Investigation of precursor reactions in the de-novo-synthesis of PCDD/PCDF on fly ash

被引：66
作者：
Stieglitz, L
Bautz, H
Roth, W
Zwick, G
机构：
来源：
CHEMOSPHERE | 1997年 / 34卷 / 5-7期
关键词：
polychlorinated dibenzodioxins; polychlorinated dibenzofurans; PCDD; PCDF; de-novo-synthesis; fly ash; carbon-13;
D O I：
10.1016/S0045-6535(97)00410-4
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
At 300 degrees C thermal experiments are performed with fly ash which had been spiked with C-12-C-13 mixtures. The resulting isotopically labeled PCDD/PCDF were analyzed by HRGC-HRMS. With PCDD besides C-12(12) and C-13(12) structures also substantial fractions of mixed species (C-12(6)-C-13(6)) were formed, indicating that dioxins are formed partly via condensation of phenyl rings. In contrast to that no such mixed species were obtained with PCDF. Consequently the synthesis of furans proceeds directs from preformed biphenyl structures. (C) 1997 Elsevier Science Ltd.
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页码：1083 / 1090
页数：8
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