Sökning: "Acidic leaching"
Visar resultat 1 - 5 av 28 avhandlingar innehållade orden Acidic leaching.
1. Removal of Metal Ions from Wood Chips during Acidic Leaching
Sammanfattning : Wood chips are the main source of intake of non-process elements at kraft pulp mills. It would be advantageous to decrease the content of these elements in the chips prior to pulping. LÄS MER
2. Inorganic ions in wood chips- Leaching prior to Kraft pulping and effect of calcium on Kraft delignification
Sammanfattning : Wood is the main source of Non-Process Elements (NPEs), such as, calcium, potassium, manganese and chloride in Kraft pulp mills. Due to the recirculation of cooking chemicals and water, process disturbances related to the accumulation of NPEs in the process streams are inevitable. LÄS MER
3. Hydrometallurgical Treatment of Neodymium Magnet Waste
Sammanfattning : Recent decades have seen a considerable increase in the usage of rare-earth elements (REEs) in modern technologies and green energy sources. Recycling of REEs out of end-of-life products and E-scrap has become an alternative to mining them out of primary ores due to their supply risk in some countries and the development towards circular economies. LÄS MER
4. Recovery of copper and zinc in ashes from municipal solid waste combustion
Sammanfattning : The amount of municipal solid waste incineration (MSWI) fly ash has increased in many parts of the world in recent years. Ashes from municipal solid waste incineration (MSWI) may be a cumbersome waste to handle since containing significant amounts of leachable hazardous metal species and must be landfilled in special sites at high costs. LÄS MER
5. Hydrometallurgical recovery of rare earth elements from flourescent lamp waste fractions
Sammanfattning : Recovery and reuse of materials is important for a circular economy. In recent years the recovery of critical metals from end-of-life products has received increased attention. Various streams, e.g. LÄS MER