title: Destruction of polychlorinated naphthalenes by a high-temperature melting treatment (GeoMelt process).
abstract: A series of treatment experiments were carried out to evaluate the applicability of a high-temperature melting treatment (GeoMelt process) to the destruction of polychlorinated naphthalene (PCN) formulation. We started with 10-kg-scale experiments in which a small melting furnace was used and then scaled up to a 1-t-scale experiment in which a melting furnace that resembled an actual treatment system was used. These runs were evaluated whether destruction efficiency (DE) of total PCNs was more than 99.999% and whether concentrations of PCNs and polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDDs/DFs) in vitrified materials, emission gas, and scrubber water were below the target levels. Because DE values and the target levels of PCNs and PCDDs/DFs in these runs were satisfactory, then we carried out a demonstrative experiment using the actual treatment system and confirmed destruction of PCNs. Based on good results of the demonstrative experiment, stock of PCN formulation was successfully treated continuously.
authors.affiliation: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan, tyama@nies.go.jp.
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Yasufumi
authors.initials: Y
authors.lastname: Kai
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Nakauchi
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Abuku
authors.forename: Yukio
authors.initials: Y
authors.lastname: Noma
mesh_terms: D001572:Benzofurans / Q000032:analysis / Q000737:chemistry*; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins / Q000032:analysis / Q000737:chemistry*; D004867:Equipment Design; D006358:Hot Temperature; D017745:Incineration / Q000295:instrumentation / Q000379:methods*; D009281:Naphthalenes / Q000032:analysis / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000737:chemistry*
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins; D009281:Naphthalenes; C031721:naphthalene; D011078:Polychlorinated Biphenyls; C020887:dibenzo(1,4)dioxin