**Daniel Vollprecht**

Dr. Daniel Vollprecht studied Mineralogy at TU Bergakademie Freiberg, Germany, and graduated in 2008. He started his career at Graz University of Technology, Austria, and received his doctoral degree in Earth Sciences in 2013. Since then, he has been the leader of the Working Group "Mineral Wastes, Landfills, and Contaminated Sites", which recently changed its name to "Material-oriented Waste Technology". His research focuses on the interaction between waste and the environment, especially with the leaching of heavy metals. He has conducted several national and international research projects, e.g., on landfill mining (national project LAMIS (2013–2015) and the EU project NEW-MINE (2016)), the mineralogy and leachability of steel slags (projects MiLeSlag (2016–2019) and MiLeSlag 2.0 (2019–2022)), in situ remediation (projects ChromSan (2013–2015), LISA (2015–2019) and InnoBLA (2020–2022)) and metal recovery from waste waters (projects RECOMET (2014–2015) and RECOMET 2.0 (2015–2018)). He is a member of the ISWA and OWAV ¨ working groups on landfills and a board member of the German and Austrian Mineralogical Societies. In 2020 he received the "venia docendi" in Waste Technology for his Habilitation Thesis entitled "Exploration, Mobilization and Fixation of Constituents of Mineral Wastes, Landfills, Contaminated Sites and Waste Waters". Finally, he has authored more than 40 peer-reviewed publications at the intersection between waste management and geosciences and has been a scientific reviewer for various international journals from both fields.

## **Renato Sarc**

Dr. Renato Sarc studied Industrial Environmental Protection, Waste Management and Recycling at Montanuniversitat¨ Leoben, Austria, and graduated in 2010. He started his career at the same university, Montanuniversitat¨ Leoben, and received his doctoral degree in Waste Management in 2015. Since then, he has been the leader of the Working Group "Waste Fuel", which recently changed its name to "Process-oriented Waste Technology". Since 2015 he has been the Deputy of the Chair of Waste Processing Technology and Waste Management and since 2017 he has worked as a Post Doc Senior Scientist and Project Leader of the COMET—Competence Centers for Excellent Technologies "ReWaste4.0" (2017–2021) and "ReWaste F" (2021–2025) at Montanuniversitat¨ Leoben. Since 2020 he has been a member of the national Committee 157 of the Austrian Standards Institute and the Austrian Delegate in ISO/TC 300 (Working Group 5), and since 2022 he has been the Chairman of the Advisory Board of the V.EFB—the association responsible for awarding certificates t o waste management companies in Austria. He has gained additional qualifications in w aste management such as "waste manager" and "waste management officer". He has conducted several national and international research projects in cooperation with different national and international companies and institutions. Finally, he has authored a wide range of peer-reviewed publications in the scientific area of waste management, treatment and technology; has been a scientific r eviewer f or various international journals; and has received several prestigious awards for his work.
