Transport Phenomena.- Colloid Facilitated Transport in Natural Porous Media: Fundamental Phenomena and Modelling.- Influence of Na-bentonite Colloids on the Transport of Heavy Metals in Porous Media.- Colloid Transport Processes: Experimental Evidence from the Pore Scale to the Field Scale.- Transport of Colloids in Filter Columns: Laboratory and Field Experiments.- Biocolloids and Biofilms.- Colloid and Microbe Migration in Granular Environments: A Discussion of Modelling Methods.- Influence of Biofilms on Colloid Mobility in the Subsurface.- Subsurface Transport of Heavy Metals Mediated by Biosolid Colloids in Waste-Amended Soils.- Colloids and Contaminants, Engineering Aspects.- Ion - Colloid - Colloid Interactions.- Release of Contaminants from Bottom Ashes - Colloid Facilitated Transport and Colloid Trace Analysis by Means of Laser-Induced Breakdown Detection (LIBD).- The Role of Colloid Transport in Metal Roof Runoff Treatment.