Shandong Center for Disease Control and Prevention, Jinan, Shandong, P.R. China.
Shandong Center for Food Safety Risk Assessment, Jinan, Shandong, P.R. China.
Sci Rep. 2017 Aug 29;7(1):9772. doi: 10.1038/s41598-017-10256-7.
To investigate the concentrations of rare earth elements in cereals and assess human health risk through cereal consumption, a total of 327 cereal samples were collected from rare earth mining area and control area in Shandong, China. The contents of 14 rare earth elements were determined by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The medians of total rare earth elements in cereals from mining and control areas were 74.22 μg/kg and 47.83 μg/kg, respectively, and the difference was statistically significant (P < 0.05). The wheat had the highest rare earth elements concentrations (109.39 μg/kg and 77.96 μg/kg for mining and control areas, respectively) and maize had the lowest rare earth elements concentrations (42.88 μg/kg and 30.25 μg/kg for mining and control areas, respectively). The rare earth elements distribution patterns for both areas were characterized by enrichment of light rare earth elements. The health risk assessment demonstrated that the estimated daily intakes of rare earth elements through cereal consumption were considerably lower than the acceptable daily intake (70 μg/kg bw). The damage to adults can be neglected, but more attention should be paid to the effects of continuous exposure to rare earth elements on children.
为了研究谷物中稀土元素的浓度，并通过谷物消费评估人类健康风险，本研究从中国山东的稀土矿区和对照区共采集了 327 个谷物样本。采用电感耦合等离子体质谱法（ICP-MS）测定了 14 种稀土元素的含量。矿区和对照区谷物中总稀土元素的中位数分别为 74.22μg/kg 和 47.83μg/kg，差异有统计学意义（P<0.05）。小麦中的稀土元素浓度最高（矿区和对照区分别为 109.39μg/kg 和 77.96μg/kg），玉米中的稀土元素浓度最低（矿区和对照区分别为 42.88μg/kg 和 30.25μg/kg）。两个地区的稀土元素分布模式均以轻稀土元素富集为特征。健康风险评估表明，通过谷物消费摄入的稀土元素的估计日摄入量远低于可接受日摄入量（70μg/kg bw）。成年人的损害可以忽略不计，但应更加关注儿童持续暴露于稀土元素的影响。
