Santiago Esplugas is Full Professor of Chemical Engineering at “Universitat de Barcelona”. He has been visiting professor at various Universities in Argentina, the UK, and the US. He does research in Advanced Oxidation Technologies for water reuse and Photochemical Reaction Engineering with special focus in pollution abatement. He is associate editor of J. Hazard. Mater., J. Environ. Chem. Eng., and member of the board of SEQUI and IOA.