HYBRID TYPE SOIL WASHING METHOD USING IN-SITU COMPLEXLY CONTAMINATED SOIL AGITATION

摘要

PURPOSE: A hybrid purifying method using mixing in-situ complex polluted soil is provided to be applied to complex polluted soil by simultaneously treating oil and heavy metals, to increase purification efficiency by uniformly delivering reactants to the contaminated soil, and to prevent secondary contamination by controlling contaminants flowing into the outside of a target purification area. CONSTITUTION: A hybrid purifying method comprises the following steps: a step of mixing in-situ soil to contaminated soil(S10); a step of adding reactants including hydrogen peroxide, perfulfate and organic acid in the mixed soil(S20); and a step of extracting the contaminants in which the reaction is completed(S30). The reactants include 50-100 parts by weight of persulfate, 50-100 parts by weight of organic acid to 100 parts by weight of hydrogen peroxide. In addition, 1-5 parts by weight of propylene carbonate are mixed. [Reference numerals] (S10) Step of mixing in-situ soil to contaminated soil; (S20) Step of adding reactants in the mixed soil; (S30) Step of extracting the contaminants