某铀矿周边常用蔬菜铀富集水平的调查分析

Survey and Analysis of Uranium Enrichment Levels in Vegetables Around an Uranium Mine

目的调查我国某铀矿周边地区5种蔬菜产品中铀含量水平,为这一地区环境中铀放射性水平和食品安全评估提供基础数据。方法采集矿区内外和农田表层土壤,以及农田中常见食用蔬菜,采用高分辨电感耦合等离子体质谱仪(ICP-MS)进行铀含量检测。结果所采集的蔬菜样品中油麦菜可食用部分含量最高为1.09μg/g,香菜可食用部分含量最低为0.0850μg/g,所采蔬菜样品中铀含量均未超过标准限值,处于安全水平。研究区农田土壤铀含量处于背景值水平,土壤中铀含量为安全水平,尾矿渣堆积库和周边道路旁为高值区。结论研究区农田土壤和食品中铀含量处于安全水平,未被污染;尾矿渣堆积地和矿渣周边运输道路已污染,需进一步采取治理措施。

Objective To investigate the enrichment levels of uranium in five kinds of vegetable products around an uranium mine in China.This study provided the basic data for the radioactivity level and food safety assessment for this region.Methods The surface soil was collected in and out of the mining area and the common edible vegetable productions in the farmland.High resolution inductively coupled plasma mass spectrometry（ICP-MS） was used for the determination of uranium content.Results The edible part of lettuce was the highest content of 1.09 μg/g in the collected samples of vegetables,and edible coriander content as low as 0.0850 μg/g,the uranium content in vegetable samples did not exceed the standard limits in safe level.The content of uranium in the soil of the vegetable sampling area was in the background value,the content of uranium in the soil was relatively safe,and the level of the uranium tailings and the surrounding road was high.Conclusion The uranium content of farmland soil and food were safe land uncontaminated in the study area.The enrichment levels of uranium tailings and surrounding transportation roads had been polluted,need to take further measures.