scholarly journals Hidrocarburos Aromáticos Policíclicos (HAPs) en ambientes marinos: Una revisión de América

2020 ◽  
Vol 1 (2) ◽  
pp. 19-40
Author(s):  
T. Recabarren-Villalón ◽  
M.M. Orazi ◽  
J.E. Marcovecchio ◽  
A.H. Arias
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Environmental Concern ◽  
Original Research ◽  
Marine Environments ◽  
Multiple Sources ◽  
Coastal Marine ◽  
Polycyclic Aromatic ◽  
Global Concern ◽  
Monitoring Activity

The polycyclic aromatic hydrocarbons (PAHs) are ubiquitous organic compounds of global concern. They pres-ent mutagenic and carcinogenic characteristics, in addition to a wide variety of other adverse effects in the or-ganisms. They are widely distributed in marine environments, implying several health risks for both ecosystems and public health. Therefore, require constant monitoring and tailoring of preventive measures for their control. This review is based on the PAHs original research within coastal-marine environments published along the past ten years in America, considering the main environmental matrix such as sediment, water, organisms, and air. The review shows an outstanding PAHs monitoring activity led by USA and Mexico –at all matrix-, followed by Argentina, Brazil and Chile which demonstrate a rising environmental concern on these compounds, focused in highly anthropized areas. The present data for South America is still scarce, including many areas with null information. This review demonstrates that along all the continent and all matrixes, detectable concentrations of PAHs from multiple sources are reported, with levels ranging from minimum to extremely high. Keywords: Polycyclic aromatic hydrocarbons (PAHs), marine environments, America.

Distributions and multiple sources of chlorinated polycyclic aromatic hydrocarbons in the air over Japan

2019 ◽  
Vol 649 ◽  
pp. 364-371 ◽  
Author(s):  
Takeshi Ohura ◽  
Takeshi Suhara ◽  
Yuta Kamiya ◽  
Fumikazu Ikemori ◽  
Shiho Kageyama ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Multiple Sources ◽  
Polycyclic Aromatic

scholarly journals Formation Mechanism of Benzo(a)pyrene: One of the Most Carcinogenic Polycyclic Aromatic Hydrocarbons (PAH)

Molecules ◽  
2019 ◽  
Vol 24 (6) ◽  
pp. 1040 ◽  
Author(s):  
Edina Reizer ◽  
Imre Csizmadia ◽  
Árpád Palotás ◽  
Béla Viskolcz ◽  
Béla Fiser
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Growth Mechanism ◽  
Aromatic Hydrocarbons ◽  
Energy Levels ◽  
Chemical Species ◽  
Polycyclic Aromatic ◽  
Global Concern ◽  
The Difference ◽  
Intramolecular Hydrogen ◽  
Deep Exploration

The formation of polycyclic aromatic hydrocarbons (PAHs) is a strong global concern due to their harmful effects. To help the reduction of their emissions, a crucial understanding of their formation and a deep exploration of their growth mechanism is required. In the present work, the formation of benzo(a)pyrene was investigated computationally employing chrysene and benz(a)anthracene as starting materials. It was assumed a type of methyl addition/cyclization (MAC) was the valid growth mechanism in this case. Consequently, the reactions implied addition reactions, ring closures, hydrogen abstractions and intramolecular hydrogen shifts. These steps of the mechanism were computed to explore benzo(a)pyene formation. The corresponding energies of the chemical species were determined via hybrid density funcional theory (DFT), B3LYP/6-31+G(d,p) and M06-2X/6-311++G(d,p). Results showed that the two reaction routes had very similar trends energetically, the difference between the energy levels of the corresponding molecules was just 6.13 kJ/mol on average. The most stable structure was obtained in the benzo(a)anthracene pathway.

scholarly journals Exposure to multiple sources of polycyclic aromatic hydrocarbons and breast cancer incidence

2016 ◽  
Vol 89-90 ◽  
pp. 185-192 ◽  
Author(s):  
Alexandra J. White ◽  
Patrick T. Bradshaw ◽  
Amy H. Herring ◽  
Susan L. Teitelbaum ◽  
Jan Beyea ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Cancer Incidence ◽  
Aromatic Hydrocarbons ◽  
Breast Cancer Incidence ◽  
Multiple Sources ◽  
Polycyclic Aromatic
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