Sökning: "redox buffering"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden redox buffering.

  1. 1. Assessment of the Long-Term Transport Processes and Chemical Evolution in Waste Deposits

    Författare :Sami Bozkurt; KTH; []
    Nyckelord :Solid waste; landfill processes; transport processes; long-term; heavy metals; contaminant release; oxygen; modelling; conceptual model; pH buffering; redox buffering; final top cover; natural analogue;

    Sammanfattning : .... LÄS MER

  3. 2. A model of pH and redox buffer depletion in waste landfills

    Författare :James Crawford; KTH; []
    Nyckelord :;

    Sammanfattning : The geochemical processes governing the release of heavymetal contaminants from solid waste materials have been studiedexperimentally and modelled using a mass balance approach. Theaim of the modelling work was to develop calculation tools thatcan be used to predict the release rate of heavy metals fromwaste heaps or landfills. LÄS MER

  4. 3. Evolution of the groundwater geochemistry in sulphide bearing tailings remediated by applying till cover, Kristineberg, Northern Sweden

    Författare :Olivier Corrège; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Sammanfattning : At the Kristineberg mine in northern Sweden, sulphide-rich tailings were remediated in 1996 by applying till covers. The sulphides were isolated from the atmosphere to prevent oxidation. LÄS MER

  5. 4. Phytostabilisation : use of wetland plants to treat mine tailings

    Författare :Eva Stoltz; Maria Greger; Lena Kautsky; Marinus Otte; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Phytostabilisation; wetland plants; mine tailings; Plant physiology; Växtfysiologi;

    Sammanfattning : Mine tailings can be rich in sulphide minerals and may form acid mine drainage (AMD) through reaction with atmospheric oxygen and water. AMD contains elevated levels of metals and arsenic (As) that could be harmful to animals and plants. LÄS MER

  7. 5. Hydrothermal alteration of organic matter at spreading centers

    Författare :Eva Andersson; Bernd R.T. Simoneit; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; Biogeochemistry; biogeokemi;

    Sammanfattning : Alteration of organic matter, mainly amino acids, at sub-seafloor hydrothermal conditions has been investigated by performing laboratory experiments and by studying deep-sea sediments from hydrothermally active areas on the northern Juan de Fuca Ridge, northeast Pacific Ocean.Quaternary sediments from Middle Valley and the eastern flank of the Juan de Fuca Ridge recovered during the Ocean Drilling Program Legs 139 and 168 have been analyzed for total hydrolyzable amino acid concentrations, individual amino acid abundances and stereochemistry in order to evaluate the effects of hydrothermal stress on the decomposition of sedimentary amino acids. LÄS MER