Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans are known to form from anthropogenic sources, such as fuel oil burning and municipal waste incineration. Fly ash formed in waste incinerators contains metal oxide nanoparticles (MOX), such as NiO and CuO. In this study, NiO, CuO, and NiO-CuO nanoparticles were prepared by impregnating silica with methanolic solutions of metal ion-dendrimer complexes with their subsequent calcination. Supported MOX nanoparticles were exposed to an organic precursor (1,2-dichlorobenzene) under pyrolytic conditions of varying nature and the products were analyzed using GC-MS. Both NiO and CuO formed dibenzo-p-dioxin and chlorodibenzo-dioxin at all temperatures studied. Interestingly, dibenzofuran and dichlorodibenzofuran were observed only with CuO. The effect of bimetallic MOX nanoparticles (NiO-CuO) on product type and yield, in comparison to those from isolated NiO and CuO particles, will be discussed.

Mediated formation of PCDD/Fs from combustion-generated nanoparticle surrogates based on NiO, CuO, and NiO-CuO nanoparticles supported on silica

245th National Meeting (2013)

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