Sökning: "trace elements"

Visar resultat 1 - 5 av 157 avhandlingar innehållade orden trace elements.

1. 1. Phytoremediation of soil contaminated with petroleum hydrocarbons and trace elements

   Författare :Charlotte Marchand; Hogland William; Hijri Mohamed; Bramryd Torleif; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Petroleum Hydrocarbon; Trace Elements; Gentle Soil Remediation Options; Polycyclic Aromatic Hydrocarbon; Respirometry; Ecopile; Bacteria; Fungi; Miljövetenskap; Environmental Science;

   Sammanfattning : The rapid urbanization and industrialization has led to an increase of disposal petroleum hydrocarbons (PHC) and trace elements (TE) into the environment. These pollutants are considered as the most toxic contaminants in the world due to their persistence in the environment, and the long range of toxicological effects for living beings. LÄS MER

3. 2. Lake sediment as environmental archive : natural and anthropogenic influence on the chronology of trace elements

   Författare :Evastina Grahn; Stefan Karlsson; Anders Düker; Bo Bergbäck; Örebro universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lake sediment; environmental pollution; trace elements; chronology; diagenesis; Ag; Be; Ga; In; Pb; Sb; Tl; Environmental chemistry; Miljökemi; Enviromental Science; Miljövetenskap;

   Sammanfattning : The focus of this thesis is the historical pollution of some seldom-monitored trace elements (SMTEs; Ag, Be, Ga, In, Sb and Tl) that have been involuntarily released for several thousands of years but whose usage have increased during the industrial era. Sediment cores from four rural lakes in a south to north transect in central Sweden, and two urban lakes have been used as environmental archives for chronological studies. LÄS MER

4. 3. Fate of Trace Elements in Thermochemical Conversion of Waste Fuels Using Oxygen Carriers

   Författare :Ivana Stanicic; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Oxygen Carrier Aided Combustion; X-ray Photoelectron Spectroscopy; Ash interaction; Chemical Looping Technologies; Thermodynamic Calculations; Waste; Oxygen Carriers; Ilmenite; Trace Elements;

   Sammanfattning : The metals zinc, copper and lead are amongst the more abundant trace elements in waste fuels. The fate of these elements is important to study because they can affect the thermochemical conversion process and end up in ashes. LÄS MER

5. 4. Trace elements in fine particles and aqueous biota - A field study in Vietnam

   Författare :Annemarie Wagner; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Energy dispersive X-ray fluorescence EDXRF ; total reflection X-ray fluorescence TXRF ; graphite-furnace atomic absorption spectroscopy GF-AAS ; trace elements; Vietnam; fine particles PM2.5 ; biolocical indicators; freshwater fish C. fucus ; freshwater mussel C. bialate and P. swinhoei ; Vietnam;

   Sammanfattning : .... LÄS MER

7. 5. Landfills and glass dumpsites as future bank accounts of resources : waste characterization and trace elements extraction

   Författare :Yahya Jani; William Hogland; Monica Odlare; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Landfill mining; metals extraction; glass dumpsites; hazardous waste; chemical extraction; reduction-melting; Miljövetenskap; Environmental Science;

   Sammanfattning : Environmental pollution and health threats as well as scarcity of raw materials, water, food and energy are among the main challenges our world are now facing. Simultaneously, landfills and open dumpsites still are the dominant global waste disposal option even with their long term environmental impacts in case of greenhouse gases and contaminated leachates. LÄS MER