Oxidative potential (OP) of ambient particulate matter (PM) is a measure of the ability of PM to produces remarkable concentrations of reactive oxygen species (ROS) that could lead to oxidative stress in humans. Therefore, OP is a possible measure of PM biological reactivity. When the amount of ROS exceeds the neutralizing capacity of antioxidant compounds, other cellular components can be involved in the oxidation process, which finally could result in health issues. Indeed, the harmful process can be activated, although human body is capable of react to ROS, in case defence mechanisms are debilitated by diseases. The aim of this study was to investigate the seasonal trends of OP measured in two size fractions and how this is influenced by carbon content. Daily (November 2016-November 2017) PM2.5 and PM10 samples were simultaneously collected, on quartz substrates, using a dual channel low-volume (2.3 m3 /h) sampler (SWAM, Fai Instruments). Sampling was carried out at the Environmental-Climate Observatory of Lecce (Italy), a regional station being part of the Global Atmosphere Watch (GAW-WMO) network (Fig. 1). It is basically an urban background station, being placed at 4 km from the town of Lecce and between 30 km and 80 km from large industrial sites of Brindisi and Taranto (Cesari et al., 2017). Roughly one sample every three was selected for carbon content analysis and OP determination
. Oxidative Potential Characterization of water-soluble fraction of PM and PM in an urban background site in Southern Italy: influence of the carbon content.
M. R. Guascito;
2019-01-01
Abstract
Oxidative potential (OP) of ambient particulate matter (PM) is a measure of the ability of PM to produces remarkable concentrations of reactive oxygen species (ROS) that could lead to oxidative stress in humans. Therefore, OP is a possible measure of PM biological reactivity. When the amount of ROS exceeds the neutralizing capacity of antioxidant compounds, other cellular components can be involved in the oxidation process, which finally could result in health issues. Indeed, the harmful process can be activated, although human body is capable of react to ROS, in case defence mechanisms are debilitated by diseases. The aim of this study was to investigate the seasonal trends of OP measured in two size fractions and how this is influenced by carbon content. Daily (November 2016-November 2017) PM2.5 and PM10 samples were simultaneously collected, on quartz substrates, using a dual channel low-volume (2.3 m3 /h) sampler (SWAM, Fai Instruments). Sampling was carried out at the Environmental-Climate Observatory of Lecce (Italy), a regional station being part of the Global Atmosphere Watch (GAW-WMO) network (Fig. 1). It is basically an urban background station, being placed at 4 km from the town of Lecce and between 30 km and 80 km from large industrial sites of Brindisi and Taranto (Cesari et al., 2017). Roughly one sample every three was selected for carbon content analysis and OP determinationI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
