title: Removal of PCBs and HCB from contaminated solids using a novel successive self-propagated sintering process.
abstract: Thermal treatments are the primary technologies used to remove persistent organic pollutants from contaminated solids. The high energy consumption during continuous heating, required cost for treating the exhaust gas, and potential formation of secondary pollutants during combustion have prevented their implementation. A novel successive self-propagated sintering process was proposed for removing polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) from contaminated solids in a low-cost and environmentally friendly way. Nine laboratory-scale experiments involving different initial concentrations of pollutants and solid compositions were performed. Almost all PCBs (>99%) and HCB (>97%) were removed from solids under constant experimental conditions. Varying initial concentrations of PCBs and HCB in the contaminated solids did not influence the removal efficiency of the pollutants; however, the degradation efficiency of pollutants increased as their initial concentrations increased. Although varying levels of PCDD/Fs were detected in the effluent gas, they were all within the emission standard limit.
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8, Beijing, 100012, People's Republic of China. zhaolong1227@126.com.
authors.forename: Long
authors.initials: L
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8, Beijing, 100012, People's Republic of China.
authors.forename: Tengfei
authors.initials: T
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8, Beijing, 100012, People's Republic of China. houhong@craes.org.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Hou
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8, Beijing, 100012, People's Republic of China.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Qin
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8, Beijing, 100012, People's Republic of China.
authors.forename: Fasheng
authors.initials: F
authors.lastname: Li
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Terada
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Hosomi
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000302:isolation & purification; D001572:Benzofurans / Q000302:isolation & purification; D002606:Charcoal / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000191:economics / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D006581:Hexachlorobenzene / Q000302:isolation & purification*; D006358:Hot Temperature; D011078:Polychlorinated Biphenyls / Q000302:isolation & purification*; D000072317:Polychlorinated Dibenzodioxins / Q000302:isolation & purification; D011137:Polystyrenes / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000302:isolation & purification*
chemical_list: D000393:Air Pollutants; D001572:Benzofurans; D000072317:Polychlorinated Dibenzodioxins; D011137:Polystyrenes; D012987:Soil; D012989:Soil Pollutants; D002606:Charcoal; D006581:Hexachlorobenzene; C003771:Amberlite XAD-2 resin; D011078:Polychlorinated Biphenyls
keywords: Charcoal; Low cost; Remediation technology; Successive self-propagated sintering (SSPS); Toxic equivalent quantity (TEQ)