Sökning: "plant suspensions"

Visar resultat 6 - 8 av 8 avhandlingar innehållade orden plant suspensions.

  1. 6. Bioassays for the determination of nitrification inhibition

    Författare :Camilla Grunditz; KTH; []
    Nyckelord :;

    Sammanfattning : Requirements for nitrogen reduction in wastewater treatmentplants were introduced in Sweden in the early 1990’s. Thiswas a governmental move to reduce the nitrogen discharges tothe Baltic and Kattegatt in order to prevent eutrophication.The nitrification process in wastewater treatment plants isperformed by nitrifying bacteria. LÄS MER

  3. 7. Sorption and transformation of polar pharmaceuticals during wastewater treatment studied by hollow fiber liquid phase microextraction

    Författare :Estelle Larsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pharmaceuticals; wastewater treatment; sludge; hollow fiber liquid phase microextraction;

    Sammanfattning : This thesis addresses the application of hollow fiber liquid phase microextraction as a simple, efficient and environmentally friendly tool to study the fate of four common anti-inflammatory drugs (ketoprofen, naproxen, diclofenac and ibuprofen) during wastewater treatment. Initial experiments verified that this technique is applicable on aqueous as well as suspensions of solid samples, thus greatly simplifying the sample preparation. LÄS MER

  4. 8. Nuclear magnetic resonance studies on bentonite in complex mixed systems

    Författare :Alexander S. Goryan; Willis Forsling; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bentonite; montmorillonite; 23Na; 31P; 29Si NMR; interaction; ion exchange; sorption; Chemistry of Interfaces; Gränsytors kemi;

    Sammanfattning : In this work 23Na MAS NMR was validated as a successful quantitative method for studies of exchanging sodium in bentonites useful, in particular, for studies of ion-exchange kinetics. Na-enriched bentonites equilibrated in a re-circulated process water at iron-oxide pelletizing plants may acquire properties of Ca-bentonites after already 20 minutes of the equilibration time, since >50 % of sodium ions will be exchanged by calcium ions during first minutes of bentonite placed in contact with the process water. LÄS MER