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Scientia Silvae Sinicae ›› 2010, Vol. 46 ›› Issue (6): 161-165.doi: 10.11707/j.1001-7488.20100625

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Diurnal Variation of Concentrations of Polycyclic Aromatic Hydrocarbons (PAHs) in the leaves of Cinnamomum camphora

Luo Yingli1;Yan Wende1,2,3 ;Tian Dalun1,3,4;Liang Xiaocui1,2,3;Peng Gang1   

  1. 1.Central South University of Forestry and Technology Changsha 410004;2.Provincial Key Lab of Urban Forest Ecology in Hunan Changsha 410004;3.National Key Station for Field Scientific Observation & Experiment Huitong 418307;4.National Engineering Lab for Applied Technology of Forestry & Ecology in South China Changsha 410004
  • Received:2009-07-19 Revised:2010-04-06 Online:2010-06-25 Published:2010-06-25

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Abstract:

Polycyclic aromatic hydrocarbons（PAHs）are a kind of persistent toxic organic pollutants which widely exist in environment. In this study, the diurnal variation of PAHs concentrations in leaves of Cinnamomum camphora was analyzed. The result showed that the concentrations of the total PAHs in the leaves in the daytime were much lower than those at night, and the result was well consistent with the diurnal variation of PAHs in the atmosphere deposition. 3-and 4-rings PAHs compounds were main components of the tested 16 PAHs and the concentrations formed around 80% of the total PAHs. However, the low-rings PAHs and high-rings PAHs accounted for respectively only approximate 10.40% and 9.81% of the total PAHs. PHE was a main component of ΣPAHs. The ratio of molecule indicators suggested that the PAHs in the leaves of C. camphora were originated from both petroleum and pyrolytic.

Key words: PAHs, leaves of Cinnamomum camphora, diurnal variation