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Showing result 1 - 5 of 115 swedish dissertations matching the above criteria.

2. 1. Analysis and speciation of organic phosphorus in environmental matrices : Development of methods to improve 31P NMR analysis

   Author : Johan Vestergren; Gröbner Gerhard; Jurgen Schleucher; Ulrik Ilstedt; Per Persson; Reiner Giesler; Benjamin L. Turner; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Phosphorus; soil; 31P NMR; NaOH EDTA; terrestrial; sulfide; speciation; bioavailability; paramagnetic; humus; boreal; tropical; multi-dimensional; agroforestry; chronosequence; fysikalisk kemi; Physical Chemistry;

   Abstract : Phosphorus (P) is an essential element for life on our planet. It is central in numerous biochemical processes in terrestrial and aqueous ecosystems including food production; and it is the primary growth-limiting nutrient in some of the world’s biomes. READ MORE

4. 2. Microalgae for Phosphorus Removal from Wastewater in a Nordic Climate

   Author : Karin Larsdotter; Gunnel Dalhammar; Jörgen Hanaeus; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; assimilation; hydroponics; light; microalgae; nitrogen; phosphorus; plants; precipitation; wastewater treatment; Bioengineering; Bioteknik;

   Abstract : As part of a research project aiming to develop and evaluate a hydroponic system for wastewater treatment in Sweden, extended nutrient removal by microalgae was tested. The hydroponic/microalgal wastewater treatment system was built in a greenhouse in order to improve growth conditions for plants and algae. READ MORE

5. 3. Data-driven analysis of water and nutrient flows: Case of the Sava River Catchment and comparison with other regions

   Author : Lea Levi; Vladimir Cvetkovic; Georgia Destouni; Roko Andričević; Ronny Berndtsson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; River catchment; Transboundary; Hydro-climatic change; Total nitrogen; Total phosphorus; CMIP5; Land and Water Resources Engineering; Mark- och vattenteknik;

   Abstract : A growing human population and demands for food, freshwater and energy are causing extensive changes in the water and biogeochemical cycles of river catchments around the world. Addressing and investigating such changes is particularly important for transboundary river catchments, where they impose additional risk to a region’s stability. READ MORE

6. 4. Free-Vehicle Benthic Lander Technology for the Study of Biogeochemical Processes in Marine Sediments

   Author : Anders Tengberg; Göteborgs universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; marine sediments; benthic fluxes; incubations; chambers; in-situ; benthic landers; autonomous vehicles; lander technology; hydrodynamics; calibration; experimental design; Partial Least Squares PLS ; sensors; fugacity; oxygen; carbon; nitrogen; phosphorus; silica; dissolved organic carbon DOC ; total carbonate; recycling; burial; lander technology;

   Abstract : Various sediment sampling and incubation techniques were used to characterize benthic biogeochemical processes important for an improved understanding of the oceanic carbon cycle. Recent flux data from the Arctic Siberian shelf are revealing differences (often by a factor of ten) between areas affected by the big Russian river outlets (high fluxes) and areas with low influence from land (low fluxes). READ MORE

7. 5. Organic phosphorus speciation in environmental samples : Method development and applications

   Author : Julia V. Paraskova; Per J.R. Sjöberg; Emil Rydin; William T. Cooper; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic phosphorus; DNA; phospholipids; inositol phosphates; sediment; soil; extraction; liquid chromatography LC ; mass spectrometry MS ; Kemi med inriktning mot analytisk kemi; Chemistry with specialization in Analytical Chemistry;

   Abstract : This thesis investigates the development of new methodology for the identification and quantification of organic phosphorus compounds in environmental samples.Phosphorus is a vital element for primary production and one of the factors contributing to eutrophication. READ MORE