Dechlorination/hydrogenation and destruction reactions of PCDDs in OCDD-added fly ash heated under vacuum.
作者： Youhei Misaka , Tsuyoshi Abe , Kazuhiko Takeuchi , Kazuo Ohba , Kyoichi Sawabe
DOI: 10.1016/J.CHEMOSPHERE.2006.01.079
关键词:
摘要: Abstract Octachlorodibenzo-p-dioxin (OCDD)-added, pretreated fly ash was heated under vacuum at sample temperatures ranging from Ts = 450 to 650 K. The and liquid nitrogen-cooled trap samples were analyzed for DD/DF through OCDD/DF. total amounts of DD OCDD decrease with increasing Ts, which indicates that dechlorination/hydrogenation (DCH) reactions are not the only reaction channels. Reduction toxic equivalent (TEQ) PCDDs by more than 99% achieved in heat treatment Ts = 650 K 4 h. amount detected relative added about 17%, i.e., adsorbed surfaces can evaporate into gaseous phase. difference between evaporation behavior present previous studies is discussed light their states existence.
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