https://scholars.lib.ntu.edu.tw/handle/123456789/425172
標題: | Effects of injected activated carbon and solidification treatment on the leachability of polychlorinated dibenzo-p-dioxins and dibenzofurans from air pollution control residues of municipal waste incineration | 作者: | HSING-CHENG HSI Wang, Lin Chi Yu, Tsung Hsien |
關鍵字: | Acetic acid | Fly ash | Humic acid | n-Hexane | PCDD/F | Stabilization | 公開日期: | 1-四月-2007 | 出版社: | PERGAMON-ELSEVIER SCIENCE LTD | 卷: | 67 | 期: | 7 | 起(迄)頁: | 1394 | 來源出版物: | Chemosphere | 摘要: | To assess the effectiveness of the injected activated carbon, cement, and sulfur-containing chelating agent in controlling polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) release from the surface of air pollution control (APC) residues, this study examined the leachability of PCDD/Fs from APC residues generated by municipal solid waste incinerators. Results showed that PCDD/Fs were stably retained in the APC residues when the samples were leached with acetic acid solution. Highly chlorinated PCDD/F homologues (i.e., hepta- and octa-CDDs and CDFs) were relatively easy to leach. The leaching percentages of PCDD/Fs from raw APC residue samples containing activated carbon were smaller than those from samples without activated carbon, especially when n-hexane was used as the leachant. These results indicate that the flue gas injected activated carbon not only controls PCDD/F emissions, but also suppresses the leachability of PCDD/Fs from the APC residues. Solidification/stabilization (S/S) processes with 30 wt% cement and 5 wt% sulfur-containing agent can additionally decrease the leachability of PCDD/Fs with humic acid. Using n-hexane as the leachant, S/S processes increased the leachability of PCDD/Fs. Various low chlorinated PCDD/F congeners were moreover leached out of the APC residue samples, markedly increasing the leachate toxicity. The enhancement of leachability and toxicity owing to S/S processes may negatively impact the environment when APC residues are exposed to nonpolar organic solvents. © 2006 Elsevier Ltd. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/425172 | ISSN: | 00456535 | DOI: | https://api.elsevier.com/content/abstract/scopus_id/33846884412 10.1016/j.chemosphere.2006.10.025 |
顯示於: | 環境工程學研究所 |
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