Development of a technique for using 99mTc as an adsorbable tracer for hydrodynamic studies of fine sediments in suspension

Abstract

Labelling of fine sediment with 99mTc was achieved through laboratory experiments described in a previous work . Comparative studies of the hydrodynamic behaviour of the labelled and unlabelled sediment, in order to validate the application of the labelled sediment in the field stuies, were further performed by means of sedimentation tests using the Andrease pipette technique, and are presented here. Labelling without flocculation, which promotes the same sedimentation behaviour of the labelled and the natural sediment was only achieved using small quantities of SnCl2 dissolved in proportionately small volumes of HCl (0.3