Sökning: "Phosphorus extractions"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Phosphorus extractions.
1. Soluble and Plant Available Phosphorus in Acid Soils
Sammanfattning : The P availability and solubility differ between soils and plants seem to have different ways of utilising the P present. The many P fractions present in soil interact and are closely related to another and transformations may easily occur. Due to this more P than the soluble fraction is available to plants. LÄS MER
2. Bed filters for phosphorus removal in on-site wastewater treatment : Removal mechanisms and sustainability
Sammanfattning : For many surface waters, phosphorus (P) leaching is a serious problem that should be minimized to prevent eutrophication. In Sweden there is a demand for physical and technical development of high-performance P removal techniques to reduce phosphorus leaching from on-site wastewater treatment systems to the Baltic Sea. LÄS MER
3. Phosphorus chemistry in managed forest soils : effects of weathering and wood ash fertilisation
Sammanfattning : Weathering and Podzolisation are key mechanisms that transform primary mineral apatite into a phosphorus (P) pool with low solubility. In addition, intensive forest harvesting removes nutrients from the soil, reducing P availability. LÄS MER
4. Pressurized Fluid Extraction : A Sustainable Technique with Added Values
Sammanfattning : The challenge for the future was defined by the Brundtland Commission (1987) and by the Rio Declaration (1992), in which the fundamental principles for achieving a sustainable development were provided. Sustainable chemistry can be defined as the contribution of chemistry to the implementation of the Rio Declaration. LÄS MER
5. Removal and Recovery of Metals from Municipal Solid Waste Incineration ashes by a Hydrometallurgical Process
Sammanfattning : Municipal Solid Waste Incineration (MSWI) fly ash contains significant amounts of leachable metals, and is therefore considered to be a hazardous waste. The increased amounts of fly ash generated cause environmental issues, management costs and accumulation of valuable metals in landfills. LÄS MER