Journal
ENVIRONMENTAL POLLUTION
Volume 285, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2021.117253
Keywords
PCBs; Colostrum; Exposure; Health risks; Enantiomer characteristics
Categories
Funding
- National Natural Science Foundation of China [21427815, 21777137]
- Creative Research Group Fund [21621005]
- Zhejiang Shuren University Basic Scientific Research Special Funds [2021XZ017]
- Zhejiang Provincial Natural Science Foundation [LQ20B070006]
- Hang-zhou Normal University Research Start-up Funds [2019QDL005]
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The study revealed recent exposure of mothers from Mianyang to PCBs and potential health risks for infants through breastfeeding.
Polychlorinated biphenyls (PCBs) may transfer into the neonates through the placental transfer and via breastfeeding after the delivery, thus might be harmful to the infant. Sixty colostrum samples in the Yangtze River Region were collected to investigate the concentration, distribution pattern, and enantiomer characteristic of the PCB exposure. Among all samples, over 90% of pollutants were tetra-to hepta-chlorinated PCBs. The sum concentration of the PCB was 512 (IQR: 322-856) ng g(-1) lipid weight. Enantiomer fraction (EF) of PCB 95 and PCB 149 was found lower than the racemic value, while EFs of PCB 45 and PCB 136 were found higher and nearracemic state, respectively. The concentration pattern and enantiomeric properties of the PCBs indicated that the mothers from Mianyang had a recent exposure to PCBs. Among all samples, similar exposure and metabolic pathways of the PCB congeners were observed. PCB exposure showed no significant correlation with the birth outcome of the infants, but 43.3% of the infants have potential health risks via breastfeeding.
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