The use of toxic equivalency factors in assessing occupational and environmental health risk associated with exposure to airborne mixtures of polycyclic aromatic hydrocarbons (PAHs)

Chemosphere ◽  
1996 ◽  
Vol 32 (4) ◽  
pp. 639-648 ◽  
Author(s):  
Thomas Petry ◽  
Peter Schmid ◽  
Christian Schlatter
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Health Risk ◽  
Environmental Health ◽  
Aromatic Hydrocarbons ◽  
Equivalency Factors ◽  
Environmental Health Risk ◽  
Polycyclic Aromatic ◽  
Toxic Equivalency Factors

Surface water polycyclic aromatic hydrocarbons (PAH) in urban areas of Nanjing, China

2017 ◽  
Vol 76 (8) ◽  
pp. 2150-2157 ◽  
Author(s):  
Chunhui Wang ◽  
Shenglu Zhou ◽  
Shaohua Wu ◽  
Jing Song ◽  
Yaxing Shi ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Surface Water ◽  
Aromatic Hydrocarbons ◽  
Urban Areas ◽  
Coke Oven ◽  
Environmental Risks ◽  
Equivalency Factors ◽  
Polycyclic Aromatic ◽  
Toxic Equivalency Factors ◽  
Oil Source

The concentration, sources and environmental risks of polycyclic aromatic hydrocarbons (PAHs) in surface water in urban areas of Nanjing were investigated. The range of ∑16PAHs concentration is between 4,076 and 29,455 ng/L, with a mean of 17,212 ng/L. The composition of PAHs indicated that 2- and 3-ring PAHs have the highest proportion in all PAHs, while the 5- and 6-ring PAHs were the least in proportion. By diagnostic ratio analysis, combustion and petroleum were a mixture input that contributed to the water PAH in urban areas of Nanjing. Positive matrix factorization quantitatively identified four factors, including coke oven, coal combustion, oil source, and vehicle emission, as the main sources. Toxic equivalency factors of BaP (BaPeq) evaluate the environmental risks of PAHs and indicate the PAH concentration in surface water in urban areas of Nanjing had been polluted and might cause potential environmental risks. Therefore, the PAH contamination in surface water in urban areas of Nanjing should draw considerable attention.

scholarly journals Occurrence and risk characterization of polycyclic aromatic hydrocarbons of edible oils by the Margin of Exposure (MOE) approach

2019 ◽  
Vol 62 (1) ◽  
Author(s):  
Joon-Goo Lee ◽  
Jung-Hyuck Suh ◽  
Hae-Jung Yoon
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Edible Oils ◽  
Heat Processing ◽  
Daily Consumption ◽  
Equivalency Factors ◽  
Polycyclic Aromatic ◽  
Toxic Equivalency Factors ◽  
Margin Of Exposure ◽  
Genotoxic Chemicals

Abstract Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic and genotoxic chemicals naturally derived from food during heat processing. Edible oil is one of the most frequently contaminated foods. Many researches were recently conducted to determine the contents of PAHs and to assess their risks, but there have been no studies characterising risks of PAHs by calculating Margin of Exposure (MOE) of total PAHs instead of toxic equivalency factors (TEFs) concept in Korea. To analyze the 4 PAHs including benz(a)anthracene (BaA), chrysene (CHR), benzo(b)fluoranthene (BbF), and benzo(a)pyrene (BaP) simultaneously, gas chromatography with mass spectrometry was optimized. Total 303 edible oils were investigated and contaminated by 4 PAHs at ND–12.91 ng g−1. The MOEs were estimated by PAHs contents, daily consumption, and were over 10,000. The risk of PAHs of edible oils in Korea was of low concern. Furthermore, the MOEs of the estimated equivalent BaP calculated by TEFs of other 3 PAHs were higher than those of mixed PAHs, which would be overestimated.

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