江苏沿海浒苔中重金属含量及食用风险分析

在测定江苏沿海浒苔中重金属含量的基础上，对浒苔食用安全和健康风险进行了评价，为浒苔资源化利用提供了可行途径。实验采用无火焰石墨炉法和原子荧光法对江苏沿海地区浒苔样品中5种重金属进行了检测，并分析了其潜在的可能来源。结果表明，浒苔中5种重金属均有检出，Cu、Cd、Cr、Pb和As的含量范围分别为（7.01~10.85）×10-6、（0.61~1.77）×10-6、（3.97~9.39）×10-6、（1.34~4.74）×10-6和（0.78~1.66）×10-6（干重）。与相关报道相比，浒苔中Cu含量较低，Cd含量较高。Pb的含量超出国标22%~322%之间，As仅有一个点超出标准10.6%。相关性分析的结果表明浒苔中的重金属可能与沿海沉积物中重金属污染密切相关。浒苔安全与食用风险评价结果表明，多种重金属带来的健康风险皆低于5.0×10-5/a，近海捕捞的浒苔食用安全性较高。因此，目前江苏沿海重金属污染不会对市民食用浒苔带来健康风险。

Analysis on content and edible risk assessment of heavy metals in Enteromorpha prolifra from Jiangsu coastal

On the basis of the investigation on the content of heavy metals in the Enteromorpha prolifera from Jiangsu coastal, the food safety and health risks of Enteromorpha prolifera were evaluated in the present study. Five kinds of heavy metals in Enteromorpha prolifera from Jiangsu coastal were analyzed using flame-free graphite furnace and atomic fluorescence spectrometry, and potential sources of heavy metals in Enteromorpha prolifera were also analyzed. The results showed that the contents of Cu, Cd, Cr, Pb and As in Enteromorpha prolifera were in the range of(7.01~10.85)×10-6, (0.61~1.77)×10-6, (3.97~9.39)×10-6, (1.34~4.74)×10-6 and(0.78~1.66)×10-6(dry weight), respectively. Compared with the relevant results reported, , the content of Cu in Enteromorpha prolifera was low and Cd was high. Pb content exceeded the standard by 22%~322%. For the As, there is only one site beyond the standard by 10.6%. The results of the correlation analysis show that heavy metals in Enteromorpha prolifera might be closely related to those in sediments. The results of safety and edible risk assessment of Enteromorpha prolifera showed that the health risks caused by heavy metals were all lower than 5.0×10-5/a, the edible safety of the Enteromorpha prolifera from offshore is high. Therefore, the pollution of heavy metals in Jiangsu coastal area will not bring health risks to the consumers.