AI Article Synopsis
- A study in Taiyuan city analyzed PM2.5 during the heating season to understand heavy metal concentrations and their ecological risks, finding that major elements included Si, Ca, Al, Na, Mg, K, and Fe.
- The main contributors to PM2.5 pollution were identified as soil dust (43.46%), coal burning (15.69%), vehicle emissions (13.41%), industrial dust (9.89%), and construction cement dust (9.03%).
- The ecological risk from heavy metals was high, especially for children, with potential non-carcinogenic health risks linked primarily to respiratory inhalation, and metals were ranked in order of risk from Cd to Mn
Article Abstract
The fine particulate matter (PM2.5) sampled during heating season in Taiyuan city and nineteen samples were used to investigate elemental concentrations and its source potential ecological risks of heavy metals, and to assess human exposure and health risk. The result indicated that main elements were Si, Ca, Al, Na, Mg, K, Fe in PM2.5. The main sources of elements in PM2.5 were divided into five categories including soil dust (43.46%), coal burning (15.69%), vehicle emission (13.41%), industrial dust (9.89%) and the construction cement dust (9.03%). Moreover, the order of potential ecological risk index of heavy metals in PM2.5 was Cd > Ni > Hg > Pb > Cu > Zn > As > Co > Cr > Mn, and the ecological hazards were high. The main exposure of heavy metals in atmosphere was respiratory inhalation . The exposure quantity for children was significantly higher than that for adult. The hazard index values suggested a potential non-carcinogenic risk in PM2.5.
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