Influence of temperature on PCDD/PCDF desorption from waste incineration flyash under nitrogen.
作者： Adrian M. Cunliffe , Paul T. Williams
DOI: 10.1016/J.CHEMOSPHERE.2006.06.010
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摘要: Abstract A municipal solid waste incinerator flyash was heated to between 200 and 400 °C under nitrogen in a bench-scale, static bed reactor for 4 days soak time. The influence of temperature on the levels PCDD PCDF remaining desorbed from ash were investigated using GC-MS/MS. especially formation seen 225 300 °C. Large increases I-TEQ treated relative increase its overall PCDD/PCDF content indicated that 2378-substituted congeners favoured over other substitution patterns. In absence source gaseous oxygen, mainly attributed de novo reactions involving phase oxygen. Dechlorination became increasingly important above 275 °C. Maximum desorption at 325 °C, with equivalent 35 wt% PCDD/F original being recovered exhaust traps this temperature. species M 1 CDD/CDDF-T 3 CDD/CDDF resulting dechlorination higher chlorinated PCDD/PCDF, consequently low values.
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