspots for mercury in water and benthic fauna

    Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Kirstine Evald Andersson; [2023]
    Nyckelord :Wetland restoration; Inundation; Mercury cycling; Beaver impoundments; Aquatic biogeochemis-try;

    Sammanfattning : Mercury (Hg) is a widespread contaminant in high-latitude aquatic ecosystems, where it can undergo microbial transfor-mation into toxic methylmercury (MeHg). Due to its chemical properties, MeHg tends to accumulate in the aquatic food chain and will eventually end up in predatory species at the top of the terrestrial food web. LÄS MER

  3. 2. Mercury in a Swedish landscape over 30 years : a thesis on mercury concentrations in different water-cathments in Krycklan and Degerö stormyr

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

    Författare :Ted Pettersson; Isak Haglund; [2023]
    Nyckelord :Atmospheric deposition; concentrations; dissolved organic carbon; mercury; methylmercury; peatlands; water-catchments;

    Sammanfattning : The purpose of this thesis is to examine trends in concentrations of total mercury (TotHg) and methylmer¬cury (MeHg) in water streams around Vindeln, Sweden, located northwest of Umeå. The relation¬ship between dissolved organic carbon (DOC) and TotHg were also examined in this thesis. LÄS MER

  4. 3. Inhibited surface-thiols in Geobacter sulfurreducens : Mercury uptake and methylation rates

    Master-uppsats, Umeå universitet/Kemiska institutionen

    Författare :Andreas Granström; [2021]
    Nyckelord :;

    Sammanfattning : Due to daily human (anthropogenic) industrial activity, a lot of elemental mercury (Hg0) has been released to the atmosphere. The mercury can then spread globally, since mercury has the ability to remain atmospheric for up to a year. When mercury deposits, it can end up in anaerobic environments such as sediments and soil. LÄS MER

  5. 4. HgII uptake in Geobacter sulfurreducens spheroplasts : Thiols’ role in Hg partitioning and methylation

    Master-uppsats, Umeå universitet/Kemiska institutionen

    Författare :Andreas Eriksson; [2021]
    Nyckelord :;

    Sammanfattning : Mercury (Hg) is a naturally occurring trace element and pollutant that is ubiquitous in aquatic ecosystems. All Hg species are hazardous, but methylmercury (MeHg) is the most alarming due to its neurotoxicity, teratogenicity, and bioaccumulation in the food web. LÄS MER

  7. 5. Mercury and methyl mercury release in soil and water - their relationship with different properties in Skogaryd

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Linnéa Johansson; [2020-07-08]
    Nyckelord :mercury; methylmercury; demethylation; pH; dissolved oxygen and total organic content;

    Sammanfattning : In Skogaryd research site, water samples were taken and analysed for total mercury (Hgtot) and methylmercury (MeHg) concentration along with the pH, dissolved oxygen (DO) and total organic content (TOC). This to give the condition of the site before the forest is clear-cute and a part of the land rewetted to a wetland. LÄS MER