METHOD FOR TREATING SOILS CONTAMINATED BY HEAVY METALS USING REDUCTION SLAG ABSORBENT

摘要

PURPOSE: A purification method of heavy metal polluted soil using reduction slag absorbent is provided to improve absorption to heavy metals by using reduction slag from an electric furnace. CONSTITUTION: A purification method of heavy metal polluted soil includes the following: reduction slag absorbent is prepared; heavy metal polluted soil is washed with washing liquid; the washed soil is classified by particle sizes; washing liquid and reduction slag absorbent are added into the classified soil to be stirred and absorbed; the reduction slag absorbent and the soil are separated after the stirring and absorbent reaction. [Reference numerals] (AA) Heavy metal polluted soil; (BB) Washing liquid; (CC) Purified soil; (DD) Screen of 1mm; (EE) Reduction slag; (FF) Particle size classification; (GG) Carrying acid; (HH) Carrying base; (II) Drying/plasticizing; (JJ) Settling bath; (KK) Absorber; (LL) Neutralization; (MM) Settling bath; (NN) Screen of 1mm; (OO) Desorption; (PP) Waste absorber