Open landfill dumping areas for municipal wastes in Asian developing countries have recently received particular attention with regard to environmental pollution problems. Because of the uncontrolled burning of solid wastes, elevated contamination by various toxic chemicals including dioxins and related compounds in these dumping sites has been anticipated. In this study, concentrations of poly...

The aim of this study was to investigate (i) the behavior of native PBDEs during UV irradiation in different media, (ii) the possibility of their transformation into hydroxylated PBDEs in aqueous media, and (iii) the photochemistry/levels of brominated dioxins/furans formed from hydroxylated PBDEs. Debromination leading to the formation of a wide range of low-brominated congeners was the main p...

Within the last two decades tremendous efforts have been made to uncover the potential risks to human health associated with exposure to polychlorinated dibenzop-dioxins and polychlorinated dibenzofurans (PCDD/PCDF), especially for the general population exposed at background levels. Very few other chemicals have been investigated as intensively as these substances, in particular, the most toxi...

Introduction EPA Methods 1613 (Tetrathrough Octa-Chlorinated Dioxins and Furans by Isotope Dilution HRGC/HRMS) and 8290a [Polychlorinated Dibenzodioxins(PCDDs) and Polychlorinated Dibenzofurans (PCDFs) By High Resolution Gas Chromatography/High Resolution Mass Spectrometry (HRGC/HRMS)] specify the use of a 60m 5% diphenyl 95% dimethyl polysiloxane GC column (e.g. DB-5, Rxi-5ms) for 2378 TCDD is...

Occupational exposure to certain polychlorinated aromatic hydrocarbons such as dioxins has been suggested to cause chloracne which is a kind of skin disease. The molecular mechanisms of dioxin-mediated chloracne have not been clarified. It is possible that dioxins contribute to the pathogenesis through activation of aryl-hydrocarbon receptor (AhR)-mediated transcription and downstream genes suc...