Sökning: "Hg concentration"

Visar resultat 1 - 5 av 30 uppsatser innehållade orden Hg concentration.

1. 1. Hg concentration in humus soils in different Arctic and Subarctic tundra vegetation types : Including a method comparison for analyzing metals in humus soils

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

   Författare :Alice Sandvärn; [2022]
   Nyckelord :Hg concentration; vegetation types; Arctic tundra; elevation gradient; XRF;

   Sammanfattning : Heavy metals, such as mercury (Hg), have a long residence time in the atmosphere and can be transported long distances and deposited in the Arctic via wet and dry deposition. Still, there are few studies on the complex mercury cycle and how different plant groups absorb Hg. LÄS MER

3. 2. Hg concentration in humus soils in different Arctic and Subarctic tundra vegetation types : Including a method comparison for analyzing metals in humus soils

   Kandidat-uppsats,

   Författare :Alice Sandvärn; [2022]
   Nyckelord :Hg concentration; vegetation types; Arctic tundra; elevation gradient; XRF;

   Sammanfattning : Heavy metals, such as mercury (Hg), have a long residence time in the atmosphere and can be transported long distances and deposited in the Arctic via wet and dry deposition. Still, there are few studies on the complex mercury cycle and how different plant groups absorb Hg. LÄS MER

4. 3. Methods for measuring mercury in gas ebullition from fiber banks : A literature study

   Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

   Författare :Diana Jonsson; [2021]
   Nyckelord :Fiber bank; fiber rich-sediment; mercury; contaminants; gas ebullition; pulp-fiber; wood industry; paper industry; environmental toxicity; wood waste;

   Sammanfattning : Mercury contamination is an environmental issue with high priority due to its high toxicity. In addition to the atmospheric deposition, several lakes and rivers in Sweden are contaminated as a result from wood and pulp-fiber industries which stretches back 200 years. LÄS MER

5. 4. Development and Testing of a Hydro-Chemical River MixingModel to Investigate Sources of Carbon and Mercury in the Mackenzie River Basin, Canada

   Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Torbjörn-Johannes Erikson; [2020]
   Nyckelord :mercury; Hg; POC; DOC; Mackenzie River; kvicksilver; Hg; DOC; POC; Mackenziefloden;

   Sammanfattning : Mercury, Hg, is found in Arctic biota in alarming quantity, posing a potential health risk for the local population. It is believed that the large Arctic rivers contribute to this. The Mackenzie River annually transports approximately 325 km3 water to the Arctic Ocean, which is ca 10% of the freshwater received. LÄS MER

7. 5. Factors Controlling Mercury Concentration in Rivers in the Mackenzie River Basin, Northwestern Canada

   Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Jack Hewitt; [2020]
   Nyckelord :mercury; Mackenzie River Basin; regression; Canada; community-based water monitoring;

   Sammanfattning : Mercury (Hg) in rivers and streams of the Mackenzie River Basin (MRB) presents a risk to fish, aquatic mammals, and humans. This thesis makes use of newly-released water quality data, including total mercury (THg) and dissolved mercury (DHg), gathered through the NWT-Wide Community-based Water Quality Monitoring (CBM) program. LÄS MER