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CONTAMINANTS AND REMEDIAL OPTIONS AT PESTICIDE SITES
Koustas, R., R. Singhvi, AND M. Mohn. CONTAMINANTS AND REMEDIAL OPTIONS AT PESTICIDE SITES. 1994.
Many types of soils, sediments, and sludges are contaminated with a wide variety of pesticides. ite-specific characteristics such as volume to be treated, extent of contamination, and applicable cleanup goals differ greatly, and contaminant toxicity, migration pathways, persistence, and rate of transport from a site must all be considered when selecting a remediation strategy. nowledge of the physical and chemical properties of the pesticide(s) is also necessary for effective remediation. he U.S. Environmental Protection Agency (EPA) has developed a pesticide categorization method consisting of four groups, each of which contains pesticides of similar functionalities that exhibit common physical and chemical properties. ubstrates within a particular group should respond similarly to a particular remedial treatment technology. he four pesticide classification groups include: 1) inorganic compounds; 2) halogenated water insoluble organic compounds; 3) halogenated sparingly water soluble organics and organo-linked compounds; and 4) nonhalogenated organics and organo-linked compounds. echnologies available for the remediation of the pesticides include immobilization, destruction, and separation/ concentration. mmobilization technologies minimize or prevent the migration of contaminants by utilizing physical barriers to inhibit movement; they provide no detoxification. hese technologies include containment (capping and vertical/horizontal barriers), stabilization/solidification (S/S), and vitrification. estruction technologies reduce or eliminate toxicity, and include thermal (incineration), chemical, and biological methods. eparation/ concentration technologies use physical or chemical means to remove contaminants from the matrix for further treatment and for contaminant volume reduction. hese technologies include radio frequency (RF) heating, soil washing, thermal desorption, and solvent extraction.