title: Field and modeling study of PBDEs uptake by three tree species.
abstract: A quantitative model was developed to predict the contributions of various pathways of taking up polybrominated diphenyl ethers (PBDEs) into leaves of three evergreen tree species, including soil-root-leaf pathway, soil-air-leaf pathway, and gaseous deposition. The contributions of soil-root-leaf pathway were negligible for PBDE accumulation in leaves. Soil-air-leaf pathway accounted for 16.3% and 3.8% of the total BDE-28 and BDE-47 levels in leaves, respectively; but for the PBDE congeners with log KAW≤-4 and log KOA>11, this pathway was ignorable. The contributions of gaseous deposition varied widely, accounting for 10%-50% for BDE-28, 100, 153, 154, and 183, 34%-96% for BDE-47, and <5% for BDE-209 of the measured concentrations in leaves of the three tree species. Therefore, direct atmosphere deposition without the influence of soil volatilization was a significant pathway for foliar uptake of BDE-47, 99, 100, 153, 154, and 183 on a background of low contaminated soil. For BDE-209, atmospheric particulate deposition dominates its foliar uptake.
authors.affiliation: Shenzhen Key Laboratory of Circular Economy, Shenzhen Graduate School, Peking University, Shenzhen 518055, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Ding
authors.affiliation: Shenzhen Key Laboratory of Circular Economy, Shenzhen Graduate School, Peking University, Shenzhen 518055, China.
authors.forename: Wen-Jing
authors.initials: WJ
authors.lastname: Chang
authors.affiliation: Shenzhen Key Laboratory of Circular Economy, Shenzhen Graduate School, Peking University, Shenzhen 518055, China; Department of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zeng
authors.affiliation: Shenzhen Key Laboratory of Circular Economy, Shenzhen Graduate School, Peking University, Shenzhen 518055, China. Electronic address: nihg@pkusz.edu.cn.
authors.forename: Hong-Gang
authors.initials: HG
authors.lastname: Ni
mesh_terms: D004784:Environmental Monitoring; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D008956:Models, Chemical; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000378:metabolism*; D014197:Trees / Q000378:metabolism*
chemical_list: D055768:Halogenated Diphenyl Ethers; D012987:Soil; D012989:Soil Pollutants
keywords: Modeling; Polybrominated diphenyl ethers (PBDEs); Soil–air–leaf pathway; Tree; Uptake