Sökning: "water chemistry"

Visar resultat 21 - 25 av 282 uppsatser innehållade orden water chemistry.

1. 21. Biocatalysis in Pickering emulsions

   Master-uppsats, Lunds universitet/Bioteknik (master); Lunds universitet/Bioteknik (CI)

   Författare :Christine Vera Isabel Schmidt; [2023]
   Nyckelord :Enzymes; Pickering emulsion; Amine Transaminases; Green Chemistry; Stereoselectivity; Biotechnology; Biology and Life Sciences;

   Sammanfattning : Employing enzymes as catalysts in the production of chiral amines that are both used as building blocks and active pharmaceutical ingredients might be promising due to milder reaction conditions compared to non-biological catalysts, exclusion of heavy metals, high selectivity towards substrates and precision in chirality of the products. Transaminases are attractive for the use in this process. LÄS MER

3. 22. Modified cellulose synthesized by different deep eutectic solvents as an additive in paper making process

   Master-uppsats, Karlstads universitet

   Författare :Shiniar Said Saleh; [2023]
   Nyckelord :green chemistry; dry strength additives; deep eutectic solvents; sodium periodate oxidation; charge density; dewatering; mechanical strength.;

   Sammanfattning : The environmental concerns that come with the currently used traditional papermaking process where petroleum-based additives are used, has tempted researchers to study “green” additives by introducing environmentally friendly modifications of cellulose as an additive in the papermaking process. This thesis will spin further on that by producing additives with different charge densities and focus on to incorporate an etherification reaction into potentially greens systems based on non-toxic and readily biodegradable deep eutectic solvent (DES). LÄS MER

4. 23. Upptagshastigheter av metaller med salix

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Anton Lilja; [2023]
   Nyckelord :phytoremediation; phytoextraction; salix; metals; landfill leachate; leachate management; fytosanering; fytoextraktion; salix; metaller; deponilakvatten; lakvattenhantering;

   Sammanfattning : Phytoremediation is a technology that can be used in several ways to remediate polluted soils and water. Today, phytoremediation is viewed by many as a technology in the development phase and therefore it is important to evaluate existing facilities to create more support for future establishment. LÄS MER

5. 24. Biogas Potential in the North of Sweden : Inventory and Techno-Economic Assessment of Substrates for an Increased Biogas Production in Norrbotten

   Master-uppsats, Lunds universitet/Kemiteknik (CI)

   Författare :Alma Fahlén Hammar; [2023]
   Nyckelord :Biogas; anaerobic digestion; AD; Norrland; bioenergy; fossil-free; chemical engineering; Chemistry; Technology and Engineering;

   Sammanfattning : Great investments are planned in the north of Sweden the coming years, not the least in the county of Norrbotten where the projects collectively are referred to as the green transition due to the focus on fossil-free techniques. But to be able to secure a sustainable energy supply and reach the goal set by the member states of the European Union of a carbon dioxide neutral union in 2050 the production of alternative energy sources needs to intensify. LÄS MER

7. 25. Newly inundated forest landscapes - hotspots for mercury in water and benthic fauna

   Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

   Författare :Kirstine Evald Andersson; [2023]
   Nyckelord :Wetland restoration; Inundation; Mercury cycling; Beaver impoundments; Aquatic biogeochemis-try;

   Sammanfattning : Mercury (Hg) is a widespread contaminant in high-latitude aquatic ecosystems, where it can undergo microbial transfor-mation into toxic methylmercury (MeHg). Due to its chemical properties, MeHg tends to accumulate in the aquatic food chain and will eventually end up in predatory species at the top of the terrestrial food web. LÄS MER