Adsorption Characteristics of Dioxins on Various Adsorbents

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 exhaus...

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Published inJournal of Environmental Chemistry Vol. 13; no. 1; pp. 155 - 164
Main Authors YAMASHITA, Masazumi, WAKIMOTO, Tadaaki, HONDA, Katsuhisa, TATSUKAWA, Ryo
Format Journal Article
LanguageEnglish
Published Japan Society for Environmental Chemistry 2003
Subjects
Activated alumina
Activated carbon
Artificial zeolite
Polychlorinated dibenzo-p-dioxins
Polychlorinated dibenzofurans
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Summary: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.
ISSN:0917-2408
1882-5818
DOI:10.5985/jec.13.155