Essays about: "trace elements"

Showing result 11 - 15 of 112 essays containing the words trace elements.

  1. 11. The Fe-oxides (mineralogical, chemical, and textural) variation in the Leveäniemi deposit using micro-analytical tools for unraveling of primary features and metamorphic recrystallisation

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Adrian Larsson; [2022]
    Keywords : Leveäniemi; Magnetite; Hematite; Iron oxides; Iron oxide apatite;

    Abstract : The Leveäniemi iron oxide apatite (IOA) deposit, mined by LKAB, is located in Norrbotten, northern Sweden. The deposit has a partially more complex mineralogy than the neighbouring and more famous IOA deposits of Kiirunavaara and Malmberget. READ MORE

  3. 12. Elemental variability in tree-rings as indicator for climate change : a case study on beech and oak trees at the Laacher See, Germany

    University essay from Stockholms universitet/Institutionen för naturgeografi

    Author : Ann-Kathrin Wild; [2022]
    Keywords : trace elements; tree-rings; dendrochemistry; dendroclimatology; ITRAX; Laacher See; mofettes; tree-bark; Quercus sp.; Fagus sp.;

    Abstract : The aim of this study was to contribute to the comprehension of the connection of element uptake in trees at the Laacher See in Germany and climatic parameters on different time scales. Understanding the relationship of certain elements in trees and temperature might enable the assignment of extraordinary high peaks in the elemental concentration, which cannot be explained by temperature, to another process as CO2 degassing of the mofettes, which are relics of the volcanic past of the lake. READ MORE

  4. 13. Critical elements scavenged by secondary gypsum and HFO : Determined by sequential extraction combined with mineralogical studies

    University essay from Luleå tekniska universitet/Geovetenskap och miljöteknik

    Author : Emma Flodin; [2022]
    Keywords : Geochemistry; gypsum; HFO; adsorption; scavenged; critical elements; beryllium; Yxsjöberg; mine waste; Sequential extraction; XRD; SEM-EDS;

    Abstract : The demand for metals is great for the purpose of developing green technologies, and EU has listed 30 metals and minerals that are of critical importance for the maintenance and evolving of today’s society, so called critical materials. However, mining of raw materials generates mine waste which can have adverse effect on human health, ecosystems, and surrounding areas. READ MORE

  5. 14. Determination of bio-accessible amounts of metal trace elements in baby food using In vitro artificial digestion

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Marcus Andersson; [2022]
    Keywords : Food; toxic metals; children; bio-accumulation; artificial digestion; ICP-MS;

    Abstract : Prefabricated baby food is under strict EU legislation by Commission Regulation (EC) 1881/2006 Setting maximum levels for certain contaminants in foodstuffs regarding the maximum allowed content of potentially harmful elements. For potentially toxic trace elements the regulated maximum content is regulated for lead, cadmium, mercury, inorganic tin, inorganic arsenic, cesium, copper and manganese. READ MORE

  6. 15. Geochemical Study of Trace and Critical Elements in Chalcopyrite and Pyrite from the Assarel Porphyry-Cu-Au Deposit, Bulgaria

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Liz Lobo; [2022]
    Keywords : Citical metals; Trace elements; Cu-Au porphyry deposit; Orexplore GeoCore X10; LA-ICP-MS.;

    Abstract : .... READ MORE