微宇宙尺度下硫双二氯酚在锦鲤、泥鳅和沉积物中的富集和代谢特性
Bioconcentration and biological metabolism characteristics of bithionol in koi, loach, and sediment at microcosmic scale
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摘要: 在微宇宙尺度下探究上覆水生物锦鲤、底栖生物泥鳅不同器官对硫双二氯酚的富集和代谢特性.实验结果表明,锦鲤可通过水相富集硫双二氯酚,在鱼肉、鱼鳃和内脏中浓度顺序为内脏 > 鱼肉 > 鱼鳃,脂重标化动力学生物富集系数BCFkl分别为内脏623,鱼肉228和鱼鳃116;代谢速率顺序为内脏 > 鱼鳃 > 鱼肉,对应的净化半衰期分别为内脏19.3 d,鱼鳃33 d和鱼肉38.5 d,且生物扰动会增加锦鲤对硫双二氯酚的富集.锦鲤和泥鳅水相富集硫双二氯酚的浓度没有显著性差异,说明上覆水生物锦鲤与底栖生物泥鳅富集硫双二氯酚的能力相似.在泥鳅的鱼籽中检测出硫双二氯酚,说明硫双二氯酚有可能残留在泥鳅的受精卵中.Abstract: Bioconcentration and biological metabolism characteristics of bithionol for the overlying aquatic organisms koi could benthic loach were evaluated at microcosmic scale. The results showed that:koi could enrich bithionol from water phase, and the concentrations of bithionol in different tissues were in the order of visceral > koi muscle > gills, fat standardized dynamic coefficient of biological concentration BCFkl was respectively 623 in viscera, 228 in koi muscle, and 116 in gill, respectively. While the metabolic rate of bithionol was in the order of visceral > gills > koi muscle, the corresponding purification half-life of bithionol in the visceral, gills, and koi muscle was 19.3 d, 33 d, and 38.5 d, respectively. Biological disturbance promoted koi to accumulate bithionol. There was no significant difference in the concentration of bithionol between koi and loach, indicating that the ability of the overlaying aquatic koi and the benthic loach had similar bioaccumulation ability of bithionol. Detected bithionol from fish roe showed that bithionol could remain in fertilized egg of loach.
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Key words:
- bithionol /
- bioconcentration /
- biological metabolism /
- koi /
- loach
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