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

环境中的二恶英（PCDD）和呋喃（PCDF）是公众非常关注的问题。它们与城市固体废物焚烧排放的关联，极大地促进了围绕该技术的公众可接受性的辩论。我们花了几年的时间研究PCDD/PCDF在垃圾焚烧炉飞灰上的反应。很明显，PCDD/PCDF是在粉煤灰上通过前体化合物的反应或涉及碳的从头合成而形成的。PCDD/PCDF的形成机制极其复杂，有待进一步研究。本研究计划的目的是研究一系列多环芳烃（PAH）和含氧多环芳烃，以确定这些化合物的化学结构作为潜在的“前体”分子对粉煤灰中PCDD/PCDF形成的影响。这些数据对于理解PCDD/PCDF的形成机制具有重要意义，因此对于制定消除或减少飞灰和空气污染控制残留物中PCDD/PCDF形成的阶跃变化控制策略至关重要。

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.