METHOD OF RENDERING HEAVY METAL-CONTAINING CONTAMINANT HARMLESS

摘要

PROBLEM TO BE SOLVED: To provide a method of rendering heavy metal-containing contaminant harmless by which the concentration of elution components of heavy metals in contaminant containing highly concentrated heavy metals like lead is reduced to equal to or less than a standard value of a soil content test and a soil elution amount test stipulated in a Soil Contamination Countermeasure Law, consequently treated objects are not disposed of in a final disposal site as in the past but recycled as civil engineering materials, and treatment can be performed at lower temperature compared to a melting method, and which is therefore superior in both viewpoints of energy consumption and cost.;SOLUTION: The method of rendering heavy metal-containing contaminant harmless is provided by which an Si-containing compound is added to Pb-containing waste before being fired in an amount of 10-50 wt.% in a constitution ratio after addition when suppressing elution of Pb by firing the Pb-containing waste.;COPYRIGHT: (C)2009,JPO&INPIT