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SUBSTITUTION REACTIONS FOR THE DETOXIFICATION OF HAZARDOUS CHEMICALS
Citation:
Kawahara*, F K. SUBSTITUTION REACTIONS FOR THE DETOXIFICATION OF HAZARDOUS CHEMICALS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-98/124 (NTIS PB98-177876), 1998.
Impact/Purpose:
information
Description:
Chemical Treatment is one of several treatment techniques used for the remediation of toxic and hazardous chemicals. Chemical treatment in this report is defined as substitution of halogens by hydrogens for the conversion of halogenated organic toxicant into its native hydrocarbon or the mineralization to carbon dioxide, water, and other components. Within the category of chemical substitution, the superoxide ion radical reactions, the transformation of polyhaloaromatics and polyhaloalkanes involving dehalogenations with polyethylene glycols and base, and the catalytic hydrogen transfer reactions will be discussed.
This publication reports on the literature findings for the chemistry of superoxide ion radical; it relates the methods of preparation, and its detection and reactions with chloroaromatics. The literature findings on the destruction of PCBs, etc., with polyethylene glycol are examined; and the role of polyethylene glycol as a phase transfer agent in a basic medium and as a nucleophilic agent is discussed. In addition, a reaction mechanism for the BCD process of the EPA is given. Effects of various reaction parameters are noted. Finally, assessments of various processes are given.
