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Show ,," Chanical Detoxification with APF.n. '!he APEG process was used to detoxify wastes generated at a TNOCXi treating site in Butte, M::mtana. This waste is generated as an oily phase of grOlJIXi...rater and after separation by decantation contains approxinately 3 percent pentachlorophenol (PCP) in a diesellike oil. The 1?CP-oil waste contained chlorinated dibenzo dioxin (a:>D) and furan (CDF) lxm:>logs ranging fran :,, 147 pp:> of tetra- to 84,000 pP:> of the octacangeners. Because of the preserx:e of certain potentially highly toxic (DDs and (DFs, the raw oil could oot be transported off site for incineration. .. / In the APEG process, potassiun hydroxide reacts with polyethylene glycol to fonn an alkaxide. The alkoxide in turn reacts initially with one of the chlorine atans of the (DD or a:>F roolecule to produce an ,_ . , ether am potassium chloride salt. In sane APEG reagent fornulations, dinethylsulfoxide ([MSO) is added as a cosolvent to enhance reaction rate kinetics. " '!he m:::bile field equipnent erployed at the M:mtana site carprised a 2,700-gallon batch reactor nnmted on a 45-foot trailer equipped with a boiler and cooling systan and a laboratory control roan area. Heating ~ the ratl oily waste and APED reagent mixture was achieved by the recircU1. ation of the oil and reagent through a IUI'IP, a high shear mixer, and a tube-an:i-shell heat exchanger. '!he heat transfer fluid on the shell side of the heat exchanger was heated using a boiler or cooled through a series of fin-type air coolers. '!he PCP-oil was processed in five batches, each batch consisting of appraxinately 1,400 to 1,850 gallons of waste oil together with the APID reagent. The mixture was heated to 3000F and allCMed to react for 90 minutes before cooling. The treated oil was then purrped fran the reactor into a lx>lding tank fran which carposite samples were raro.red ani sent to an analytical. laboratozy. The data indicate that all (DDs and (DFs were destroyed to con:entrations be1CM detection limits, which were, on the average, less than 1 PJ;i:>. In another application, the equiprent was trans~rted to a SuperfuIXi site in Kent, Washington, where it successfully processed 7,550 gallons of spent solvent containing an oily waste with a high rroisture content (28%) total chlorides of 20,700 ng/l, and a 2,3,7, 8-'IrnD content of 120 :pp:,. rb 2,3,7, 8-'ltDD was detected at levels higher than the detection llinit of 0.3 PJ;i:> in an;y of the processed batches. APEx:; can also be aIi>loyed to detoxify PCBs. Reagent recycle tests fran pilot plant operations were carried out during 1983-1984. Data indicate that PCB-contaminated oil (l12-200 ppn PCBs) were successfully treated with a single oose of APEG reagent. The APID process has been selected for use by the EPA Office of Pesticides and TOKic SUbstances as the teclmology for the destruction of stockpiles of banned IDB. A variant of the reagent-KTEJ3 or ~tassium tetraethylene glycolate--is the reagent of choice as proven by laboratory eJq:)erinents and kinetic . studies. A full-scale m:::bile batch unit has been 9 |