Sökning: "activated carbon"

Visar resultat 11 - 15 av 157 avhandlingar innehållade orden activated carbon.

1. 11. Carbon monoxide in biological systems : An experimental and clinical study

   Författare :Anna-Maja Åberg; Jan-Erik Larsson; Dick Delbro; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Carbon monoxide; physiological effects; systemic inflammation; analytical method; blood; exhaled air; pharmacokinetics; cigarette smoking; blood donation; cytokines; Anaesthetics; Anestesiologi;

   Sammanfattning : Background: Carbon monoxide (CO) is a toxic gas, but it is also produced endogenously when haem is degraded. When produced in vivo, CO is believed to have positive biological effects. For example it activates the production of cyclic guanosine mono-phosphate and causes vasodilatation. LÄS MER

3. 12. Carbon utilisation for extended nitrogen removal and resource savings

   Författare :Tobias Hey; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; primary sludge hydrolysis; carbon source; energy; resources; denitrification; environment; economy; volatile fatty acids; multiple pH point titration; wastewater treatment; activated sludge simulation.;

   Sammanfattning : A full-scale in-line primary sludge hydrolysis experiment was conducted in one out of four primary settlers at the Klagshamn Wastewater Treatment Plant (WWTP) to test if the wastewater quality can be improved in terms of providing easily accessible carbon for possible pre-denitrification and the reduction of external carbon sources. The amount of easily accessible carbon produced, in the form of the volatile fatty acid (VFA), alkalinity and ammonium concentrations, was measured throughout the entire full-scale experiment at the outlet of the hydrolysis tank and that of the ordinary primary settler, which served as a reference line. LÄS MER

4. 13. Partial renewal of granular activated carbon filters for improved drinking water treatment

   Författare :Nashita Moona; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biofiltration; Drinking water treatment; Spectroscopic properties; Granular activated carbon filter; Natural organic matter; Online monitoring; Fluorescence;

   Sammanfattning : Drinking water is widely collected from surface water sources. In these water sources, both the quantity and quality of natural organic matter (NOM) have been affected around the world during the last decades, especially in Northern Europe and North America. LÄS MER

5. 14. Molecular filtration : the study of adsorbents

   Författare :Ebenezer Twumasi; Christer Sjöström; Paolo Tronville; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adsorbents; activated carbon; alumina; MgCa-silica; carbon-silica composite; characterization; porous parameters; molecular filtration; Other civil engineering and architecture; Övrig samhällsbyggnadsteknik och arkitektur;

   Sammanfattning : Adsorbent materials for gas purification have been studied and developed for application in many areas. It is known that a single adsorbent may not adequately control multiple contaminants. Therefore, the development of adsorbent materials has accelerated over the past two decades, and is today an area attracting a lot of attention. LÄS MER

7. 15. Preparation and Evaluation of New Nanoporous Silica Materials for Molecular Filtration and for Core Materials in Vacuum Insulation Panels

   Författare :Ebenezer Twumasi Afriyie; Folke Björk; Christer Sjöström; Kjartan Gudmundsson; Per Jostein Hovde; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adsorbents; activated carbon; MgCa-silica; carbon-silica composite; characterization; porous parameters; molecular filtration; thermal conductivity; thermal insulation;

   Sammanfattning : Nanoporous materials for gas purification and thermal insulation have been studied and developed for application in many areas. It is known that a single adsorbent may not adequately control multiple contaminants. Further the utilization of nanoporous material as thermal insulator in building applications is limited due to high cost. LÄS MER