Formation of dioxins and furans in waste incineration residues from structurally formatting PAH precursor molecules

环境中的二恶英(PCDD-多氯二苯并二恶英)和呋喃(PCDF-多氯二苯并呋喃)问题引起了公众的极大关注。它们与城市固体废物焚烧排放的联系极大地促进了围绕该技术的公众可接受性的辩论。我们花了数年时间研究多氯二苯并二恶英/多氯二苯并呋喃在垃圾焚化炉中对飞灰的反应。显然，多氯二苯并二恶英/多氯二苯并呋喃是通过前体化合物的反应或涉及碳的从头合成在飞灰上形成的。多氯二苯并二恶英/多氯二苯并呋喃的形成是一个极其复杂的机制，需要进一步研究。本研究的目的是研究一系列多环芳烃(PAH)和含氧多环芳烃(PAH)的化学结构，以确定这些化合物作为潜在的“前体”分子在飞灰中形成PCDD/PCDF的影响。这些数据对于了解多氯二苯并二恶英/多氯二苯并呋喃的形成机制很重要，因此对于制定步长变化控制战略以消除或减少飞灰和空气污染控制残留物中多氯二苯并二恶英/多氯二苯并呋喃的形成至关重要。

The issue of dioxins (PCDD- polychlorinated dibenzodioxins) and furans (PCDF- polychlorinated dibenzofurans) in the environment are of considerable public concern. Their association with emissions from municipal solid waste incineration contributing significantly to the debate surrounding the public acceptability of the technology. We have spent several years investigating the reactions of PCDD/PCDF on flyash in waste incinerators. It is clear that PCDD/PCDF are formed on flyash by reactions of precursor compounds or by de novo synthesis involving carbon. The formation of PCDD/PCDF is an extremely complex mechanism, requiring further research. The aim of this present research proposal is to investigate a range of polycyclic aromatic hydrocarbons (PAH) and oxygenated PAH to determine the influence of the chemical structure of those compounds as potential 'precursor' molecules for the formation of PCDD/PCDF in flyash. This data is important in understanding the formation mechanisms of PCDD/PCDF and hence is key to the development of step change control strategies for the elimination or reduction of PCDD/PCDF formation in flyash and air pollution control residues.