ausblenden:
Schlagwörter:
-
Zusammenfassung:
Parent polycyclic aromatic hydrocarbons (PAHs), their nitrated (NPAHs) and oxygenated (OPAHs) derivatives are pollutants leading to adverse health effects due to their carcinogenicity, mutagenicity and oxidative stress potential. Many of these polycyclic aromatic compounds (PACs) are long-lived and undergo long-range atmospheric transport. PAHs have been studied and monitored in the environment since decades. In contrast, PAH derivatives are understudied despite comparable or even higher toxicity and bioaccessibility of some NPAHs and OPAHs than their parent PAHs. The air pollutants are formed during incomplete combustion processes of fossil fuels and biomass but can also be formed secondarily in the atmosphere by the reaction of parent PAHs with atmospheric oxidants. In order to understand the implication for human health, the occurrence and levels in the environment as well as the bioavailability and the negative health effects of the pollutants should be known. The concentrations of the pollutants are governed by their emission, photochemical formation, degradation and deposition, which is significantly influenced by, e.g. the gas-particle partitioning and the mass size distribution. This thesis advances the knowledge about the concentrations, cycling, fate in the atmospheric environment and adverse health effects of the PAH derivatives
