TAILIEUCHUNG - Air Pollution Part 5

Tham khảo tài liệu 'air pollution part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Polycyclic Aromatic Hydrocarbons in the Urban Atmosphere of Mexico City 93 7. Comparison of the level of PAHs in other countries The data for PAH concentrations in PST and PM10 are lower than those measured in Shijiazhuang China Feng et al 2007 and New Delhi India Dhruv 2003 they are similar to those found in Seoul Korea Jakarta Xiamen China and Bangkok Thailand Panther et al 1999 Hong et al. 2007 Thongsanit et al. 2003 but are significantly higher than those observed in Italy Menichini et al. 1999 London Kendall et al. 2001 Gran Canaria 2003 Greece Kalaitzoglou et al. 2004 and California USA Miguel et al. 2004 . Table 7 presents a comparison of the PAHs associated to at different cities in the world where it is possible observe that concentrations of PAHs in Mexico City at the CINVESTAV site are similar to those of the other Latin America city of Sao Paulo but higher than cities in the United States and Spain. Mexico USA USA Brasilb Sp inc ng m3 CINVESTAV Lompoc LA Riverside LA Sao Paulo Valencia NAP ACY . . ACE . FLU . PHE ANT . FLT PYR BAA CRY BBF BKF BAP IND DBA . BGP a Eiguren Fernandez et al. 2004 b Bourotte et al. 2005. c Viana et al 2008. Table 7. Comparison of PAH associated to in the CINVESTAV study at Mexico City with other countries. 8. Summary Several studies have been carried out in Mexico City related with the presence of airborne PAHs in vapor and particle-phase. The concentration of PAHs observed are higher than those found in the Unites States and Europe but lower than in the most polluted cities .