2003 Volume 13 Issue 1 Pages 155-164
In this study, removal efficiency and adsorption characteristics of dioxins (polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans=PCDD/DF) were investigated in principal adsorbents (an artificial zeolite derived from fly ash, activated alumina and activated carbon) equipped in the exhaust gas line of a small size incinerator. In any adsorbents, the removal rate of vapor PCDD/DF was over 95 percent, and relatively low in lower chlorinated PCDD/DF-congeners. These data suggest that the adsorption mechanism is mainly due to physical adsorption.Furthermore, in activated alumina, a significant positive correlation (p<0.01) was found between the removal rate and the retention time on polar column (SP-2331) on vapor PCDD/DF-isomers and, suggest that the removal rate of vapor PCDD/DF-isomers was affected by the interaction between dioxins and polar sites of adsorbent.
