Sökning: "Persulfate"

Visar resultat 1 - 5 av 7 uppsatser innehållade ordet Persulfate.

  1. 1. Electrosynthesis of persulfate and hydrogen gas with boron doped diamond as the anode material

    Kandidat-uppsats, KTH/Kemiteknik

    Författare :Sandra Shneker; Tsion Abebaw Kebede; Vera Lindbäck; [2022]
    Nyckelord :Boron-doped diamond; persulfate; flow cell; electrosynthesis; current efficiency;

    Sammanfattning : The efficiency of boron-doped diamond electrodes (BDD) has been investigated by electrolysis of an aqueous solution containing sodium sulfate. A Synthesis StarterKit from Condias was used, which contained the BDD anode with an active surface area of 3.14 cm2, and electrosynthesis was performed in a batch mode reactor. LÄS MER

  3. 2. Chemical degradation of PFAS using hydrogen peroxide and persulfate

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Jonathan Bannister; [2020]
    Nyckelord :PFOS; PFOA; PFBA; Hydrogen Peroxide; Persulfate; Degradation;

    Sammanfattning : PFAS are a group of relatively newly discovered man-made pollutants. PFAS contains a C-F bond which is one of the strongest bonds in organic chemistry. Therefore, PFAS are not easily degradable and, once release into nature, are very persistent. LÄS MER

  4. 3. Method development of total oxidizable precursor assay for perfluoroalkyl acid precursors in domestic sludge

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Lydia Söderlund; [2018]
    Nyckelord :Total oxidizable precursor assay TOP assay ; Perfluoroalkyl substances PFASs ; Perfluoroalkyl acids PFAAs ; Sewage sludge; Oxidative conversion; Organofluorine;

    Sammanfattning : Per- and polyfluoroalkyl substances (PFASs) are persistent organic pollutants used in industrial applications and are globally distributed in the environment. A group of PFASs that are difficult to measure with today’s method are perfluoroalkyl acid precursors (PFAA precursors) that, when degraded, serves as indirect sources of PFAAs. LÄS MER

  5. 4. Removal of per- and polyfluoroalkyl substances from drinking water using ozonation

    Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Miriam Dorothea Schäfers; [2017]
    Nyckelord :PFAS; drinking water; ozonation;

    Sammanfattning : Per- and polyfluoroalkyl substances (PFASs) are a broad group of man-made chemicals which are persistent, bioaccumulative and toxic. Due to their unique physicochemical properties PFASs are used in various industrial processes and consumer products. LÄS MER

  7. 5. Carboxylated Cellulose Nanocrystals Extraction from Kraft Pulp Using Ammonium Persulfate as Low Cost Source & Sustainable Method for High Quality Flexible Packaging Bio-coating

    Master-uppsats, Lunds universitet/Förpackningslogistik

    Författare :Gerald Perry Estavillo Marin; [2015]
    Nyckelord :affordable CNC extraction; high quality CNC; sustainable packaging; FT-IR; TEM; XRD; contact angle; transparency; haze; optical properties; food packaging; bio-packaging; bio-coating; plastics; PET film; polyethylene terephthalate; Kraft CNC; Kraft pulp; cotton CNC; oxygen barrier; nanocellulose crystals; ammonium persulfate; CNCs; cellulose nanocrystals; Chemistry;

    Sammanfattning : One of the leading challenges presented in 21st century for packaging industry is to address the growing environmental problems related to non-renewable flexible packaging. This leads to new growing interest in bio-based materials, among them cellulose nanocrystals (CNCs), which have already shown good performance in improving anti-fog and oxygen & water vapor barrier properties when applied to flexible film. LÄS MER