Polycyclic Aromatic Hydrocarbons in Total Suspended Particulate of Niterói, RJ, Brazil: A Comparison of Summer and Winter Samples

Polycyclic Aromatic Hydrocarbons and their Molecular Diagnostic Ratios in Airborne Particles (PM10) Collected in Rio de Janeiro, Brazil

“…In general, PAHs concentrations determined in this work are 5-10 times lower than reported values for PAHs in total particulate matter in Rio de Janeiro (Lopes & Andrade, 1996;Pereira Netto et al, 2002a;Pereira Netto et al, 2002b). According to literature data particle bound PAHs are mostly associated with the fine size particles, typically 0.5 μm or less (Baek et al, 1991a;Baek, Goldstone, Kirk, Lester, & Perry, 1991b;De Martinis et al, 2002;Venkataraman, Lyons, & Friedlander, 1994).…”

Simultaneous evaluation of polycyclic aromatic hydrocarbons and carbonyl compounds in the atmosphere of Niterói City, RJ, Brazil

“…This fact agrees well with previous data of PAH concentrations bond to TSP in Niter oi (Pereira Netto et al, 2001, 2002aLima and Pereira Netto, 2009) and Rio de Janeiro City (Quit erio (Panther et al, 1999) described a seasonal variation in tropical or temperate cities related to deposition processes. PC1 and PC2 described 21.4% and 16.5% respectively of the total variance (summing only 37.9% of it) of CC associated with TSP.…”

“…Vehicular emission was previously assigned as the main source of atmospheric PAH in Niter oi City (Pereira Netto et al, 2001, 2002aLima and Pereira Netto, 2009 The ratios of the concentrations of certain PAH have been used for source apportionment (IPCS, 1998;Ravindra et al, 2008;Marques et al, 2009). Therefore, the similar ratios found in PM10 and TSP (Table 2) would indicate similar emission sources.…”

“…Another question is concerned with the lack of seasonal variation of the concentrations of atmospheric PAH in tropical areas with regard to meteorological parameters such as temperature and relative humidity (Dallarosa et al, 2005, Quit erio et al, 2007Vasconcellos et al, 2010;Pereira Netto et al, 2002a;Lima and Pereira Netto, 2009), when compared to cold or temperate areas. However, Panther et al (1999) and Dallarosa et al (2005) reported that the major factor affecting PAH levels in tropical cities are the atmospheric deposition processes.…”

Spatial distribution of polycyclic aromatic hydrocarbons in Terminalia catappa L. (Combretaceae) bark from a selected heavy road traffic area of Rio de Janeiro City, Brazil

“…Sub-samples of ∼1.5 g were precisely weighed and treated as previously described [19][20][21]. Briefly, samples were extracted in aluminum foil covered amber bechers with four portions of 20 mL of CH 2 Cl 2 during 20 min each.…”