کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4425243 | 1309098 | 2011 | 9 صفحه PDF | دانلود رایگان |

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 (T0) and at a suburban-receptor site (T1), pooled according to two observed ventilation patterns (T0 → T1 influence and non-influence). T0 samples contained more Cu, Zn, and carbon whereas; T1 samples contained more of Al, Si, P, S, and K (p < 0.05). Only SO4−2 increased in T1 during the influence periods. Oxidative potential correlated with Cu/Zn content (r = 0.74; p < 0.05) but not with biological effects. T1 PM10 induced greater hemolysis and T0 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.
► Transport-related changes in PM10 composition, oxidative potential and in vitro toxicity were studied.
► Cu, Zn, and carbon levels were predominant in urban PM10; receptor site PM10 was rich in soil elements.
► SO4−2 was the only component increased in PM10 from the receptor during the influence periods.
► PM10 oxidative potential correlates with Cu/Zn content but not with studied biological effects.
► Ventilation patterns had little effect on PM10 composition and toxicity.
Journal: Environmental Pollution - Volume 159, Issue 12, December 2011, Pages 3446–3454