Fig. 1. Research site (left) and the contaminated soil (the right top: with metal wastes; the right bottom: with metal wastesand oil wastes) for the study.
Fig. 2. Removal efficiencies of heavy metals for 1st soil washing(SPWL: Soil Pollution Warning Limit).
Fig. 3. Removal efficiencies of Zn and Pb for 1st and 2nd soil washing (SPWL: Soil Pollution Warning Limit).
Fig. 4. Removal efficiencies of Pb and Zn for 1st soil washing after small particle separation (SPWL: Soil Pollution Warning Limit).
Fig. 5. Removal efficiencies of Pb and Zn for 1st soil washing after magnetic separation (SPWL: Soil Pollution Warning Limit).
Fig. 6. Removal efficiencies of TPH for 1st soil washing after magnetic separation (SPWL: Soil Pollution Warning Limit).
Table 1. Operating conditions for GC/FID and ICP/OES for analyses in this study
Table 2. The properties and TPH/heavy metal concentration of soil used in this study
Table 3. Heavy metal and TPH concentration of soil before/after particle separation and magnetic separation process
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