MECHANISM OF RHABDOPHANE-(LA) AND LANTHANITE-(LA) FORMATION DURING REDUCTION OF BIOAVAILABE NUTRIENTS IN WATER BASED ON SEM AND XRD STUDY

摘要

This study presents results of SEM and XRD investigation of products formed after La-rich bentonite application into water containing PO4 (3-) and CO32- ions. The main product of the investigated reaction with phosphate and carbonate anions is rabdophane-(La) and lanthanite-(La), respectively. Studied material has adaptation in many water reservoirs only for phosphorus ions reduction. Further studies might find application in case of reduction others hazardous ions. They could be precipitated in the same fast and effective way, to other stable, nontoxic mineral phases.