山东省某轻稀土矿区水果和鸡蛋中稀土元素含量及健康风险

目的 了解山东轻稀土矿区与对照区水果和鸡蛋中稀土元素含量的差异及其健康风险。方法 分别采集稀土矿区和对照区附近村民自己种植的水果及自家家禽生产的鸡蛋样品,用电感藕合等离子体质谱法(ICP-MS)测定16种稀土元素含量。结果 矿区和对照区水果中总稀土元素含量分别为142.5 μg/kg和16.1 μg/kg,差异具有统计学意义；矿区核果、仁果、浆果中稀土元素含量分别为47.0 μg/kg、146 μg/kg和279 μg/kg,对照区分别为17.6 μg/kg、18.9 μg/kg和11.0 μg/kg,矿区和对照区仁果、浆果类水果中稀土元素差异均有统计学意义。矿区和对照区鸡蛋中总稀土元素平均值分别为4.32 μg/kg和3.25 μg/kg,差异无统计学意义。矿区和对照区样品中稀土元素均以轻稀土元素为主。矿区和对照区通过水果估计的每日稀土元素摄入量为0.58 μg/(kg·d)和0.067μg/(kg·d),通过鸡蛋估计的每日稀土元素摄入量为0.003 μg/(kg·d)和0.002 μg/(kg·d)。结论 矿区水果中稀土元素高于对照区,鸡蛋中稀土元素含量无差异,水果和鸡蛋均以富集轻稀土元素为特征,通过水果和鸡蛋摄入的稀土元素不会危害人体健康。

Contents and health risk of rare earth elements in fruits and eggs from a REEs mining area,Shandong

Objective To investigate the contents and health risk of rare earth elements (REEs) in fruits and eggs from a REEs mining area in Shandong. Methods Samples were collected from the mining and control areas.16 REEs were determined by inductively coupled plasma-mass spectrometry (ICP-MS). Results The total contents of REEs in fruits from the mining and control areas were 142.5 μg /kg and 16.1 μg /kg.Differences were statistically significant.In the mining area,the REE contents of stone fruit,pome fruit,and berry fruit were 47.0 μg /kg,146 μg /kg,and 279 μg /kg,respectively.In the control area,the REE contents were 17.6 μg/kg,18.9 μg/kg,and 11.0 μg/kg,respectively.The differences of REE contents in pome fruit and berry fruit between mining and control areas had statistically significance.For eggs,the total contents of REEs from the mining and control areas were 4.32 μg /kg and 3.25 μg /kg.There was no significant difference.The REEs in samples were dominated by light REEs for fruits and eggs of both areas.The intake of REEs through fruits was 0.58 μg/kg/d and 0.067 μg/kg/d for the mining and control areas,and the intake of REEs through eggs was 0.003 μg/kg/d and 0.002 μg/kg/d.The estimated daily intakes were much lower than the acceptable daily intake value. Conclusion The REE contents in fruits from the mining area were statistically higher than that of control area,while the difference of eggs between the mining and control areas was not statistically significant.The REEs in fruits and eggs were characterized with enriched light REEs.The intake of REEs through fruits and eggs will not damage human health.