title: PAHs uptake and translocation in Cinnamomum camphora leaves from Shanghai, China.
abstract: Foliage uptake and inner-leaf translocation of polycyclic aromatic hydrocarbons (PAHs) by Cinnamomum camphora from different urbanized areas were comparatively investigated in this study. Spatial and seasonal variations of ∑16PAHs in leaves were observed, likely due to the diversity of leaf wax contents sampled in different seasons and locations. A negative correlation between the wax contents and ∑16PAHs concentrations in the cuticular wax was observed. The low values of TFf-m(translocation factor from foliar dust to mesophyll) indicated a poor translocation ability of PAHs from the foliar dust to the mesophyll. However, the transportation of PAHs from the foliar dust to the cuticular wax was the primary pathway of leaf accumulation, and TFf-w(translocation factor from foliar dust to cuticular wax) values showed an increasing tendency of low molecular weight (LMW) PAHs and a decreasing tendency of high molecular weight (HMW) PAHs. This result indicated a rapid diffusion of gas-phase PAHs with LMW and a slow desorption of the particle-bound PAHs with HMW in the foliar dust. The concentrations of PAHs pollutants followed an obvious order of Rural area>Suburb area>Urban area in winter, and the higher contaminated locations were associated with some pollution sources nearby. Furthermore, the results of principal component analysis with multiple linear regression analysis analysis indicated that PAHs in leaves derived mainly from vehicle emissions. Overall, the accumulation and transformation of PAHs in leaves suggests the extensive amount of atmospheric pollutant release in high urbanization area.
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Yang
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
authors.forename: Sai
authors.initials: S
authors.lastname: Liu
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
authors.forename: Xianbiao
authors.initials: X
authors.lastname: Lin
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China. Electronic address: mliu@geo.ecnu.edu.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.affiliation: Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
authors.forename: Xinran
authors.initials: X
authors.lastname: Liu
mesh_terms: D000393:Air Pollutants / Q000378:metabolism*; D002681:China; D027423:Cinnamomum camphora / Q000378:metabolism*; D004784:Environmental Monitoring; D018515:Plant Leaves / Q000378:metabolism*; D011084:Polycyclic Aromatic Hydrocarbons / Q000378:metabolism*; D012621:Seasons; D001335:Vehicle Emissions
chemical_list: D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons; D001335:Vehicle Emissions
keywords: Foliage uptake; PAHs; Source apportionment; Transformation mechanism; Translocation factor