József Kónya is the professor of radiochemistry in the Isotope Laboratory of Colloid and Environmental Chemistry, University of Debrecen, Hungary. He received his M.Sc. and Ph.D. in physical chemistry at the University of Debrecen. He has a D.Sc. degree of radiochemistry from the Hungarian Academy of Sciences. He has more than 50 years' experience in nuclear and radiochemistry teaching. His research interest is the study of the interfacial processes of natural sorbents, including soils, rocks, clay minerals mainly by radioactive tracer methods. Recently, he has dealt with the principal studies of nuclear waste storage. He has written or co-written numerous peer-reviewed articles and is the co-author of four books in the fields of nuclear and radiochemistry as well as the interfacial chemistry of geological formations.Noémi M. Nagy is the professor of radiochemistry in the Isotope Laboratory of Colloid and Environmental Chemistry, University of Debrecen, Hungary. She received his M.Sc. and Ph.D. in radiochemistry at the University of Debrecen. She has a D.Sc. degree of agrochemistry from the Hungarian Academy of Sciences. She has approximately 30 years' experience in nuclear and radiochemistry teaching. Her research interest is the study of the interfacial processes of natural sorbents, including soils, rocks, clay minerals mainly by radioactive tracer methods. Recently, she has dealt with the principal studies of nuclear waste storage. She has written or co-written numerous peer-reviewed articles and is the co-author four books in the fields of nuclear and radiochemistry as well as the interfacial chemistry of geological formations.