Search for dissertations about: "chelating agents."

Showing result 1 - 5 of 20 swedish dissertations containing the words chelating agents..

2. 1. Fundamental Characterization and Technical Aspects of a Chelating Surfactant

   Author : Ida Svanedal; Håkan Edlund; Magnus Norgren; Krister Holmberg; Mittuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; chelating surfactant; DTPA based surfactant; pH-responsive; characterization; surface tension; NMR diffusometry; conditional stability constants; interaction parameter; ion flotation;

   Abstract : The purpose of this study was to investigate the fundamental characteristics of a chelating surfactant in terms of solution behaviour, chelation of divalent metal ions, and interaction in mixtures with different foaming agents and divalent metal ion, as well as examining its prospects in some practical applications. Chelating surfactants are functional molecules, with both surface active and chelating properties, which are water soluble and therefore suitable for chelation in many aqueous environments. READ MORE

4. 2. Selective Separation Of Wood Components In Internal Process Waters Originating From Mechanical Pulping

   Author : Dariusz Zasadowski; Magnus Norgren; Bjarne Holmbom; Mittuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; flotation; foaming agents; chelating surfactant; TMP process water; pitch control; internal cleaning stage; hemicellulose recovery; anti‐solvents; solvents; precipitation;

   Abstract : Dissolved and Colloidal substances (DSC) and metals are released from woodduring thermomechanical pulp (TMP) production. These components have atendency to accumulate in process waters, as the water circulation systems inintegrated paper mills are closed. READ MORE

5. 3. REMOVAL OF LIPOPHILIC EXTRACTIVES AND MANGANESE IONS FROM SPRUCE TMP WATER BY FLOTATION

   Author : Dariusz Zasadowski; Magnus Norgren; Anna Sundberg; Mittuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Flotation; Foaming agents; Chelating surfactant; TMP process water; Pitch control; Internal cleaning stage;

   Abstract : Dissolved and Colloidal substances (DisCo) and metals are released from wood during thermomechanical pulp (TMP) production. The mechanical treatment causes that these components have a tendency to accumulate in process waters, as the water circulation systems in integrated paper mills are being closed. READ MORE

6. 4. Investigations on chelating agents for the extraction of lanthanide and actinide elements

   Author : David Dyrssen; Stockholms högskola; []
   Keywords : ;

   Abstract : .... READ MORE

7. 5. Organic complexing agents for remediation of heavy metal contaminated soil

   Author : Zandra Arwidsson; Bert Allard; Mats Åström; Örebro universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; soil washing; heavy metals; chelators; recycling; NATURAL SCIENCES; NATURVETENSKAP; Environmental chemistry; Miljökemi; Enviromental Science; Miljövetenskap;

   Abstract : Soil washing of heavy metal contaminated soil may be enhanced by the addition of synthetic chelators. Since many of these chelators may imply stress to soil organisms and are poorly biodegraded, identification and evaluation of effective biodegradable or recyclable chelators (synthetic and/or naturally produced) is of great interest. READ MORE