Sökning: "Visual Minteq"

Visar resultat 11 - 15 av 18 uppsatser innehållade orden Visual Minteq.

  1. 11. Effects of pH and Cation Composition on Sorption of Per- and Polyfluoroalkyl Substances (PFASs) to Soil Particles

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Malin Ullberg; [2015]
    Nyckelord :Per- and polyfluoroalkyl substances PFASs ; Soil; Partitioning coefficients; Partitioning; sorption; solution chemistry; electrostatic interaction; Visual MINTEQ; Perfluoroalkylsubstanser PFAS ; jord; partitioneringskoefficienter; sorption; lösningske- mi; elektrostatisk interaction; Visual MINTEQ;

    Sammanfattning : Per- and polyfluoroalkyl substances (PFASs) have drawn great attention recently, due to their environmental persistence, potential toxicity and global distribution. PFAS is a large family of substances, characterized by a perflourinated carbon chain and a functional group. LÄS MER

  3. 12. Remediation of metal contaminated soils : evaluation of long-term effects of zero-valent iron amendments

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Aleksandra Monika Marsz; [2014]
    Nyckelord :zero-valent iron; stabilization; trace elements; soil contamination; remediation;

    Sammanfattning : The efficiency of contaminant stabilization in soil treated with zero-valent iron (ZVI) should be evaluated in long-term experiments, as stabilization techniques do not decrease total metal concentration. With time, properties of soil can change and iron hydroxides can crystalize, what can lead to a release of contaminants. LÄS MER

  4. 13. Löslighet och transport av sällsynta jordartsmetaller i Källfallsfältets gruvsandsmagasin

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Hugo de Campos Pereira; [2014]
    Nyckelord :rare earth elements; REE; mine waste; tailings; soil water; ground water; leaching tests; Visual MINTEQ; geochemical modeling; environmental risk assessment; ecotoxicity; sällsynta jordartsmetaller; REE; gruvavfall; anrikningssand; markvatten; grundvatten; laktest; Visual MINTEQ; geokemisk modellering; miljöriskbedömning; ekotoxicitet;

    Sammanfattning : Löslighet och transport av sällsynta jordartsmetaller i Källfallsfältets gruvsandsmagasin Hugo de Campos Pereira Syftet med detta arbete har varit att kartlägga vilka mekanismer som styr lösligheten av sällsynta jordartsmetaller (eng. rare earth elements, REE) i sulfidhaltig anrikningssand vid den föredetta gruvan Källfallsfältet i Västmanland. LÄS MER

  5. 14. Effects of uranium mining on groundwater - Geochemical modeling of aqueous uranium speciation due to changing redox conditions.

    Master-uppsats, KTH/Mark- och vattenteknik

    Författare :Adrian Gronowski; [2013]
    Nyckelord :Uranium mining; Uranium speciation; Uraninite; Uranium groundwater transport; Visual Minteq;

    Sammanfattning : As a consequence of rising uranium prices an interest in Sweden’s U deposits has emerged. This raises the important question of the possible environmental impacts of U mining operations. One of the most significant and serious issues is the contamination of groundwater by U following mining activities. LÄS MER

  7. 15. Avskiljning av uran från dricksvatten med reaktiva filter

    L3-uppsats, SLU/Dept. of Soil Sciences

    Författare :Ellinor Dässman; [2008]
    Nyckelord :uran; reaktiva filter; järnoxid; bergsborrade brunnar; jämviktsmodellering; Visual Minteq;

    Sammanfattning : Water is our most important provision and its quality is above all dependent on the geological conditions in the area from where it is extracted. Due to geological properties there are certain areas with an elevated risk of high uranium levels in the ground water, which in turn constitutes a risk for human health. LÄS MER