Search for dissertations about: "microbial geochemistry"
Showing result 1 - 5 of 23 swedish dissertations containing the words microbial geochemistry.
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1. Microbially mediated formation of birnessite-type manganese oxides and subsequent incorporation of rare earth elements, Ytterby mine, Sweden
Abstract : Microbes exert extensive control on redox element cycles. They participate directly orindirectly in the concentration and fractionation of elements by influencing the partitioningbetween soluble and insoluble species. READ MORE
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2. A song of ice and mud : Interactions of microbes with roots, fauna and carbon in warming permafrost-affected soils
Abstract : Permafrost-affected soils store a large quantity of soil organic matter (SOM) – ca. half of worldwide soil carbon – and currently undergo rapid and severe warming due to climate change. READ MORE
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3. Microbial biofilm communities associated with degradation of sprayed concrete in subsea tunnels
Abstract : Deterioration of concrete leads to reduced structural strength implying high societal challenge with huge economic impact. In the Oslofjord subsea tunnel, complex microbial biofilm activity together with abiotic attack from saline groundwater are responsible for concrete matrix degradation and steel fiber corrosion. READ MORE
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4. Microbially induced concrete degradation in subsea tunnels - Community structure of biofilms from sprayed reinforced concrete in the Oslofjord tunnel
Abstract : Microbially induced concrete deterioration has been discovered in several Norwegian subsea tunnels with significant disintegration of the calcium silicate hydrate (C-S-H) and steel fibre corrosion in areas with leakages of saline groundwater. Complex microbial biofilm activity together with abiotic attack from saline ground water, with high concentrations of Cl−, SO42−, Mg2+ and HCO3−, are responsible for the degradation in the specific subsea tunnel environment. READ MORE
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5. Microbial communities and nitrogen cycling functions in barrier systems for treatment of nitrogen polluted water
Abstract : Water is an increasingly threatened resource. Anthropogenic input of nitrogen (N) to surface waters causes eutrophication, and N in the groundwater can be a threat to human health, hence management measures are needed. READ MORE
