山东省某轻稀土矿区蔬菜中稀土元素含量调查

Survey on the contents of rare earth elements in vegetables of a rare earth ore area,Shandong province

目的了解山东轻稀土矿区蔬菜中稀土元素含量。方法 2014年8月分别采集稀土矿区和非矿区附近村民自己种植的蔬菜样品,用电感藕合等离子体质谱仪(ICP-MS)测定16种稀土元素的含量。结果矿区蔬菜中总稀土元素含量为(1 555.76±10 328.00)μg/kg,非矿区蔬菜中总稀土元素含量为(82.07±252.22)μg/kg(P<0.05),矿区蔬菜中稀土元素含量高于非矿区。不同蔬菜中稀土元素含量差别较大,含量由大到小为:叶菜类>根菜类>豆类>茄果类>瓜果类。结论矿区蔬菜稀土元素含量高于非矿区,同一地区不同蔬菜中稀土元素含量差别较大,不宜种植和长期食用高富集稀土元素的蔬菜。

Objective To understand the contents of rare earth elements contents in the vegetables of a light rare earth ore area in Shandong province. Methods The vegetable samples were collected from mining area and non-mining area August,2014.The contents of 16 rare earth elements（REEs）were determined by Inductively Coupled Plasma-Mass Spectrometry（ICP-MS）. Results The total contents of REEs in vegetables from mining area were 1 555.76±10 328.00μg/kg,while,in non-mining area,the total REEs were 82.07±252.22μg/kg.Differences between mining area and non-mining area were statistically significant（P〈0.05）.The contents of REEs in different vegetables had obvious differences.The content of total REEs declined in sequence from leaf vegetables,root vegetables,leguminous vegetables,solanaceous vegetables,and gourd vegetables. Conclusion The REEs contents of vegetables from mining area are higher than those from non-mining area.The contents of REEs in different vegetables of the same area have obvious differences.The vegetables which can enrich REEs are not suitable for planting and long-term consumption.