Distillery waste lime (a by-product from the Solvay soda process) was studied for CaCO3 content (above 90% by mass) and for amorphous Ca(OH)(2) one and used for pptn. of PO43- ions from aq. solns. The orthophosphate content was decreased from 100 mg/L down to below 5 mg/L after 90 min long treatment. The lime stored for 2 yr was less efficient than the fresh one.