Bioconcentration and trophic transfer of polychlorinated biphenyls and polychlorinated dibenzo-p-dioxins and dibenzofurans in aquatic animals from an e-waste dismantling area in East China.
Bioconcentration and trophic transfer of polychlorinated biphenyls and polychlorinated dibenzo-p-dioxins and dibenzofurans in aquatic animals from an e-waste dismantling area in East China.
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DOI：
10.1039/c5em00028a
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Chaofei Zhu;Pu Wang;Yingming Li;Zhaojing Chen;Wenjuan Li;Patrick Ssebugere;Qinghua Zhang;G. Jiang-G.-Ji
中科院分区：
文献类型：
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作者：
Chaofei Zhu;Pu Wang;Yingming Li;Zhaojing Chen;Wenjuan Li;Patrick Ssebugere;Qinghua Zhang;G. Jiang-G.-Ji
从中国东部电子废物拆解区采集了8种水生生物，研究了多氯联苯（PCBs）、多氯二苯并二恶英（PCDD）和多氯二苯并呋喃（PCDF）的生物富集和营养转移。PCBs的平均浓度范围为6.01 × 10（4）~ 2.27 × 10（6）pg/g干重。鳗鱼体内∑ 25 PCB含量显著高于其他物种。多氯二苯并对二恶英/多氯二苯并呋喃的含量从蟾蜍的8.13皮克/克干重变化到石螺的617皮克/克干重。世界卫生组织2005-毒性当量（WHO 2005-TEQs）范围为2.57至2352皮克WHO毒性当量/克干重，几何平均值为64.7皮克WHO毒性当量/克干重，大大超过了欧洲联盟委员会规定的4皮克/克干重的最高水平。25种多氯联苯同系物的对数转移生物富集系数（BCF）在1.0 ~ 6.6之间，其中CB-205在鲫鱼体内的BCF值最高，CB-11在青蛙体内的BCF值最低。在log BCF和log Kow之间观察到抛物线相关性（R（2）= 0.53，p < 0.001），最大值出现在log Kow约为7时。在生物浓缩系数对数与多氯联苯氯原子数的关系图中也发现了类似的相关性（R（2）= 0.57，p < 0.001），表明多氯联苯的中卤同系物更容易被水生生物物种积累。水生物种的对数转移浓度和营养级之间没有显著的相关性，这表明在本研究中没有观察到PCBs和PCDD/Fs的营养放大。
Eight aquatic biota species were collected from an e-waste dismantling area in East China to investigate bioconcentration and trophic transfer of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). The mean concentrations of PCBs varied widely from 6.01 × 10(4) to 2.27 × 10(6) pg per g dry weight (dw). The ∑25PCB concentrations in eels were significantly higher than those in other species. The levels of PCDD/Fs changed from 8.13 pg per g dw in toads to 617 pg per g dw in stone snails. World Health Organization-toxic equivalents (WHO2005-TEQs) ranged from 2.57 to 2352 pg WHO-TEQ per g dw with a geometric mean value of 64.7 pg WHO-TEQ per g dw, which greatly exceeded the maximum levels of 4 pg per g ww set by the European Commission. The log-transferred bioconcentration factors (BCFs) of 25 PCB congeners ranged from 1.0 to 6.6, with the highest value for CB-205 in crucian carp and the lowest value for CB-11 in frog. A parabolic correlation was observed between log BCF and log Kow (R(2) = 0.53, p < 0.001), where the maximum value occurred at a log Kow of approximately 7. A similar correlation was also found in the plot of log BCF against the number of chlorine atoms of PCBs (R(2) = 0.57, p < 0.001), indicating that medium-halogenated congeners of PCBs are more easily accumulated by aquatic biota species. There were no significant correlations between the log-transferred concentrations and trophic levels of aquatic species, suggesting that trophic magnification for PCBs and PCDD/Fs was not observed in this study.