Polycyclic aromatic hydrocarbons (PAHs) are a class of chemicals that occur naturally in coal, crude oil, and gasoline. They result from burning coal, oil, gas, wood, garbage, and tobacco. PAHs can bind to or form small particles in the air. High heat when cooking meat and other foods will form PAHs.

 · An analysis of 12 polycyclic aromatic hydrocarbons (PAHs) in PM2.5 (particulate matter with a diameter smaller than 2.5 microns) samples collected at Yucheng, Shandong, in June 2013 was conducted to determine the concentrations, composition, sources, and associated cancer risk. The results revealed that the average PAH concentration was …

 · Atmospheric particulate matter with diameter <2.5 um (PM2.5) was collected at Peking University (PKU) in Beijing, China before, during, and after the 2008 Olympics and analyzed for black carbon (BC), organic carbon (OC), lower molecular weight (MW < 300) and MW302 Polycyclic Aromatic Hydrocarbons (PAHs), nitrated PAHs (NPAHs) and …

 · The present study aimed to investigate the occurrence, spatial pattern and source apportionment of PAHs across Chinese background forest soils (O- & A-horizons). The 143 soils collected from 30...

Abstract. Polycyclic aromatic hydrocarbons (PAHs) are aromatic compounds with two or more fused benzene rings in their structural configurations. PAHs do not contain heteroatoms and substituents on the ring system. PAHs containing up to four rings are called light PAHs while those that contain more than four rings are considered as heavy …

 · PAHs compositional profile is given in Figure S2 and showed three- and four-rings PAHs were the dominant groups with large proportions (>50%) in both O- and A-horizons of forest soils. Such a ...

 · The general characteristics of PAHs are high melting and boiling points (therefore they are solid), low vapor pressure, and very low aqueous solubility .The latter two characteristics tend to decrease with increasing molecular weight, on the contrary, resistance to oxidation and reduction increases .Aqueous solubility of PAHs decreases …

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5 and 6 in the light of new scientific information, including migration of PAHs from the articles referred to therein, and information on alternative raw materials and, if appro­ priate, modify these paragraphs accordingly.' 7.12.2013 Official Journal of the European Union L …

 · 2013127, (EU) No 1272/2013,《、、》REACH17(XVII)（PAH）。20151227。 （PAHs ...

 · 2013126,（EU）No 1272/2013,REACHXVIIPAHs。PAHs 。（EC ）1907/2006XVII,502,5,6,78： …

 · Polycyclic-aromatic hydrocarbons (PAHs) Little Pro on . Polycyclic Aromatic Hydrocarbons (PAHs) are well-known to be hazardous for human health and the environment. Many of them are …

 · PDF | On Dec 1, 2014,,Xiaoli Duan published | Find, read and cite all the research you need on ResearchGate

 · Further, the radius of highest R n decreases with the increased number of PAHs rings, i.e. 50 km for 2-ring PAHs, 40–50 km for 3-ring PAHs, 40 km for 4-ring PAHs, 30–40 km for 5.6-ring PAHs, suggesting that PAHs with higher ring number are more influenced by emissions of shorter distance (McDonough et al., 2014, Yang et al., 2013). For PAHs ...

 · BTEXs、PAHs, ...