Search for dissertations about: "trace metal elements"

Showing result 1 - 5 of 34 swedish dissertations containing the words trace metal elements.

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

    University dissertation from Örebro : Örebro universitetsbibliotek

    Author : Evastina Grahn; Örebro universitet.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; lake sediment; environmental pollution; trace elements; chronology; diagenesis; Ag; Be; Ga; In; Pb; Sb; Tl; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Enviromental Science; Miljövetenskap;

    Abstract : 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. READ MORE

  2. 2. Distribution and chemical association of trace elements in incinerator residues and mining waste from a leaching perspective

    University dissertation from Örebro : Örebro university

    Author : Naeem Saqib; Örebro universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; trace elements; partitioning; fly ash; bottom ash; speciation; association; risk assessment; wood waste; incineration; mining waste; Kemi; Chemistry;

    Abstract : Incineration is a mainstream strategy for solid waste management in Sweden and all over the world. Improved knowledge and understanding about the distribution of trace elements (in ashes) during incineration, and how trace element partitioning respond to the changes in waste composition, are important in terms of combustion process optimization and plant efficiency. READ MORE

  3. 3. Trace metal speciation in the Baltic sea

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Johan Gelting; Luleå tekniska universitet.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Abstract : Physicochemical speciation of metals in natural waters is very important for understanding their distribution, mobility, bioavailability and toxicity. To be able to understand the behaviour of an aqueous element and the transformation between chemical and physical species, there is a need for reliable methods that enable measurements of specific fractions of metals. READ MORE

  4. 4. Biogeochemical evidences of human intervention in a shallow lake, Zeekoevlei, South Africa

    University dissertation from Stockholm : Institutionen för geologi och geokemi

    Author : Supriyo Das; Stockholms universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; lake; primary productivity; biomarkers; stable isotopes; trace elements; phosphorus; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap; geokemi; Geochemistry;

    Abstract : This thesis describes a multi-parameter biogeochemical investigation in a shallow hyper-eutrophic freshwater coastal lake, Zeekoevlei, in South Africa. The predominance of autochthonous algal-derived organic matter in lake sediments is indicated by low C/N, high H/C ratios and δ13Corganic values. READ MORE

  5. 5. Colloidal carrier substances : Properties and impact on trace metal distribution in natural waters

    University dissertation from Linköping : Linköpings universitet

    Author : Anna Ledin; Linköpings universitet.; Linköpings universitet.; [1993]

    Abstract : Colloidal (<0,45 J.Im) and suspen~ed matter (>0,45 J.Im) are important constituents in the aquatic environment, due to their impact on the mobility and bioavailability of associated components (e.g. READ MORE