Reevaluation on accumulation and depletion of dioxin-like compounds in eggs of laying hens: Quantification on dietary risk from feed to egg

被引：15

作者：

Wang, Chu ^{[1
,4
]}

Dong, Shujun ^{[2
]}

Wang, Pu ^{[3
]}

Hao, Yanfen ^{[1
]}

Wang, Ruiguo ^{[2
]}

Zhang, Su ^{[2
]}

Wang, Yaxin ^{[2
]}

Fan, Mengdie ^{[2
]}

Zhang, Qinghua ^{[1
,4
,5
]}

Jiang, Guibin ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicot, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

[2] Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Beijing 100081, Peoples R China

[3] Jianghan Univ, Inst Environm & Hlth, Hubei Key Lab Environm & Hlth Effects Persistent, Wuhan 430056, Peoples R China

[4] Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China

[5] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Environm, Hangzhou 310000, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2021年 / 801卷

基金：

中国国家自然科学基金;

关键词：

PCDD/Fs; Dioxin-like PCBs; Half-life; Transfer rate; Estimated dietary intake; DIBENZO-P-DIOXINS; FREE-RANGE HENS; POLYCHLORINATED-BIPHENYLS; WASTE INCINERATORS; PCBS; PCDD/FS; SOIL; BIOACCUMULATION; CONTAMINATION; FURANS;

D O I：

10.1016/j.scitotenv.2021.149690

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Updated assessment on transfer of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) from feed to food is essential for understanding human exposure risk. A controlled feeding experiment was conducted for laying hens to reevaluate the transfer characteristics of dioxin-like compounds from feed to egg. Two fortified diets (1.17 and 5.13 pg TEQ g(-1) dry weight), made by blending with fly ash, were fed to laying hens for 14 days, followed by 28-days depletion. Levels of Sigma TEQ(PCDD/Fs+DL-PCBs) in eggs rapidly increased once exposure started, reaching at 1.98 and 6.86 pg TEQ g(-1) lw at the end of exposure for low and high-exposure groups, respectively, and dropped to under the European legislation (maximum levels: 5.0 pg TEQ g(-1) lw) after 28-days depletion. The quantitative depletions showed that the half-lives (T-1/2) of Sigma TEQ(PCDD/Fs) in eggs were 23 and 14 days for low-and high-exposure groups, respectively. The depletion and accumulation rates of PCDD/Fs were in the range of 0.026-0.151 and 0.005-0.016 day(-1), respectively, representing that the T-1/2 of PCDD/Fs in eggs ranged from 5 to 27 days. The depletion kinetics of DL-PCBs was not significant in egg. The hens with higher laying rates exhibited shorter T-1/2 of PCDD/Fs, implying that increasing laying rate could expedite the depletion of PCDD/Fs in egg. The T-1/2 of PCDD/Fs in egg were negatively correlated with the chlorine number, indicating that lower chlorinated congeners tended to be retained in the egg. Transfer rates of PCDD/Fs were in the range of 4-19%, which were lower than the previous results. These results were attributed to short exposure time and low bioavailability of PCDD/Fs in fly ash. Estimations of dietary intake highlighted the dietary risk of PCDD/Fs from feed to egg, which would pose limited adverse effects on human health. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：8

共 39 条

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