The Disputation will be live streamed for everyone else.
The livestream will be activated 15 minutes before the Defense starts.
Trial lecture
June 7th, 10:15 AM, Auditorium 3, Chemistry building
Trial lecture title:
"XRF for raw material characterization - challenges and possibilities"
The trial lecture will be live streamed for everyone else.
The livestream will be activated 15 minutes before the trial lecture starts.
Kreeringssammendrag/Conferral summary
Doktorgradsstipendiaten utforsker innovative måter å omgjøre forbrenningsaske, et problematisk avfallsprodukt, til en verdifull ressurs. Han har utviklet en metode basert på ammoniakk-hydrometallurgi for selektivt å ekstrahere sink og kobber for resirkulering, de mest verdifulle metallene som finnes i asken. Han har kvantifisert den kjemiske variabiliteten i asken med hensyn til opprinnelse og tid, og foreslår omfattende avfallsutnyttelsesprosesser som eliminerer behovet for farlige avfallsdeponier for forbrenningsaske.
Main research findings
Better waste management for waste incineration ash is a pressing need. Disposal sites for hazardous waste are being filled up by incineration ash, and opening new sites is difficult. Meanwhile, valuable resources in the ash are lost to landfills.
This research explores innovative ways to turn incineration ash into a valuable resource. First, the researchers have developed methods using ammonia hydrometallurgy to selectively extract up to 70% of the copper and 50% of the zinc from the ash - the most valuable metals in the waste.
Second, the metal extraction process is proposed as part of a comprehensive waste utilization scheme, including salt recovery and using the final waste as cement clinker raw material.
The chemical variability of waste incineration ash is quantified, both over time and by origin, using a large database from industry. This addresses the challenges of variability when working with secondary resources. The metal resource potential is estimated, and fly ash characteristics are presented.
The research paves the way for potential new fly ash waste management processes where waste is not just disposed of, but actively transformed into useful products, benefiting both the environment and the economy.
Candidate contact information
LinkedIn: www.linkedin.com/in/eirik-nøst-nedkvitne-66268290
E-post: e.n.nedkvitne@kjemi.uio.no / eirik.nedkvitne@ife.no
Tel.: +47 977 36 092
Adjudication committee
Professor Lisbeth M. Ottosen
Danmarks Tekniske Universitet (DTU), Denmark
Professor Kerstin Forsberg
KTH, Sweden
Professor Harald J. Walderhaug
Department of Chemistry, University of Oslo, Norway
Supervisors
Professor Jon Petter Court Omtvedt
Department of Chemistry, University of Oslo, Norway
Senior scientist Dag Øistein Eriksen, PhD
Department of Chemistry, University of Oslo, Norway
Chair of defence
Professor Steven Ray Haakon Wilson
Department of Chemistry, University of Oslo, Norway