Polychlorinated dibenzo-p-dioxins and dibenzofurans in lotus from a lake historically polluted by the chlor-alkali industry: Occurrence, organ distribution and health risk from dietary intake
Polychlorinated dibenzo-p-dioxins and dibenzofurans in lotus from a lake historically polluted by the chlor-alkali industry: Occurrence, organ distribution and health risk from dietary intake
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DOI：
10.1016/j.envpol.2021.118395
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发表时间：
2021-10-23
影响因子：
8.9
通讯作者：
Wang, Pu
中科院分区：
文献类型：
--
作者：
Du, Rui;Luo, Xi;Wang, Pu
本研究以湖北鸭儿湖荷花为研究对象，研究了荷花中多氯二苯并二恶英和二苯并呋喃（PCDD/Fs）的器官分布特征和膳食摄入的暴露风险。多氯二苯并对二恶英/多氯二苯并呋喃的最高浓度出现在主莲藕和纤维莲藕中，平均值分别为48.9 +/- 90.1皮克/克和94.6 +/- 143皮克/克。在所有调查样本中，八氯二苯并对二恶英（OCDD）和八氯二苯并呋喃（OCDF）是主要的同系物，分别占Sigma（17）PCDD/Fs的26%和17%，其次是1，2，3，4，6，7，8-HpCDF（9%）。结果表明，莲心、莲膜、莲叶等可食器官中的PCDD/Fs含量较高。计算了食用莲器官中的WHO毒性当量和居民对莲制品的可能日摄入量（PDI）：莲果实部分的毒性当量平均值为2 pg WHO毒性当量（2005）/g dw，雅尔湖周边青少年对莲制品的平均周摄入量为2.3 pg WHO毒性当量/kg bw/周。这些结果表明，长期食用鸭儿湖荷花产品对居民的健康构成了危害。
In this study, the organ distribution and exposure risk from dietary intake of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were investigated for lotus collected from Ya-er Lake, a lake in Hubei Province, Central China that was historically polluted by the chlor-alkali industry. The highest concentrations of PCDD/Fs were found in the main and fibrous lotus roots, with mean values of 48.9 +/- 90.1 pg/g and 94.6 +/- 143 pg/g, respectively. In all the investigated samples, Octa-CDD (OCDD) and Octa-CDF (OCDF) were the predominant congeners, at 26% and 17% of Sigma(17) PCDD/Fs, respectively, followed by 1,2,3,4,6,7,8-HpCDF (9%). The distribution ratios of PCDD/Fs in adjacent lotus organs indicated that PCDD/Fs accumulated easily in edible organs, such as lotus seeds, membrane and leaves. The WHO-TEQ in the edible lotus organs and the probable daily intake (PDI) of lotus products by residents were calculated: the toxic equivalents in the lotus fruit parts reached a mean of 2 pg WHO-TEQ(2005)/g dw, and the mean weekly intake of lotus products for adolescents living around Ya-er Lake was 2.3 pg WHO-TEQ/kg bw/week. These results suggested that long-term consumption of lotus products from Ya-er Lake presents a health hazard to residents.