大亚湾海洋生物体内铅的含量与风险评估

Analysis of lead content in marine organisms and risk assessment in Daya Bay

文章分析讨论了大亚湾海洋生物体铅(Pb)的含量与变化特征。统计分析结果显示,大亚湾海域生物体Pb的含量服从正态分布,其平均值为(0.33±0.10)mg.kg-1。甲壳类Pb的含量明显高于头足类和鱼类。根据风险评估的4个步骤,确定Pb的毒性,描述了Pb对人体健康的不良影响,采用粗略的点评估方法计算了Pb的膳食暴露量,并简述了Pb的风险。结果表明,大亚湾海洋生物体Pb的膳食暴露量处于安全范围。

The content and variation features of lead in marine organisms in Daya Bay were discussed in the paper. The results of the statistical analysis indicated that the lead content in the marine organisms in that sea area presented itself as a normal distribution, and the average value was （0. 33 ±0. 10） mg.kg^-1. The lead content in the crustacean samples were obviously higher than that in cephalopod and fish samples. The research was conducted by following the four procedures of risk assessment. Therefore, the toxicity of lead was identified; its adverse effects on human health were described; the dietary exposure of lead in aquatic product intake was calculated using the Crude Point Estimate method, and finally the risk of lead was described. The results showed that the dietary exposure of the intake of the marine organisms captured from Daya Bay was within the reference dose.