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Vertical distribution and environmental significance of sulfur and oxygen heterocyclic aromatic hydrocarbons in soil samples collected from Beijing, China
Authors:Zhihuan Zhang  Fengpeng He  Qingwei Bu  Song Lu
Institution:Key Laboratory for Hydrocarbon Accumulation, China University of Petroleum, Beijing 102249, China. zhangzh3996@vip.163.com
Abstract:Vertical distribution of the concentration and composition of some sulfur and oxygen heterocyclic aromatic hydrocarbons (SOHAHs), such as, fluorene, dibenzofuran, dibenzothiophene and their alkyl homologues in 10 soil profiles in Beijing have been investigated. The results showed that the concentrations and composition of SOHAHs in topsoil (0-30cm) from different profiles are different. The concentrations of SOHAHs in topsoils are much higher than that in bottom soils where the concentrations are relatively constant. The fingerprints of SOHAHs from same profile are similar in topsoil samples, which are obviously different at the deep part, which suggested that the sources of these compounds are consistent in topsoil and are discriminating between surface and bottom soils. The main sources of SOHAHs in surface soil were fossil fuel combustion, petroleum and wastewater irrigation, while those at deep part were likely derived from the degradation products of soil organic matters.
Keywords:Beijing  Soil profile  Sulfur and oxygen heterocyclic aromatic hydrocarbons (SOHAHs)  Vertical distribution
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