Pd/C-Catalyzed Hydrodechlorination of Dioxins from Fly Ash under Ambient Pressure and Temperature

This is the authors' abstract. We don't add key points for this paper.

Dioxins, such as polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), which could be efficiently extracted from fly ash based on the method approved by the Japanese Industrial Standard, were degraded by the palladium on carbon (Pd/C)-catalyzed hydrodechlorination in the presence of triethylamine at room temperature under ordinary pressure with a greater than 97% efficiency.The distinct features of the present degradation method of dioxins are its mildness, simplicity, safety, and efficiency without any expensive facilities.Polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (DL-PCBs), which are generally abbreviated as dioxins (DXNs), are categorized into a particular class of persistent chlorinated organic pollutants due to the thermal, physical, and chemical stabilities (Figure 1).The toxicity of DXNs appears through their interaction with aryl hydrocarbon receptors in human cells, inducing a variety of biological responses, such as hormone signaling and gene expression. 1 DXNs are produced as undesired byproducts during their course of waste 186 HETEROCYCLES, Vol.90, No. 1, 2015