TRePRo 2002 is the third meeting in the series of the Karlsruhe Geochemical Workshops. The first workshop was held in 1997 at the Forschungszentrum Karlsruhe. Its main topic was 'Geochemical Modelling - Radio Toxic and Chemical Toxic Substances in Natural Aquatic Systems'. The second workshop was held in 1999 in Speyer focusing on 'Mineral / Water Interactions Close to Equilibrium'. The present workshop was jointly organized by Institut fuer Nukleare Entsorgung, Forschungszentrum Karlsruhe (FZK-INE) and Labor fuer Endlagersicherheit, Paul Scherrer Institut (PSI-LES). This book of abstracts contains the contributions presented at TRePro 2002 held at the Forschungszentrum Karlsruhe, March 20-21, 2002. The organizing committee thanks all the authors for their efforts to prepare their extended abstracts in advance of the workshop. Moreover, we would like to thank the numerous persons behind the scenes who contributed in whatever way to the workshop. Especially, the support by FZK-INE director Prof. J.-I. Kim and PSI-LES director Prof. J. Hadermann is acknowledged. Special thanks are also due to Mrs. G. Endress for her administrative assistance. (orig.)Available from TIB Hannover: ZA 5141(6721) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman