| 摘要 |
The invention relates to a method for the treatment of waste contaminated with heavy metals. Said contaminants are rendered inert by carrying out the following steps: determination of the acidity of the contaminated material, partial neutralisation of the material if the latter is acid, the addition of a solution of orthophosphoric acid and an alkali metal salt thereof in water, forming a homogeneous paste from the mixture formed, the addition of calcium oxide (CaO) and/or calcium hydroxide (Ca(OH)2) to the paste, and allowing the paste to dry in the air. The material thus obtained is suitable for storage in accordance with local environmental legislation. |
