Sökning: "solvent extraction"

Visar resultat 11 - 15 av 129 avhandlingar innehållade orden solvent extraction.

  1. 11. Leaching and solvent extraction of rare earth metals from fluorescent lamp waste

    Författare :Cristian Tunsu; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; rare earth metals; leaching; waste treatment; solvent extraction; Cyanex 923; florescent lamp waste; recycling;

    Sammanfattning : With the rapid advancement of technology, the demand for elements such as rare earth metals (REMs) has increased considerably during the last decade. Many countries are facing problems securing sustainable supplies, a fact acknowledged in many publications. LÄS MER

  3. 12. Determination of Persistent Organic Pollutants in Solid Environmental Samples Using Accelerated Solvent Extraction and Supercritical Fluid Extraction. Exhaustive extraction and sorption/desorption studies of PCBs

    Författare :Erland Björklund; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sorption; Sediment; PCBs; Polychlorinated Biphenyls; POP; Persistent Organic Pollutants; SFE; Supercritical Fluid Extraction; Accelerated Solvent Extraction; ASE; Desorption; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Human activity is constantly causing environmental problems due to production and release of numerous chemicals. A group of compounds of special concern is persistent organic pollutants (POP). These toxic, lipophilic chemicals have a high chemical and biological stability, and tend to accumulate in the lipid phase of living organisms. LÄS MER

  4. 13. Extraction of Metal Values : Thermodynamics of Electrolyte Solutions and Molten Salts Extraction Process

    Författare :Xinlei Ge; Seshadri Seetharaman; Katsunori Yamaguchi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrolyte solutions; activity coefficient; osmotic coefficient; freezing point depression; boiling point elevation; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Over the past centuries, a number of process routes for extraction of metal values from an ore or other resources have been developed. These can generally be classifiedinto pyrometallurgical, hydrometallurgical or electrometallurgical routes. LÄS MER

  5. 14. Studies of a Synergistic Extraction System for Minor Actinides and the Chemical Properties of 2-bromodecanoic acid

    Författare :Mikael Nilsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 2 :6 ; transmutation; 2 -terpyridine; actinides; partitioning; synergistic extraction; solubility parameters; 2; lanthanides; solvent extraction; 2-bromodecanoic acid;

    Sammanfattning : .... LÄS MER

  7. 15. Selective Separation of Metal Ions by Solvent Extraction, Liquid Membranes and Magnetic Nanoparticles

    Författare :Abdusalam Uheida; Mamoun Muhammed; Olle Wahlberg; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; solvent extraction; facilitated transport; Pt IV ; Pd II ; Ph III ; permeation medelling; thermodynamic modelling; Materials chemistry; Materialkemi;

    Sammanfattning : .... LÄS MER