Polycyclic Aromatic Hydrocarbon Composition and Potential Sources for Sediment Samples from the Beaufort and Barents Seas

Abstract

However, samples from the SE Barents and Novaya Zemlya have received greater amounts of combustion PAHs.

Significance of wet deposition to removal of atmospheric particulate matter and polycyclic aromatic hydrocarbons: A case study in Guangzhou, China

“…Temporally, the concentration levels of TOC and PAHs in wet deposition from the present study were lower than those from previous studies also conducted in Guangzhou, i.e., the level of TOC in 2010 (2.5 mg L À1 ) was lower than those in 2004 (7.1 mg L À1 ) (Xu et al, 2008) and levels of PAHs in 2010 (170 ng L À1 ) were lower than those in 2005 (1910 ng L À1 ). On the other hand, the relative abundance of the low molecular weight (3 þ 4-ring) PAHs, mainly derived from low-efficient combustion of domestic coal and biomass (Liu et al, 2012b), was reduced from 86% in 2005 to 61% in 2010 (Huang et al, 2009 or > 0.5 and in the range of 0.2e0.35 or 0.2e0.5 indicate coal or wood burning and petroleum combustion, respectively (Yunker et al, 1996(Yunker et al, , 2002. In the present study, the mean values of these two indices both decreased from 2005 (0.37 and 0.53) (Huang et al, 2009) to 2010 (0.29 and 0.46), uniformly suggesting similar , and those of straw decreased 69% (68%).…”

Polycyclic aromatic hydrocarbons (PAHs) in continental shelf sediment of China: Implications for anthropogenic influences on coastal marine environment

“…Methylated PAH compounds can originate from low temperature combustion processes (Lake et al, 1979;Mai et al, 2003) and petrogenic residues (Mai et al, 2003;Yunker et al, 1996). Value of MP/P was less than 1 and 2e6 for pyrolytic and petrogenic PAHs, respectively (Mai et al, 2003;Zakaria et al, 2002).…”

Contamination of polycyclic aromatic hydrocarbons (PAHs) in urban soils in Beijing, China

“…In general, parent PAHs are largely produced by incomplete combustion of fossil fuels and plant materials or natural diagenesis (Yunker et al, 1996). To distinguish the natural and anthropogenic PAHs inputs in soils, we used PAHs compositions (parent, alkyl and vascular plant PAHs) and their ratios as a way to discriminate PAHs sources (Yunker et al, 1999;Sanders et al, 2002).…”