Process for the detoxification treatment of hazardous wastes.

摘要

A process for producing a non-hazardous sludge from an aqueous solution which contains heavy metals comprising the steps of: (a) adding phosphoric acid or an acid phosphate salt to the aqueous solution to percipitate the heavy metals (b) lowering the pH of the solution to less than about 5.0 (c) adding a coagulant to the solution (d) raising the pH of the solution to above about 7.0 by the addition of a calcium source and (e) dewatering the resulting non-hazardous sludge.