HEAVY METAL CONCENTRATION OF PM2.5 IN THE ATMOSPHERIC ENVIRONMENT OF METROPOLITAN ZONE OF MEXICO CITY
The highest mass concentration for the many elements was observed at northeast, which is one of the most heavily traffic exposed sites in Mexico City. The lowest average PM 2.5 levels were measured at Coyoacán. A positive correlation is showed between Fe, Mn and Cu as well as Se and Sn and Sb whit Tl. This relationship indicates a common source for these elements. The average concentration is compared whit those reported in urban samples from urban areas in the world.