Sökning: "dissolved organic carbon DOC"

Visar resultat 36 - 40 av 70 avhandlingar innehållade orden dissolved organic carbon DOC.

1. 36. Association of hydrophobic organic compounds to organic material in the soil system

   Författare :Silviu-Laurentiu Badea; Mats Tysklind; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; HOCs; Organic Matter; Clay; DOM; Environmental Science; miljövetenskap;

   Sammanfattning : Contaminated soils and sediments have been identified as significant secondary sources of organic contaminants.  Leaching tests may be useful tools to estimate the mobility of contaminants via the water phase and thereby the risk for groundwater and surface water contamination. LÄS MER

3. 37. Virus Fate and Transport in Groundwater : Organic matter, uncertainty, and cold climate

   Författare :Jean-Marc Mayotte; Keven Bishop; Stephan Köhler; Fritjof Fagerlund; Sven Halldin; Constantinos V. Chrysikopoulos; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; managed aquifer recharge; organic matter; virus; numerical modeling; uncertainty; Hydrology; Hydrologi; Mikrobiologi; Microbiology;

   Sammanfattning : Water managers must balance the need for clean and safe drinking water with ever-increasing amounts of waste-water. A technique for treating and storing surface water called “managed aquifer recharge” (MAR) is frequently used to help maintain this balance. LÄS MER

4. 38. Compositional clues to sources and sinks of terrestrial organic matter transported to the Eurasian Arctic shelf

   Författare :Emma Karlsson; Örjan Gustafsson; Volker Brüchert; Thorsten Dittmar; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organic carbon; degradation; microcosm; incubation; terrestrial biomarkers; acyl lipids; lignin phenols; radiocarbon; Eurasian Arctic shelf; East Siberian Sea; Laptev Sea; Lena River; colloidal matter; particulate matter; sedimentary matter; Applied Environmental Science; tillämpad miljövetenskap;

   Sammanfattning : The amount of organic carbon (OC) present in Siberian Arctic permafrost soils is estimated at twice the amount of carbon currently in the atmosphere. The shelf seas of the Arctic Ocean receive large amounts of this terrestrial OC from Eurasian Arctic rivers and from coastal erosion. LÄS MER

5. 39. Spatial variation of dissolved organic carbon along streams in Swedish boreal catchments

   Författare :Johan Temnerud; Kevin Bishop; Bert Allard; Rolf Vogt; Örebro universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical geography and sedimentology; spatial variation of stream water chemistry; Naturgeografi och sedimentologi; Physical geography; Naturgeografi; Enviromental Science; Miljövetenskap;

   Sammanfattning : Denna avhandling behandlar den småskaliga rumsliga variationen av löst organiskt kol (DOC, engelsk term: dissolved organic carbon), dess koncentration, masstransport och karaktär, i bäckar inom två barrskogsbeklädda avrinningsområden (delavrinningsområden 0,01-78 km²). Provtagningen gjordes uppströms och nedströms varje bäckförgrening under sommarbasflöde. LÄS MER

7. 40. Nutrient and Organic Matter Dynamics in Beech Forest Floors, in Relation to the Presence of Ground Flora

   Författare :Frida Andréasson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bioavailability; mineralisation; soil acidity; soil matrix solution; soil leachate; nitrate; ammonia; dissolved organic carbon; beech; Ground flora; forest floor; O horizon; A horizon; Plant ecology; Växtekologi;

   Sammanfattning : The objective of this thesis was to quantify differences between adjacent patches with and without ground flora of Deschampsia flexuosa L. Trin or Anemone nemorosa L. in two acid European beech (Fagus sylvatica L.) forest floors in south-west of Sweden. LÄS MER