小龙虾(克氏原螯虾)中铜含量富集现状及其环境来源分析

Copper enrichment status in crayfish (Procambarus clarkii) and its environmental sources analysis

中文关键词:  小龙虾  铜  富集现状  风险评估  来源分析

英文关键词:Procambarus clarkii  copper  enrichment status  risk assessment  source analysis

中文摘要:

      目的 调查小龙虾及其养殖环境中铜的含量, 探讨小龙虾中铜元素的富集现状及其可能的环境来源。方法 在我国主要的小龙虾养殖产地采集小龙虾及其养殖环境样本(养殖用水、池塘底泥), 采用微波消解法进行消解, 电感耦合等离子体质谱法进行样品中铜含量的测定。结果 小龙虾中铜含量均值为10.22 mg/kg, 积累量按照头壳、背壳、肝胰腺、虾肉依次递减, 其占完整小龙虾中铜积累量比例分别为17.74%、15.97%、8.75%、5.11%。小龙虾中铜含量与其养殖池塘底泥中的铜含量具有正相关性, 相关系数为0.39。A省小龙虾中铜含量显著高于其他地区(P<0.05)。结论 我国小龙虾及其养殖水体中铜含量均在国家规定的标准限量以内, 但部分地区小龙虾养殖池塘底泥中的铜含量超出国家标准, 池塘底泥是小龙虾中铜重要的环境来源, 可能造成潜在风险。因此, 仍需要加强对小龙虾及其养殖环境中铜含量的监管。

英文摘要:

      Objective To investigate the copper content in Procambarus clarkii and its culture environment, and explore the exposure status and possible environmental sources of copper in Procambarus clarkii. Methods Procambarus clarkii and their culture environment samples (water for farming, mud from the bottom of a pond) were collected from major Procambarus clarkii farms in China, digested by microwave digestion method, and the content of copper in the samples was determined by inductively coupled plasma mass spectrometry. Results The average content of copper in Procambarus clarkii was 10.22 mg/kg, and the accumulation of copper decreased according to the head shell, back shell, hepatopancreas and meat, and their proportionsin whole Procambarus clarkii were 17.74%, 15.97%, 8.75% and 5.11%, respectively. There was a positive correlation between the copper content in Procambarus clarkii and the copper content in the bottom mud of aquaculture pond, and the correlation coefficient was 0.39. The copper content of Procambarus clarkii in A Province was significantly higher than that in other areas (P<0.05). Conclusion The copper content in Procambarus clarkii and its aquaculture water in China is within the standard limit set by the state, but in some parts of crawfish farming pond sediment of copper content exceeds the national standard, and the pond sediment is an important environmental source of copper content in the Procambarus clarkii, which pose a potential risk for the safety of Procambarus clarkii. Therefore, it is still necessary to strengthen the supervision of copper content in crayfish and its breeding environment.