Sökning: "pumice"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet pumice.

1. 1. Removal of Natural Organic Matter and Control of Trihalomethanes Formation in Water Treatment

   Författare :Herbert Mpagi Kalibbala; Elzbieta Plaza; Olle Wahlberg; Rose Kaggwa; Stein Wold Osterhus; KTH; []
   Nyckelord :Water treatment; pumice; roughing filtration; trihalomethanes; coagulant aid; volcanic ash; Vattenrening; pimpsten; grovfiltrering; trihalometaner; koaguleringsmedel; vulkanaska;

   Sammanfattning : Volcanic ash, pumice and Moringa oleifera (M. oleifera) were investigated as indigenous materials for removal of natural organic matter (NOM) at Kampala and Masaka water treatment plants in Uganda. LÄS MER

3. 2. Understanding Crustal Volatiles : Provenance,  Processes and Implications

   Författare :Lara S. Blythe; Valentin Troll; Ralf Gertisser; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; crustal volatiles; helium; carbon; volcanic gases and fluids; xeno-pumice; magma-carbonate interaction; upper crustal contamination;

   Sammanfattning : Knowledge of the provenance of crustal volatiles and the processes by which they are released is extremely important for the dynamics of magmatic systems. Presented here are the results of multiple investigations, which aim to understand magmatic volatile contamination from contrasting but complementary perspectives. LÄS MER

4. 3. Moringa seed and pumice as alternative natural materials for drinking water treatment

   Författare :Kebreab Afwerki Ghebremichael; Bengt Hultman; Hallvard Ödegaard; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Environmental technology; antimicrobial effects; coagulant protein; dual media filtration; ion exchange; Moringa oleifera; Miljöteknik; Environmental engineering; Miljöteknik;

   Sammanfattning : Pumice and the Moringa oleifera (MO) seed were investigated as alternative natural materials for drinking water treatment based on problems identified at the Stretta Vaudetto water treatment plant in Eritrea. Lab and pilot scale studies showed that pumice was a suitable alternative material for dual media filtration. LÄS MER

5. 4. The genetic relationship between rhyolitic volcanism and Zn-Cu-Au deposits in the Maurliden volcanic centre, Skellefte district, Sweden : volcanic facies, lithogeochemistry and geochronology

   Författare :Cecilia Montelius; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

   Sammanfattning : The Skellefte district is one of three major ore provinces in Sweden and contains more than 80 Zn-Cu-Au-Ag massive sulphide deposits. The Maurliden area in the central part of the district represents a subaqueous, constructional and relatively topographic high silicic volcanic centre. LÄS MER

7. 5. Performance of on-site systems and a green wall for greywater treatment

   Författare :Mashreki Sami; Annelie Hedström; Elisabeth Kvarnström; Inga Herrmann; Sahar Dalameh; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering;

   Sammanfattning : Greywater contains inorganic and organic substances, nutrients, pathogens, micropollutants and microplastics. Source-separated greywater using decentralized systems can potentially provide energy-efficient and low-maintenance treatment. LÄS MER