Occurrence and bioaccumulation of polybrominated diphenyl ethers in sediments and paddy ecosystems of Liaohe River Basin, northeast China

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• 作者：Xindong Ma¹ ; ² ; Haijun Zhang² ; ^{hjzhang@dicp.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Wenjun Yao¹ ; ³ ; Wen Guo¹ ; ³ ; Depeng Li¹ ; Ziwei Yao¹ ; Jiping Chen² ; ^{chenjp@dicp.ac.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Polybrominated diphenyl ethers ; Bioaccumulation ; Sediment ; Paddy field ; Liaohe River Basin
• 刊名：Journal of Environmental Sciences
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：43
• 期：Complete
• 页码：250-256
• 全文大小：599 K

文摘

Concentrations of 16 polybrominated diphenyl ether (PBDE) congeners were measured in river sediments, paddy soils and three species of paddy-field organisms (crab, loach and carp) collected from the Liaohe River Basin, northeastern China. The total contents of PBDEs (∑₁₆PBDEs) in sediments and paddy soils were in the ranges of 273.4–3246.3 pg/g dry weight (dw), and 192.1–1783.8 pg/g dw, respectively. BDE 209 was the dominant congener both in sediments and paddy soils. The concentrations of ∑₁₆PBDEs in sediments were significantly higher than those in the adjacent paddy soils, indicating a potential transport of PBDEs from river to paddy ecosystems via river water irrigation. The biota–soil accumulation factor (BSAF) was calculated as the ratio between the lipid-normalized concentration in paddy-field organisms and the total organic carbon-normalized concentration in paddy soil. The average BSAF values of ∑₁₅PBDEs followed the sequence of crab (3.6) > loach (3.3) > carp (2.1). BDE 154 had the highest BSAF value, and a parabolic trend between BSAF values of individual PBDE congeners and their logK_OW values was observed. In view of the fact that crab had the larger BSAF value and higher lipid content, the ecological risk and health risk for crab cultivation in paddy fields should be of particular concern.