scholarly journals Presence of Polycyclic Aromatic Hydrocarbons (PAHs) in Semi-Rural Environment in Mexico City

10.5772/36221 ◽  
2012 ◽  
Author(s):  
Salvador Vega ◽  
Rutilio Ortiz ◽  
Rey Gutirrez ◽  
Richard Gibson ◽  
Beatriz Schettino
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Rural Environment ◽  
Polycyclic Aromatic

scholarly journals Sources and transformations of particle-bound polycyclic aromatic hydrocarbons in Mexico City

2005 ◽  
Vol 5 (6) ◽  
pp. 12741-12773 ◽  
Author(s):  
L. C. Marr ◽  
K. Dzepina ◽  
J. L. Jimenez ◽  
F. Reisen ◽  
H. L. Bethel ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Heterogeneous Reactions ◽  
Field Campaign ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry ◽  
Polycyclic Aromatic ◽  
First Time

Abstract. Understanding sources, concentrations, and transformation of polycyclic aromatic hydrocarbons (PAHs) in the atmosphere is important because of their potent mutagenicity and carcinogenicity. The measurement of particle-bound PAHs by three different methods during the Mexico City Metropolitan Area field campaign in April 2003 presents a unique opportunity for characterization of these compounds and assessment of the methods. The three methods are (1) collection and analysis of bulk samples for time-integrated gas- and particle-phase speciation by gas chromatography/mass spectrometry; (2) aerosol photoionization for fast detection of PAHs on particles' surfaces; and (3) aerosol mass spectrometry for fast analysis of size and chemical composition. This research represents the first time aerosol mass spectrometry has been used to measure ambient PAH concentrations and the first time that fast, real-time methods have been used to quantify PAHs alongside traditional filter-based measurements in an extended field campaign. Speciated PAH measurements suggest that motor vehicles and garbage and wood burning are important sources in Mexico City. The diurnal concentration patterns captured by aerosol photoionization and aerosol mass spectrometry are generally consistent. Ambient concentrations typically peak at ~110 ng m−3 during the morning rush hour and rapidly decay due to changes in source activity patterns and dilution as the boundary layer rises, although surface-bound PAH concentrations decay faster. The more rapid decrease in surface versus bulk PAH concentrations during the late morning suggests that freshly emitted combustion-related particles are quickly coated by secondary aerosol material in Mexico City's atmosphere and may also be transformed by heterogeneous reactions.

Effects of meteorology on diurnal and nocturnal levels of priority polycyclic aromatic hydrocarbons and elemental and organic carbon in PM10 at a source and a receptor area in Mexico City

2009 ◽  
Vol 43 (17) ◽  
pp. 2693-2699 ◽  
Author(s):  
Diana Guzmán-Torres ◽  
Arantza Eiguren-Fernández ◽  
Pablo Cicero-Fernández ◽  
Marisela Maubert-Franco ◽  
Armando Retama-Hernández ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Organic Carbon ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

Seasonal variations of DNA adducts in mothers and newborns exposed to polycyclic aromatic hydrocarbons in Mexico City

2016 ◽  
Vol 259 ◽  
pp. S78
Author(s):  
J.A. Maciel-Ruiz ◽  
C. López-Rivera ◽  
R. Robles ◽  
M.G. Veloz-Martínez ◽  
P. Petrosyan ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Dna Adducts ◽  
Aromatic Hydrocarbons ◽  
Seasonal Variations ◽  
Polycyclic Aromatic

scholarly journals Polycyclic Aromatic Hydrocarbons in the Urban Atmosphere of Mexico City

Air Pollution ◽  
10.5772/10044 ◽  
2010 ◽  
Author(s):  
Violeta Mugica ◽  
Miguel Torres ◽  
Erika Salinas ◽  
Mirella Gutierrez ◽  
Roco Garc
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Urban Atmosphere ◽  
Polycyclic Aromatic

scholarly journals Spatial and temporal variability of particulate polycyclic aromatic hydrocarbons in Mexico City

2008 ◽  
Vol 8 (12) ◽  
pp. 3093-3105 ◽  
Author(s):  
D. A. Thornhill ◽  
B. de Foy ◽  
S. C. Herndon ◽  
T. B. Onasch ◽  
E. C. Wood ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Receptor Site ◽  
Active Surface Area ◽  
Spatial And Temporal Variability ◽  
Gaseous Species ◽  
Local Sources ◽  
Polycyclic Aromatic ◽  
The City

Abstract. As part of the Megacities Initiative: Local and Global Research Observations (MILAGRO) study in the Mexico City Metropolitan Area in March 2006, we measured particulate polycyclic aromatic hydrocarbons (PAHs) and other gaseous species and particulate properties, including light absorbing carbon or effective black carbon (BC), at six locations throughout the city. The measurements were intended to support the following objectives: to describe spatial and temporal patterns in PAH concentrations, to gain insight into sources and transformations of PAHs and BC, and to quantify the relationships between PAHs and other pollutants. Total particulate PAHs at the Instituto Mexicano del Petróleo (T0 supersite) located near downtown averaged 50 ng m−3, and aerosol active surface area averaged 80 mm2 m−3. PAHs were also measured on board the Aerodyne Mobile Laboratory, which visited six sites encompassing a mixture of different land uses and a range of ages of air parcels transported from the city core. A combination of analyses of time series, back trajectories, concentration fields, pollutant ratios, and correlation coefficients supports the concept of T0 as an urban source site, T1 as a receptor site with strong local sources, Pedregal and PEMEX as intermediate sites, Pico Tres Padres as a vertical receptor site, and Santa Ana as a downwind receptor site. Weak intersite correlations suggest that local sources are important and variable and that exposure to PAHs and BC cannot be represented by a single regional-scale value. The relationships between PAHs and other pollutants suggest that a variety of sources and ages of particles are present. Among carbon monoxide, nitrogen oxides (NOx), and carbon dioxide, particulate PAHs are most strongly correlated with NOx. Mexico City's PAH/BC mass ratio of 0.01 is similar to that found on a freeway loop in the Los Angeles area and approximately 8–30 times higher than that found in other cities. Evidence also suggests that primary combustion particles are rapidly coated by secondary aerosol in Mexico City. If so, their optical properties may change, and the lifetime of PAHs may be prolonged if the coating protects them against photodegradation or heterogeneous reactions.

Solvent extracted organic matter and polycyclic aromatic hydrocarbons distributed in size-segregated airborne particles in a zone of México City: Seasonal behavior and human exposure

2010 ◽  
Vol 44 (1) ◽  
pp. 122-130 ◽  
Author(s):  
Omar Amador-Muñoz ◽  
Rafael Villalobos-Pietrini ◽  
Ma. Cristina Agapito-Nadales ◽  
Zenaida Munive-Colín ◽  
Leonel Hernández-Mena ◽  
...  
Keyword(s):  
Organic Matter ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Human Exposure ◽  
Airborne Particles ◽  
Seasonal Behavior ◽  
Polycyclic Aromatic

Presence of Polycyclic Aromatic Hydrocarbons (PAHs) in Apple in Rural Terrains from Mexico City

2010 ◽  
Vol 85 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Rutilio Ortiz Salinas ◽  
Gilberto Díaz González ◽  
Beatriz Schettino Bermudez ◽  
Rey Gutiérrez Tolentino ◽  
Salvador Vega y León
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

Induction of c-Jun by air particulate matter (PM10) of Mexico city: Participation of polycyclic aromatic hydrocarbons

2015 ◽  
Vol 203 ◽  
pp. 175-182 ◽  
Author(s):  
Martha Estela Salcido-Neyoy ◽  
Yesennia Sánchez-Pérez ◽  
Alvaro Román Osornio-Vargas ◽  
María Eugenia Gonsebatt ◽  
Jorge Meléndez-Zajgla ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Particulate Matter ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Air Particulate Matter ◽  
Air Particulate ◽  
Polycyclic Aromatic

scholarly journals Benzo[ghi]perylene Induces Morphological and Genotoxic Effects in Human Bronchial Cells Independently of The AhR Pathway

2021 ◽  
Author(s):  
Zelmy Castro-Gálvez ◽  
Montserrat Zaragoza-Ojeda ◽  
Abrahan Hernández-Hernández ◽  
Francisco Arenas-Huertero
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Mexico City ◽  
Aromatic Hydrocarbons ◽  
Morphological Changes ◽  
Genotoxic Effects ◽  
Aryl Hydrocarbon ◽  
Cellular Changes ◽  
Polycyclic Aromatic ◽  
In Cells ◽  
Bronchial Cells

Abstract Polycyclic aromatic hydrocarbons (PAH) are organic compounds found in the contaminated atmosphere of Mexico City, where the PAH present with highest concentration is benzo[ghi]perylene [B[ghi]p]. We recently demonstrated that double-stranded breaks in DNA appear after 3h of exposure, whereas cellular changes and activation of aryl hydrocarbon receptor (AHR) pathway occur after 48h in bronchial cells under exposure to B[ghi]p, these findings have led us to explore if the AHR pathway participates in morphological changes and genotoxic effects due to B[ghi]p in human NL-20 bronchial cells. Cells of the NL-20 human bronchial line were exposed to B[ghi]p in the presence, or absence, of the AHR receptor antagonist, CH-223191. Cell viability was quantified by the MTT assay, which revealed 76 and 66% at 6h and 24h, respectively (p<0.001), regardless of the presence of CH-223191. RT-qPCR showed an increase in the expression of the AHR and CYP1A1 cytochrome genes only after 24h of exposure, and the expression was inhibited by CH-223191. Genotoxicity assays revealed the presence of comets, nuclear buds (NB) and DNA fragmentation in cells exposed to B[ghi]p after 6h and in cells exposed to B[ghi]p plus CH-223191 at 24h. These results verify that B[ghi]p induces morphological and genotoxic effects, and these effects are independent of the AHR pathway.

Sign in / Sign up

Export Citation Format

Share Document