Robinsonecio gerberifolius as a sentinel organism for atmospheric pollution by heavy metals in several sites of Mexico city and its metropolitan area

2021 ◽  
Author(s):  
Mariana Martínez-Pérez ◽  
Francisco Arenas-Huertero ◽  
Josefina Cortés-Eslava ◽  
Ofelia Morton-Bermea ◽  
Sandra Gómez-Arroyo
Keyword(s):  
Heavy Metals ◽  
Mexico City ◽  
Metropolitan Area ◽  
Atmospheric Pollution

Indicators of environmental contamination by heavy metals in leaves of Taraxacum officinale in two zones of the metropolitan area of Mexico City

2017 ◽  
Vol 25 (5) ◽  
pp. 4739-4749 ◽  
Author(s):  
Sandra Gómez-Arroyo ◽  
Arisbel Barba-García ◽  
Francisco Arenas-Huertero ◽  
Josefina Cortés-Eslava ◽  
Michel Grutter de la Mora ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Mexico City ◽  
Metropolitan Area ◽  
Environmental Contamination ◽  
Taraxacum Officinale

Heavy metals biomonitoring in the Mexico City metropolitan area

1993 ◽  
Author(s):  
M. Carmen Gonzalez ◽  
M. A. Tenorio
Keyword(s):  
Heavy Metals ◽  
Mexico City ◽  
Metropolitan Area

scholarly journals A Health Risk Assessment of Lead and Other Metals in Pharmaceutical Herbal Products and Dietary Supplements Containing Ginkgo biloba in the Mexico City Metropolitan Area

2021 ◽  
Vol 18 (16) ◽  
pp. 8285
Author(s):  
Patricia Rojas ◽  
Elizabeth Ruiz-Sánchez ◽  
Camilo Ríos ◽  
Ángel Ruiz-Chow ◽  
Aldo A. Reséndiz-Albor
Keyword(s):  
Health Risk ◽  
Dietary Supplements ◽  
Mexico City ◽  
Metropolitan Area ◽  
Ginkgo Biloba ◽  
Graphite Furnace ◽  
Human Health Risk ◽  
Daily Intake ◽  
Herbal Remedies ◽  
Herbal Products

The use of the medicinal plant Ginkgo biloba has increased worldwide. However, G. biloba is capable of assimilating both essential and toxic metals, and the ingestion of contaminated products can cause damage to health. The aim of this study was to investigate the safety of manganese (Mn), copper (Cu), lead (Pb), arsenic (As), and cadmium (Cd) in 26 items containing Ginkgo biloba (pharmaceutical herbal products, dietary supplements, and traditional herbal remedies) purchased in the metropolitan area of Mexico City. Metal analysis was performed using a graphite furnace atomic absorption spectrometer. All of the products were contaminated with Pb, 54% of them with As, and 81% with Cd. The lowest values of Pb, As, and Cd were detected in pharmaceutical herbal products > dietary supplements > traditional herbal remedies. The daily intake dose (DID) of pharmaceutical herbal products was within the established limits for the five metals. Dietary supplements and traditional herbal remedies exceeded the DID limits for Pb. The hazard quotients estimation and non-carcinogenic cumulative hazard estimation index for Mn, As, and Cd indicated no human health risk. Our results suggest that products containing G. biloba for sale in Mexico are not a health risk.

Fuel-based motor vehicle emission inventory for the metropolitan area of Mexico city

2005 ◽  
Vol 39 (5) ◽  
pp. 931-940 ◽  
Author(s):  
I. Schifter ◽  
L. Díaz ◽  
V. Múgica ◽  
E. López-Salinas
Keyword(s):  
Mexico City ◽  
Metropolitan Area ◽  
Emission Inventory ◽  
Motor Vehicle ◽  
Vehicle Emission

Impact of sulfur-in-gasoline on motor vehicle emissions in the metropolitan area of Mexico City☆

Fuel ◽  
2003 ◽  
Vol 82 (13) ◽  
pp. 1605-1612 ◽  
Author(s):  
I Schifter ◽  
L Dı́az ◽  
M Vera ◽  
E Guzmán ◽  
E López-Salinas
Keyword(s):  
Mexico City ◽  
Metropolitan Area ◽  
Vehicle Emissions ◽  
Motor Vehicle ◽  
Motor Vehicle Emissions

Atmospheric Pollution: Experience from Mexico City and Santiago de Chile

2019 ◽  
pp. 127-138
Author(s):  
Luisa T. Molina ◽  
Wenfang Lei ◽  
Miguel Zavala ◽  
Victor Almanza ◽  
Agustin Garcia ◽  
...  
Keyword(s):  
Mexico City ◽  
Atmospheric Pollution ◽  
Santiago De Chile

scholarly journals In situ measurements of speciated atmospheric mercury and the identification of source regions in the Mexico City Metropolitan Area

2009 ◽  
Vol 9 (1) ◽  
pp. 207-220 ◽  
Author(s):  
A. P. Rutter ◽  
D. C. Snyder ◽  
E. A. Stone ◽  
J. J. Schauer ◽  
R. Gonzalez-Abraham ◽  
...  
Keyword(s):  
Point Source ◽  
Mexico City ◽  
Metropolitan Area ◽  
Atmospheric Mercury ◽  
Point Sources ◽  
Rural Site ◽  
Urban Site ◽  
Trajectory Data ◽  
Source Regions ◽  
Rural Sites

Abstract. In order to expand the currently limited understanding of atmospheric mercury source-receptor relationships in the Mexico City Metropolitan Area, real time measurements of atmospheric mercury were made at a downtown urban site, and a rural site on the outskirts of Mexico City, during March 2006. Numerous short-lived increases in particulate mercury (PHg) and reactive gaseous mercury (RGM) concentrations were observed at the urban site during the 17 day study, and less frequent increases in gaseous elemental mercury (GEM) concentrations were measured at both the urban and rural sites. The episodic increases observed were attributed to plume impacts from industrial point source emissions in and around Mexico City. Average concentrations and standard deviations measured during the study were as follows: i) urban site; PHg=187±300 pg m−3, RGM=62±64 pg m−3, GEM=7.2±4.8 ng m−3, and; ii) rural site; GEM=5.0±2.8 ng m−3. Several source regions of atmospheric mercury to the urban and rural sites were determined using Concentration Field Analysis, in which atmospheric mercury measurements were combined with back trajectory data to determine source regions. Only some source regions correlated to mercury emission sources listed in the Federal Pollutant Release and Transfer Register, leaving the rest unaccounted for. Contributions of anthropogenic mercury point sources in and around Mexico City to concentration averages measured at the urban site during the study were estimated to be: 93±3% of reactive mercury (PHg and RGM), and; 81±0.4% of GEM. Point source contributions to GEM measured at the rural site were 72±1%. GEM and reactive mercury (PHg+RGM) were not found to correlate with biomass burning at either of the measurement sites.

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