Luleå University of Technology is growing rapidly with world-leading expertise in several research areas. We shape the future through innovative education and groundbreaking research results, and based on the Arctic region, we create global social benefits. Our scientific and artistic research and education are conducted in close collaboration with international, national and regional companies, public actors and leading universities. Luleå University of Technology has a total turnover of SEK 2 billion per year. We are currently 1,500 employees and have 17,900 students. In the coming years, billions of kronor will be invested in Norrbotten and Västerbotten in major projects aimed at a more sustainable society nationally as well as globally. Luleå University of Technology is involved in several of these highly topical research projects and the social transformation that follows. We have a wide range of programs to match the skills that are in demand. We hope you will help us build the sustainable businesses and societies of the future. The Biochemical Process Engineering research group is looking to recruit a postdoctoral researcher for a research project involving the development of lignin-based flotation reagents. The research group is responsible for a diverse laboratory with key competences in bio-based products and processes covering biomass pretreatment, fractionation, fermentation, conversion processes, green chemistry, upstream and downstream processes. The research subject is part of the Department of Civil, Environmental and Natural Resources Engineering with about 350 employees. It consists of 15 senior researchers and several PhD students. Subject description: Biochemical Process Engineering focuses on biochemical processes for the production and processing of chemicals, fuels and materials from biomass. Project description The project aims to characterize and identify the interaction mechanism between lignin and xanthates, as well as between lignin and minerals, in order to adapt and produce a lignin reagent that can enable a 100% bio-based flotation process. Different lignin samples will be isolated and characterized, followed by the production of representative nanoparticles.The environmental impact of the lignin reagent will be evaluated through biodegradability and ecotoxicity studies, as well as analysis of the process water. Work tasks The work concerns the evaluation of flotation performance of new flotation collectors consisting of lignin nano- and microparticles. Specifically, the work includes physiochemical characterization of the lignin particles and evaluation of their flotation performance for different types of sulfide ores. A central part of the work is to study and understand the interactions between lignin particles and selected minerals, and to clarify how the structural properties of lignin affect the outcome of the flotation process. You will also apply organosolv fractionation to isolate lignin with tailored structural properties. As a postdoc, you will be responsible for planning, organizing and conducting the experimental work to achieve the project goals. You will also be responsible for analyzing experimental data and presenting the results in scientific publications and conferences. As a postdoc, you are expected to participate in the supervision of PhD students. Finally, you will be expected to participate in and/or lead the writing of research proposals to national and EU research programs. Qualifications To be eligible for the position, you must have a PhD in a field relevant to the position. Proven experience in evaluating novel bio-based reagents in mineral flotation is a requirement. Previous documented experience in lignin isolation, characterization and preparation and characterization of lignin micro- and nano-particles is a very strong merit. Documented experience with relevant analytical methods such as XRF/XRD, SEM, FTIR and HPLC is also meritorious. We are looking for you who are committed, determined and have a strong interest in research. You are expected to lead the project and work both independently and in close collaboration with others in the research group and with our partners. Good observation and communication skills are important, and you should have a good command of English, both spoken and written. Information about the position Temporary full-time position for 3 years. Appointment as soon as possible, but no later than January 2025. For more information please contact: Dr. Leonidas Matsakas, Assistant Professor of Biochemical Process Engineering, 0920-49-3043, leonidas.matsakas@ltu.se Trade union representatives: SACO-S Diana Chroneer, 0920-49 2037 diana.chroneer@ltu.se OFR-S Lars Frisk, 0920-49 1792 lars.frisk@ltu.se How to apply You apply by using the link below. Applications should include a cover letter, CV and verified university degree. Please mark your application with the reference number below. The application and the degree certificate must be written in Swedish or English. Deadline for applications: December 3, 2024 Reference number: 4555-2024