龙门山地区水系沉积物中铀含量分布特征

The Uranium Content Distribution and the Pollution Evaluation of Stream Sediments in Longmen Mountain Area

铀元素是具有毒性和放射性的锕系元素之一,对区域环境和人体健康具有极大的危害,开展铀元素污染评价具有重要的现实意义。以龙门山地区主要水系为主要研究对象,采集了大量的水系沉积物样品,对该地区的铀元素分布特征进行了研究。研究表明,大渡河水系沉积物中铀平均质量分数为5.50 mg/kg,绵远河水系沉积物中的铀平均质量分数为3.07 mg/kg,其余河流水系沉积物中铀含量均较低。通过龙门山地区水系沉积物中铀元素分布特征与龙门山地区矿产分布对比发现,煤矿、磷矿开发区是水系主要铀元素来源。

Uranium belongs to actinide, which has toxicity and radioactivity. It has strong negative influences on regional environment and people’s physical fitness,which makes it significantly meaningful to assess the pollution of uranium. This paper mainly studies the river system and the distribution of Uranium of longmen mountain based on the sediment samples. According to the research,the Uranium average content of stream sediment in dadu river is 5. 50 mg/kg,and it is 3. 07 mg/kg in mianyuan river,and the content in the sediment of rest river systems is lower. After comparison between distribution of Uranium and mineral in this area,our study shows that the main resources of Uranium are coal and phosphate development district.