A method for remediation of PCB-contaminated soil and sediments is described that uses zerovalent iron as the dechlorination agent and subcritical water extraction (SWE) as the transporting medium. By using 100-mesh iron powder and SWE conditionsof 250℃ and 10 MPa on Aroclor 1260 for 1-8 h, the higher chlorine-substituted homologues were completely reduced to their lower-substituted counterparts. The lower-substituted congeners were subsequently near-completely dechlorinated. The initialfindings indicate that this technique may be a viable method for remediation of PCB-contaminated soil and sediments.
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