The mobility of waterborne particulate matter plays an important role in the water quality, landscape evolution, and ecology of freshwater wetlands. In this work, we measured the surface-water transport of inorganic particles in a tracer experiment at a wetland in the Florida Everglades. Comparison of the results of this experiment to calculations of a three-dimensional transport model shows that dispersive mixing was small and that rate-limited mass-transfer reactions with emergent vegetation and periphyton substantially reduced water-column concentrations of particles.