title: Levels of short chain chlorinated paraffins in pine needles and bark  and their vegetation-air partitioning in urban areas.
abstract: Short chain chlorinated paraffins (SCCPs) have been of considerable concern in recent years due to their high production volumes, environmental persistency and potential for long range atmospheric transport. Vegetation can take up considerable amounts of semivolatile organic compounds from the atmosphere and can act as indicators of local contamination. Paired pine needles and bark were sampled around Beijing during winter and summertime to investigate the distribution of SCCPs in urban areas. Levels in bark samples ranged 5.79-37.5 μg/g on a lipid normalized basis (lw) with a geometric mean (GM) of 16.9 μg/g lw whereas levels were 3.03-40.8 (GM 11.8) μ/g lw for needles. Average congener group abundance profiles showed equal contribution of all four carbon groups (C(10-13)) in wintertime where as higher abundances of C(10) and C(11) groups were found during summer. Uptake of SCCPs occurred mainly via kinetically limited gaseous deposition and particle bound deposition in the investigated area.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors.forename: Thanh
authors.initials: T
authors.lastname: Wang
authors.forename: Junchao
authors.initials: J
authors.lastname: Yu
authors.forename: Shanlong
authors.initials: S
authors.lastname: Han
authors.forename: Yawei
authors.initials: Y
authors.lastname: Wang
authors.forename: Guibin
authors.initials: G
authors.lastname: Jiang
mesh_terms: D000388:Air; D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere / Q000737:chemistry; D002244:Carbon; D002947:Cities; D004784:Environmental Monitoring; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D010232:Paraffin / Q000032:analysis*; D024301:Plant Bark / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D012621:Seasons
chemical_list: D000393:Air Pollutants; D006843:Hydrocarbons, Chlorinated; D002244:Carbon; D010232:Paraffin