title: Plant selective uptake of halogenated flame retardants at an e-waste recycling site in southern China.
abstract: The concentrations and homolog patterns of halogenated flame retardants (HFRs) in vegetables grown at an e-waste contaminated site were investigated. Polybrominated diphenyl ethers (PBDEs) were the dominant HFRs in vegetable tissues, with concentrations ranging from 10.3 to 164 ng g(-1) and 1.16-107 ng g(-1) in shoots and roots, respectively, followed by novel brominated flame retardants (NBFRs) and dechlorane plus (DPs). This is an indication that PBDE contamination in vegetables grown around e-waste recycling sites may pose a risk to the local terrestrial ecosystem and residents. In addition, this is the first report on the concentrations and compositions of NBFRs in vegetables around e-waste recycling sites. The HFRs concentrations in vegetables varied greatly with the vegetable species, with the highest concentrations observed in Brassica oleracea var. capitata. Root concentration factors (RCF) decreased with increasing log Kow of HFRs, which indicated that the uptake of HFRs was controlled mainly by log Kow. Dissimilar HFRs profiles in shoots and roots suggested that the uptake and translocation of HFRs by plants were selective, with lower halogenated congeners prone to accumulation in vegetable tissues. Positive relationships between PBDEs and their substitutes were observed in vegetable tissues, suggesting that the replacement of PBDEs by NBFRs has not resulted in an obvious transition in plants within the study area.
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Graduate University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Shaorui
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Electronic address: clluo@gig.ac.cn.
authors.forename: Chunling
authors.initials: C
authors.lastname: Luo
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.affiliation: College of Environment and Energy, South China University of Technology, Guangzhou, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Yin
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Gan
authors.initials: G
authors.lastname: Zhang
mesh_terms: D000383:Agriculture; D002681:China; D018556:Crops, Agricultural / Q000254:growth & development / Q000378:metabolism*; D059029:Electronic Waste; D005411:Flame Retardants / Q000378:metabolism*; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D054879:Halogenation; D006219:Halogens / Q000378:metabolism*; D006843:Hydrocarbons, Chlorinated / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D018520:Plant Shoots / Q000378:metabolism; D011083:Polycyclic Compounds / Q000378:metabolism; D059027:Recycling; D012989:Soil Pollutants / Q000378:metabolism*; D014675:Vegetables / Q000378:metabolism
chemical_list: D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D006219:Halogens; D006843:Hydrocarbons, Chlorinated; D011083:Polycyclic Compounds; D012989:Soil Pollutants; C526360:dechlorane plus
keywords: DPs; E-waste; NBFRs; PBDEs; Plant uptake; Vegetable