Atmospheric particulate matter (PM) is one of the main causes of concern for adverse effects of pollution on human health. This because it has a very heterogeneous chemical and morphological composition and it is involved in different mechanisms of toxicity, several of them are not yet fully understood. Recent studies show that some of the negative health effects can be linked to the oxidative potential (OP) of PM which leads to high concentrations of Reactive Oxygen Species (ROS) capable of causing oxidative stress at the cellular level. Several studies have been focused on the evaluation of the contribution of specific aerosol sources to OP, however, long-term studies are very scarce in Italy. In this work, seasonal variability of OP is analysed focusing on the role of aerosol sources and correlation with chemical composition of PM.
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