title: Bioaccumulation and translocation of polyhalogenated compounds in rice (Oryza sativa L.) planted in paddy soil collected from an electronic waste recycling site, South China.
abstract: The bioaccumulation and translocation of polyhalogenated compounds (PHCs) in rice planted in the paddy soils of an electronic waste (e-waste) recycling site were investigated, along with the effect of contaminated soils on rice growth. The PHCs included polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), decabromodiphenyl ethane (DBDPE), 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE), and dechlorane plus (DPs). The morphological development and all measured physiological parameters of rice plants except for peroxidase were significantly inhibited by e-waste contaminated soils. Specifically, soil-root bioaccumulation factors (RCFs) increased with increasing logarithm of octanol-water partition coefficient (logKow) for PCBs, but decreased for PBDEs. During translocation from root to stem, translocation factors (TFs) and logKow were positively correlated. However, the accumulation mechanism in the leaf was concentration-dependent. In the high concentration exposure group, translocation play more important role in determination PHCs burden in leaf than atmospheric uptake, with logTF (from stem to leaf) being positively correlated with logKow. In contrast, in the low exposure and control groups, logTF (from stem to leaf) was negatively correlated with logKow. In addition, Syn-DP was selectively accumulated in plant tissues. In conclusion, this study demonstrates that e-waste contaminated soils affect rice growth, revealed the rule of the bioaccumulation and translocation of PHCs in rice plants.
authors.affiliation: School of Life Sciences, South China Normal University, Guangzhou 510631, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Electronic address: luoxiaoj@gig.ac.cn.
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Luo
authors.affiliation: Hainan Research Academy of Environmental Sciences, Haikou 570100, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Mo
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Jiang-Ping
authors.initials: JP
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Bi-Xian
authors.initials: BX
authors.lastname: Mai
authors.affiliation: School of Life Sciences, South China Normal University, Guangzhou 510631, China; Huizhou University, Huizhou 516007, China. Electronic address: pengyh@hzu.edu.cn.
authors.forename: Yong-Hong
authors.initials: YH
authors.lastname: Peng
mesh_terms: D001692:Biological Transport; D002681:China; D059029:Electronic Waste; D006846:Hydrocarbons, Halogenated / Q000378:metabolism*; D012275:Oryza / Q000254:growth & development / Q000378:metabolism*; D059027:Recycling; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D006846:Hydrocarbons, Halogenated; D012987:Soil; D012989:Soil Pollutants
keywords: Bioaccumulation; Electronic waste; Polyhalogenated compounds; Rice; Translocation