Search for dissertations about: "Heavy metals"

Showing result 6 - 10 of 212 swedish dissertations containing the words Heavy metals.

  2. 6. From hydrothermal carbonization to blue hydrochars and activated carbons : Adsorption of volatile organic compounds and heavy metals

    Author : Vahid Saadattalab; Niklas Hedin; Satu Ojala; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Hydrothermal carbonization; hydrochars; activated carbon; volatile organic compounds; heavy metals; materialkemi; Materials Chemistry;

    Abstract : Hydrothermal carbonization of carbohydrate and biomass is a straightforward method for preparing hydrochars at low temperature. Hydrochars are more carbonized than their precursors. Hydrochars themselves are carbon precursors for preparing activated carbons. Activated carbons are porous materials that can be used for water and air purification. READ MORE

  4. 7. Heavy metal contamination and toxicity : Studies of Macroalgae from the Tanzanian Coast

    Author : Florence Alex Mamboya; Mats Björk; Nils Ekelund; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Heavy metals; Padina gymnospora; Ulva reticulata; salinity; nutrients; proteins; uptake; growth; Fv Fm; Zanzibar Channel; Plant physiology; Växtfysiologi; växtfysiologi; Plant Physiology;

    Abstract : Concentrations of various metals are elevated above background levels in several intertidal areas along the Tanzanian coasts. However, there is little available information concerning the toxicity of these metals and how the uptake of these metals by bioindicators are influenced by external factors, such as heavy rains and increased coastal eutrophication, which tend to fluctuate. READ MORE

  5. 8. Transcriptional biomarkers of toxicity – powerful tools or random noise? : An applied perspective from studies on bivalves

    Author : Gustaf Magnus Oskar Ekelund Ugge; Olof Berglund; Annie Jonsson; Helena Westerdahl; Mikael Ejdebäck; Bruno Nunes; Högskolan i Skövde; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Biomarkers; Bivalves; Bivalvia; Ecotoxicology; Environmental toxicology; Environmental risk assessment; RT-qPCR; qPCR; Quantitative PCR; Systematic review; Meta-analysis; Dose-response relationships; Concentration-response relationships; Heavy metals; Metals; General toxicity; Copper; Duck mussel; Anodonta anatina; Freshwater; Gene transcription; Biomarkörer; Musslor; Bivalvia; Ekotoxikologi; Miljötoxikologi; Miljöriskbedömning; RT-qPCR; qPCR; Kvantitativ PCR; Systematic review; Metaanalys; Dos-responssamband; Koncentration-responssamband; Tungmetaller; Metaller; Allmän toxicitet; Koppar; Allmän dammussla; Anodonta anatina; Sötvatten; Gentranskription; Ekologisk modellering; Ecological Modelling Group; Biomarkörer; Musslor; Bivalvia; Ekotoxikologi; Miljötoxikologi; Miljöriskbedömning; RT-qPCR; qPCR; Kvantitativ PCR; Systematic review; Metaanalys; Dos-responssamband; Koncentration-responssamband; Tungmetaller; Metaller; Allmän toxicitet; Koppar; Allmän dammussla; Anodonta anatina; Sötvaten; Gentranskription; Biomarkers; Bivalves; Ecotoxicology; Environmental toxicology; Environmental risk assessment; Quantitative PCR; Meta-analysis; Dose-response relationships; Concentration-response relationships; Heavy metals; Metals; General toxicity; Copper; Duck mussel; Freshwater; Gene transcription;

    Abstract : Aquatic organisms are constantly at risk of being exposed to potentially harmful chemical compounds of natural or anthropogenic origin. Biological life can for instance respond to chemical stressors by changes in gene expression, and thus, certain gene transcripts can potentially function as biomarkers, i.e. READ MORE

  6. 9. Interactions between calcium and heavy metals in Norway spruce : Accumulation and binding of metals in wood and bark

    Author : Ann Helén Österås; Maria Greger; Lena Kautsky; Douglas L. Godbold; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant physiology; Växtfysiologi;

    Abstract : Waste products from the forest industry are to be spread in forests in Sweden to counteract nutrient depletion due to whole tree harvesting. This may increase the bioavailability of calcium (Ca) and heavy metals, such as cadmium (Cd), copper (Cu) and zinc (Zn) in forest soils. READ MORE

  7. 10. Transport of Arsenic and Heavy Metals to Lake Poopó - Bolivia Natural Leakage and Anthropogenic Effects

    Author : Maria Garcia Moreno; Avdelningen för Teknisk vattenresurslära; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogeology; Naturvetenskap; Natural science; Miljöstudier; Environmental studies; Poopó Lake; heavy metals; Bolivia; geographical and geological engineering; Hydrogeologi; teknisk geologi; teknisk geografi;

    Abstract : Bolivia, a country located in the center of South America, has in the west part an Andean region, where the Poopó Lake is located. The area has many mineral resources, and thus since thousands of years,mining activity has had a large importance; however, mainly since colonial times, the extraction of these resources has been indiscriminate and the region of the Poopó Lake, has suffered the consequences of environmental contamination. READ MORE