Sökning: "contaminant"

Visar resultat 6 - 10 av 153 avhandlingar innehållade ordet contaminant.

  1. 6. Contaminant transport in non-uniform streams and streambeds

    Författare :Jonas K. Forsman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Sub-surface transient storage; reactive tracers; analytical solutions; Geovetenskap; Earth sciences; Geovetenskap; Sedimentology; sedimentologi;

    Sammanfattning : The interplay between hydraulic and chemical processes in streams and adjacent storage zones, e.g. streambed sediments, is of crucial importance for the large-scale transport of released contaminants. This thesis presents a methodology for tracer experiments and the development of mechanistic transport models. LÄS MER

  3. 7. Assessing environmental and contaminant stressors in a benthic amphipod

    Författare :Therese Jacobson; Brita Sundelin; Tamara Galloway; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Multiple stressors; Reproduction; Temperature; Food; Parasites; Fenarimol; PFOS; TBT; Endocrine disruption; Ecdysteroids; Microsporidia; Microcosm; Crustacea; Amhipoda; Monoporeia affinis; Biology; Biologi; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Organisms in the aquatic environment encounter numerous stressors throughout their lifespan. Some of them are biotic such as food availability, predators and parasites. Others are abiotic and include shifting salinity and temperature change among others. LÄS MER

  4. 8. Air diffusion and solid contaminant behaviour in room ventilation : a CFD based integrated approach

    Författare :Gery Einberg; Sture Holmberg; hazim Awbi; KTH; []
    Nyckelord :Technology; CFD modelling; airflow rate; ventilation efficiency; diffusers; solid contaminants; IAQ; TEKNIKVETENSKAP; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : One of the most fundamental human needs is fresh air. It has been estimated that people spend comparatively much time in indoor premises. That creates an elevated need for high-quality ventilation systems in buildings. The ventilation airflow rate is recognised as the main parameter for measuring the indoor air quality. LÄS MER

  5. 9. Sustainable Environmental Clean-up : Dynamic assessment for sustainable remediation of contaminated sites

    Författare :Mehran Naseri Rad; Avdelningen för Teknisk vattenresurslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; contaminated sites; sustainability assessment; remediation; multicriteria decision analysis; system dynamics; contaminant transport;

    Sammanfattning : Soil and groundwater contamination is an increasingly recognised threat to public health and the environment around the globe. New types of contaminants continue to emerge, and awareness of their threat, continues to develop. Many countries have national clean-up programs with priority lists of the most hazardous contaminated sites. LÄS MER

  7. 10. Effects of contaminant mixtures on marine zooplankton diversity and function

    Författare :Christina Jönander; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zooplankton; copepods; ciliates; dinoflagellates; mixture toxicity; chemical mixtures; marine contaminants; biodiversity; reproduction; ULSFO; closed-loop scrubbers; exhaust gas cleaning systems;

    Sammanfattning : Chemicals have important roles in our society and can be used as ingredients in personal care products, pesticides, pharmaceuticals, as well as be components of fuels used in cars or ships. More than 350 000 chemicals and mixtures have been registered for use, which only covers a part of all the chemicals that we may come into contact with. LÄS MER