The oxidative potential and biological effects induced by PM10 obtained in Mexico City and at a receptor site during the MILAGRO Campaign

Autor: Quintana, Raul1, Serrano, Jesús2, Gómez, Virginia3, de Foy, Benjamin4, Miranda, Javier5, Garcia-Cuellar, Claudia1, Vega, Elizabeth6, Vázquez-López, Inés1, Molina, Luisa T.7,8, Manzano-León, Natalia1, Rosas, Irma9, Osornio-Vargas, Alvaro R.1,10 osornio@ualberta.ca
Předmět:
Zdroj: Environmental Pollution. Dec2011, Vol. 159 Issue 12, p3446-3454. 9p.
Abstrakt: As part of a field campaign that studied the impact of Mexico City pollution plume at the local, sub-regional and regional levels, we studied transport-related changes in PM10 composition, oxidative potential and in vitro toxicological patterns (hemolysis, DNA degradation). We collected PM10 in Mexico City (T 0) and at a suburban-receptor site (T 1), pooled according to two observed ventilation patterns (T 0 → T 1 influence and non-influence). T 0 samples contained more Cu, Zn, and carbon whereas; T 1 samples contained more of Al, Si, P, S, and K (p < 0.05). Only increased in T 1 during the influence periods. Oxidative potential correlated with Cu/Zn content (r = 0.74; p < 0.05) but not with biological effects. T 1 PM10 induced greater hemolysis and T 0 PM10 induced greater DNA degradation. Influence/non-influence did not affect oxidative potential nor biological effects. Results indicate that ventilation patterns had little effect on intrinsic PM10 composition and toxicological potential, which suggests a significant involvement of local sources. [Copyright &y& Elsevier]
Databáze: GreenFILE
Externí odkaz: