[en] Fish are an important source of human dietary exposure to polychlorinated naphthalenes (PCNs). The occurrence and sources of PCNs in different species of freshwater fish are unknown, and few studies have assessed human exposure risks to PCNs through freshwater fish. In this study, 140 freshwater fish samples from 10 species were collected from Beijing markets, China. The Σ75CNs concentration range in the fish was 20.7-1310 pg/g wet weight (ww). The highest median Σ75PCNs concentration (80.4 pg/g ww) was found in mandarin fish (Siniperca chuatsi), and the lowest (29.6 pg/g ww) in snakehead (Channa argus). Di- and tri-CNs were the dominant PCN homologues with contributions of 35.3 % and 30.8 %, respectively. Unintentionally produced PCNs from metal smelting might be the source of PCN contamination in freshwater fish. The cooking temperature and time did not significantly affect the PCN concentrations in fish or the PCN homologue profiles. The highest toxic equivalent (TEQ) value was observed in sturgeon (Acipenser sinensis), followed by mandarin fish. Hexa-CNs were the most abundant homologue for the PCN TEQs. A risk assessment indicated that the dietary exposure risks for local residents to PCNs through freshwater fish were low. However, the relatively high concentrations of PCNs in the samples deserve attention to avoid PCNs exposure risks for groups with high fish consumption rates. Furthermore, freshwater fish likely contain a mixture of contaminants including dioxin and furans which also display a similar mode of toxicity as the PCNs and could enhance the risk to fish consumers.
Disciplines :
Public health, health care sciences & services Chemistry
Author, co-author :
Dong, Shujun; Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Wu, Xingyi; Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China, College of Science, China Agricultural University, Beijing 10081, China
Zhang, Su; Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Cao, Jun; Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Huang, Na; Chinese Academy of Inspection and Quarantine Comprehensive Test Center, Beijing 100123, China
Zou, Yun ; Organic Biological Analytical Chemistry Group, Department of Chemistry, University of Liège, Liège 4000, Belgium
Liu, Puying; Guangdong Ocean University, Zhanjiang 524088, China
Gu, Xiaoyao; Chinese Academy of Inspection and Quarantine Comprehensive Test Center, Beijing 100123, China
Zheng, Xue; Chinese Academy of Inspection and Quarantine Comprehensive Test Center, Beijing 100123, China. Electronic address: zhengxue@caiqtest.com
Wang, Peilong; Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Language :
English
Title :
Polychlorinated naphthalenes in freshwater fish from Beijing markets: Species-specific differences, effects of cooking, and health risk assessment.
This study was supported by the Central Public Interest Scientific Institution Basal Research Fund of the Chinese Academy of Agricultural Sciences (grant no. Y2022PT20 ) and by the Agricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences ( CAAS-ASTIP-IQSTAP-04 ).
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