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Title: Observations of atmospheric monoaromatic hydrocarbons at urban, semi-urban and forest environments in the Amazon region
Authors: Paralovo, Sarah L.
Borillo, Guilherme C.
Barbosa, Cybelli G.G.
Godoi, Ana Flávia Locateli
Yamamoto, Carlos Itsuo
Souza, Rodrigo Augusto Ferreira de
Andreoli, Rita Valéria
Costa, Patrícia S.
Almeida, Gerson Paiva
Manzi, Antônio Ocimar
Pöhlker, Christopher
Yáñez-Serrano, Ana Maria
Kesselmeier, Jürgen
Godoi, Ricardo Henrique Moreton
Keywords: Benzene
Health Risks
Interface States
Risk Analysis
Risk Assessment
Volatile Organic Compounds
Amazon Forests
Green Oceans
Tall Towers
Urban Growth
Meta Xylene
Ortho Xylene
Para Xylene
Aromatic Hydrocarbon
Atmospheric Pollution
Concentration (composition)
Experimental Study
Health Risk
Urban Atmosphere
Air Pollutant
Air Pollution
Chronic Disease
Health Hazard
Limit Of Detection
Malignant Neoplastic Disease
Priority Journal
Risk Assessment
Urban Area
Amazon Basin
Issue Date: 2016
metadata.dc.publisher.journal: Atmospheric Environment
metadata.dc.relation.ispartof: Volume 128, Pags. 175-184
Abstract: The Amazon region is one of the most significant natural ecosystems on the planet. Of special interest as a major study area is the interface between the forest and Manaus city, a state capital in Brazil embedded in the heart of the Amazon forest. In view of the interactions between natural and anthropogenic processes, an integrated experiment was conducted measuring the concentrations of the volatile organic compounds (VOCs) benzene, toluene, ethylbenzene and meta, ortho, para-xylene (known as BTEX), all of them regarded as pollutants with harmful effects on human health and vegetation and acting also as important precursors of tropospheric ozone. Furthermore, these compounds also take part in the formation of secondary organic aerosols, which can influence the pattern of cloud formation, and thus the regional water cycle and climate. The samples were collected in 2012/2013 at three different sites: (i) The Amazon Tall Tower Observatory (ATTO), a pristine rain forest region in the central Amazon Basin; (ii) Manacapuru, a semi-urban site located southwest and downwind of Manaus as a preview of the Green Ocean Amazon Experiment (GoAmazon 2014/15); and (iii) the city of Manaus (distributed over three sites). Results indicate that there is an increase in pollutant concentrations with increasing proximity to urban areas. For instance, the benzene concentration ranges were 0.237-19.6 (Manaus), 0.036-0.948 (Manacapuru) and 0.018-0.313 μg m-3 (ATTO). Toluene ranges were 0.700-832 (Manaus), 0.091-2.75 μg m-3 (Manacapuru) and 0.011-4.93 (ATTO). For ethylbenzene, they were 0.165-447 (Manaus), 0.018-1.20 μg m-3 (Manacapuru) and 0.047-0.401 (ATTO). Some indication was found for toluene to be released from the forest. No significant difference was found between the BTEX levels measured in the dry season and the wet seasons. Furthermore, it was observed that, in general, the city of Manaus seems to be less impacted by these pollutants than other cities in Brazil and in other countries, near the coastline or on the continent. A risk analysis for the health of Manaus' population was performed and indicated that the measured concentrations posed a risk for development of chronic diseases and cancer for the population of Manaus. © 2015 Elsevier Ltd.
metadata.dc.identifier.doi: 10.1016/j.atmosenv.2015.12.053
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