Dechlorination subcritical water

Kubatova A, AJM Lagadec, SB Hawthorne (2002) Dechlorination of lindane, dieldrin, tetrachloroethane, trichloroethene and PVC in subcritical water. Environ Sci Technol 36 1337-1343. 

The use of subcritical water extends beyond destruction. A method for remediation of PCB-contaminated soil and sediments has been described that uses zerovalent iron as the dechlorination agent and subcritical water extraction (SWE) as the transporting medium. The initial findings indicate that this technique may be a viable method for remediation of PCB-contaminated soil and sediments (Yak et al., 1999). 

Yak HK, Wenclawiak BW, Cheng IF, Doyle JG, Wai CM. Reductive dechlorination of polychlorinated biphenyls by zerovalent iron in subcritical water. Environ Sci Technol 1999 33 1307-1310. 

Kluyev, N., Cheleptchikov, A., Brodsky, E., Soyfer, V. and Zhilnikov, V. (2002) Reductive dechlorination of polychlorinated dibenzo-p-dioxins by zerovalent iron in subcritical water. Chemosphere 46,1191-1193. 

The one solvent that would be less expensive than SCCO2 would be water. We have evaluated subcritical water (SCH2O) as a medium to dechlorinate PCP. In batch trials at 200 °C, complete dechlorination of O.S mg PCP was achieved after 20h of reaction with (Table S) but recoveries remained incomplete. 

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