Sökning: "Mineral waters"

Visar resultat 6 - 10 av 46 avhandlingar innehållade orden Mineral waters.

  1. 6. Adsorption of dissolved organic matter in aquatic ecosystems : Effects on composition and reactivity

    Författare :Marloes M. Groeneveld; Lars Tranvik; Dolly Kothawala; Suzanne Tank; Uppsala universitet; []
    Nyckelord :dissolved organic matter; DOM; carbon; aquatic; adsorption; mineral particles; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Sammanfattning : Inland waters receive organic matter from terrestrial ecosystems and in situ production. In transit from land to the ocean, dissolved organic carbon (DOC) may be mineralised to inorganic forms (CO2 and CH4) by microbial degradation and photodegradation. LÄS MER

  3. 7. Inorganic chemistry of phosphorus cycling in fresh and marine waters

    Författare :Anneli Gunnars; René Gätcher; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; strukturkemi; Structural Chemistry;

    Sammanfattning : In the present Thesis, new results are reported on critical chemical mechanisms controlling the cycling of phosphorus in aquatic environments. These findings have implications for several fields of earth system sciences, including large-scale global change, both Recent and in older geological periods. LÄS MER

  4. 8. Flotation chemistry of complex sulphide ores : recycling of process water and flotation selectivity

    Författare :Fatai Kolawole Ikumapayi; Jaakko Leppinen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineral Processing; Mineralteknik;

    Sammanfattning : Recycling of flotation effluents through the ore processing plant is one of the ways of reducing both plant-operating costs and industrial impact onto the local ecosystem. Such waters named acid mine drainage (AMD), if discharged from sulphide flotation are gypsum (CaSO4.H2O) saturated and have a high salinity (on the order of 1000 ppm). LÄS MER

  5. 9. Recycling process water in complex sulphide ore flotation

    Författare :Fatai Kolawole Ikumapayi; Jaako Olavi Leppinen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineral Processing; Mineralteknik;

    Sammanfattning : An approach to environmental sustainability and improved process economy in sulphide minerals production is recycling of process water in flotation of complex sulphide ores. However process water chemistry may be a critical issue to flotation efficiency. Process water discharged from sulphide flotation circuits are usually gypsum (CaSO4. LÄS MER

  7. 10. Molecular and isotopic characterization of terrestrial organic carbon released to (sub-)Arctic coastal waters

    Författare :Jorien Elisabeth Vonk; Örjan Gustafsson; Jason Neff; Stockholms universitet; []
    Nyckelord :organic carbon; terrestrial biomarkers; radiocarbon; particulate organic carbon; sediments; sphagnum; Arctic; Bothnian Bay; East Siberian Sea; Kalix River; Kolyma River; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Arctic soils store half of the global soil organic carbon (OC) pool and twice as much C as is currently present in the atmosphere. A considerable part of these carbon pools are stored in permafrost. LÄS MER