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EFFECT OF SOLVENTS IN WATER ON ELECTROCATALYTIC DECHLORINATION OF 2-CL BP AT A PALLADIUM MODIFIED GRANULAR-GRAPHITE ELECTRODE
Citation:
FANG, J. AND S. R. AL-ABED. EFFECT OF SOLVENTS IN WATER ON ELECTROCATALYTIC DECHLORINATION OF 2-CL BP AT A PALLADIUM MODIFIED GRANULAR-GRAPHITE ELECTRODE. Presented at 232nd American Chemical Society (ACS) National Meeting, San Francisco, CA, September 10 - 14, 2006.
Impact/Purpose:
to present information
Description:
Remediation of soils and sediments contaminated by polychlorinated biphenyls (PCBs) usually involves use of organic solvents because PCBs have very limited solubility in water. The resulting liquids require further treatment to degrade these toxic contaminants. Catalytic and electrocatalytic dechlorination of PCBs are usually conducted in solvents or water-solvent systems (Grittini et al., 1995; Kulikov et al., 1996; Tsyganok, 1999; Korte, 2002; Lowry, 2004). Study of dechlorination of PCBs by palladized iron demonstrated that the dechlorination rate was sensitive to the solvent concentration (Korte, 2002). An electrocatalytic process using a palladium modified granular-graphite electrode was developed to effectively dechlorinate mono- and di-chlorobiphenyls to biphenyl in an aqueous solution (Fang, 2004). To apply this technique to highly chlorinated biphenyls, solvents have to be added to enhance the solubility of PCBs in the electrolyte. Currently, the effects of solvent concentration on the effectiveness of dechlorination by a palladized granular-graphite electrode were studied, and some of the experimental results are reported.