title: Supercritical water oxidation of dioxins and furans in waste incinerator fly ash, sewage sludge and industrial soil.
abstract: Three environmental samples containing dioxins and furans have been oxidized in the presence of hydrogen peroxide under supercritical water oxidation conditions. The samples consisted of a waste incinerator fly ash, sewage sludge and contaminated industrial soil. The reactor system was a batch, autoclave reactor operated at temperatures between 350 degrees C and 450degrees C, corresponding to pressures of approximately 20-33.5 MPa and with hydrogen peroxide concentrations from 0.0 to 11.25 vol%. Hydrogen peroxide concentration and temperature/pressure had a strong positive effect on the oxidation of dioxins and furans. At the highest temperatures and pressure of supercritical water oxidation of 4500C and 33.5 MPa and with 11.25 vol% of hydrogen peroxide, the destruction efficiencies of the individual polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans (PCDD/PCDF) isomers were between 90% and 99%. There did not appear to be any significant differences in the PCDD/PCDF destruction efficiencies in relation to the different sample matrices of the waste incinerator fly ash, sewage sludge and contaminated industrial soil.
authors: Safari
authors: S
authors: Zainal
authors: Jude A
authors: JA
authors: Onwudili
authors: Paul T
authors: PT
authors: Williams
mesh_terms: D060729:Coal Ash / Q000737:chemistry; D004147:Dioxins / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry*; D005663:Furans / Q000737:chemistry*; D007220:Industrial Waste; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry; D012987:Soil / Q000737:chemistry
chemical_list: D060729:Coal Ash; D004147:Dioxins; D004785:Environmental Pollutants; D005663:Furans; D007220:Industrial Waste; D012722:Sewage; D012987:Soil