Sökning: "OC flux"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden OC flux.

  1. 1. Provenance, transport, and the fate of organic matter and sediments drained through Himalayan Rivers in Nepal

    Författare :Rajendra Bhandari; Joyanto Routh; Subodh Sharma; Åsa Danielsson; Rajendra Joshi; Mead Allison; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Himalayan rivers; Biomarkers; Isotopes; OC flux; RUSLE; Himalayafloder; biomarkörer; isotoper; OC flux; RUSLE;

    Sammanfattning : Despite its small area (ca. 595,000 km2), the Himalayan region transfers disproportionally high amounts of sediments and organic matter (OM) through a network of rivers into the oceanic sink. LÄS MER

  3. 2. The role of sediments in the carbon cycle of boreal lakes

    Författare :Hannah Elisa Chmiel; Sebastian Sobek; James Cotner; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Inland waters are active sites of carbon (C) processing and emitters of carbon dioxide (CO2) and methane (CH4) to the atmosphere. In the boreal zone, where surface waters receive large quantities of organic carbon (OC) from surrounding forests and wetlands, lakes and streams act as strong sources of these greenhouse gases. LÄS MER

  4. 3. Transport, degradation and burial of organic matter released from permafrost to the East Siberian Arctic Shelf

    Författare :Lisa-Marie Bröder; Örjan Gustafsson; Tommaso Tesi; Elizabeth Canuel; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organic carbon; marine sediments; East Siberian Sea; Laptev Sea; cross-shelf transport; degradation rate constants; carbon isotopes; terrestrial biomarkers; HMW wax lipids; lignin phenols; compound-specific radiocarbon analysis; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Permafrost soils in the Arctic store large quantities of organic matter, roughly twice the amount of carbon that was present in the atmosphere before the industrial revolution. This freeze-locked carbon pool is susceptible to thawing caused by amplified global warming at high latitudes. LÄS MER

  5. 4. Nanocellulose based affinity membranes for water purification: Processing technologies for optimal adsorption of dyes and metal ions

    Författare :Zoheb Karim; Monica Ek; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Trä och bionanokompositer; Wood and Bionanocomposites;

    Sammanfattning : The aim of current study was to fabricate high flux affinity membrane with mechanical stability, porosity and high functionality for capturing of contaminants (dyes and metal ions) from water. Cellulose nanocrystals (CNCSL) and cellulose nanofibers (CNFSL) as well as a special grade of cellulose nanocrystals (CNCBE) isolated following bioethanol pilot scale process were used for the membrane fabrication. LÄS MER

  7. 5. Alkali Uptake and Release from Oxygen Carriers in Chemical Looping Applications: Development and Application of Reactor Systems and Measurement Techniques

    Författare :Viktor Andersson; Göteborgs universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alkali speciation; Biomass; Chemical looping combustion; Oxygen carriers;

    Sammanfattning : Chemical looping combustion (CLC) of biomass is a heat and power generation technology with minimal associated costs for carbon capture, potentially resulting in negative CO2 emissions. The CLC technology utilizes fluidized beds of oxygen carrier (OC) particles to separate CO2 from the combustion air. LÄS MER