Sökning: "Ammonium nitrate"
Visar resultat 21 - 25 av 59 avhandlingar innehållade orden Ammonium nitrate.
21. Microbial communities and nitrogen cycling functions in barrier systems for treatment of nitrogen polluted water
Sammanfattning : 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. LÄS MER
22. The occurrence of amino acids in agricultural soil and their uptake by plants
Sammanfattning : The ability of plants to take up amino acids is widespread among plants, but the ecological and physiological implications of this ability are not fully understood. Therefore, in the investigations this thesis is based upon, key aspects of the uptake of amino acids by agricultural plants were explored in field studies (to ensure ecological relevance) and laboratory analyses (to ensure precision). LÄS MER
23. Imprint of management on microbial communities in arable soil : implications for N2O emissions
Sammanfattning : Arable soils are a major source of the greenhouse gas nitrous oxide (N2O), emissions of which are directly linked to increased use of N fertilizers. Microbial communities that drive N cycle processes in soil ultimately determine the fate of reactive N inputs and control N2O emissions. LÄS MER
24. Modelling and control of activated sludge processes with nitrogen removal
Sammanfattning : Stricter legislations on nitrogen removal together with increasing wastewater loads have successively increased the need for optimization and control of activated sludge processes. The aim of this thesis is primarily to propose and illustrate methods for modelling and control of activated sludge processes, and thus possibly improve process efficiency. LÄS MER
25. Speciation of copper in ashes from municipal solid waste combustion
Sammanfattning : Copper is one of the most important trace elements in municipal solid waste (MSW) combustion. Knowledge of the speciation of copper is fundamental for the understanding of the effects of copper compounds on the combustion chemistry as well as of the environmental impact of the ash. LÄS MER