Chemical Characterization And Catalytic Hydrodehalogenation Of Complex Persistent Polyhalogenated Organic Compounds

The fly ash from municipal solid waste incineration which is a typical complex environmental sample (CES) contains many polyhalogenated aromatic compounds, the chemical characterization of which is very difficult because there exist so many kinds of compounds, a large number of congeners and large differences in concentrations between some congeners. In this dissertation, the complex sample was analyzed by various methods, such as GC/ECD, GC/MS and catalytic hydrodehalogenation. Besides, a chemical characterization method for unknown components in CES was developed.The method for obtaining the GC retention parameters of components under temperature programs was studied, so the unknown sample could be transferred to the GC-known sample. More than 500 resolved peaks of unknown components in a fly ash extract were obtained by using the method of curve fitting for GC chromatograms. Based on the laws of peak shape and the method of curve-fitting quantification, the overlapping peaks of unknown components were traced and identified under three temperature program conditions. The chromatographic parameters (A and B values) of unknown components in CES were calculated. The predicted and experimental values were in good agreement with errors less than 3 s generally.The organic components were analyzed by GC/MS. Further, the composition of CES was simplified by the method of Pd/C catalytic...