Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (32): 128-132.doi: 10.11924/j.issn.1000-6850.casb2021-1046

Special Issue: 生物技术 水产渔业

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Residue Characteristics and Risk Assessment of Mercury in Chinese Mitten Crab Culture Environment

WANG Xinchi1(), CAO Guoqing1, YIN Yuting1, WANG Qian2,3,4, SONG Chao1,2,3,4(), CHEN Jiazhang1,2,3,4   

  1. 1Wuxi Fishery College, Nanjing Agricultural University, Wuxi, Jiangsu 214081
    2Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, Jiangsu 214081
    3Laboratory of Aquatic Quality & Safety Risk Assessment for Aquatic Products on Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, Jiangsu 214081
    4Key Laboratory of Aquatic Product Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Beijing 100141
  • Received:2021-11-04 Revised:2022-05-18 Online:2022-11-15 Published:2022-11-09
  • Contact: SONG Chao E-mail:1072851194@qq.com;songc@ffrc.cn

Abstract:

To gain an in-depth understanding of the residue characteristics and risk assessment of mercury in the pond culture environment of Eriocheir sinensis, a total of 14 samples of water bodies and sediment from 7 Eriocheir sinensis aquaculture ponds were collected in Wuxi of Jiangsu. The residue levels of mercury in different forms were analyzed by liquid chromatography-inductively coupled plasma mass spectrometry (LC-ICP-MS), and the risk of mercury residues was assessed by the single-factor method. The results showed that the mercury content in water bodies ranged from ND (not detected) to 18.20 μg/L, mainly inorganic mercury (Hg2+), and other forms included methylmercury (MeHg) and ethylmercury (EtHg). The mercury content in sediment environment ranged from 0.01 to 0.022 μg/g, in which the content of inorganic mercury decreased and the content of methyl mercury increased. Compared with NYT 5361-2016 Environmental Conditions of Pollution-Free Agricultural Products - Freshwater Aquaculture Origin, it was found that the mercury content in the water body exceeded the standard in 5 samples, and the exceeding rate was 71.43%; the mercury content in the sediment environment exceeded the standard in 1 sample, and the exceeding rate was 14.29%. Further research on the ecological risk of water inorganic mercury residues to Eriocheir sinensis showed that the risk quotient ranged from 0 to 0.05, far below 1, indicating that the mercury residues in the water body did not affect the safe growth of Eriocheir sinensis. The detection of heavy metal mercury in aquaculture water is of great significance to the healthy growth of Eriocheir sinensis and food safety.

Key words: Eriocheir sinensis, mercury, residue characteristics, risk assessment

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