期刊论文

中文

生态环境学报

1674-5906

2015

24

1

156-162

10.16258/j.cnki.1674-5906.2015.01.023

41373115:国家自然科学基金 40973070:国家自然科学基金 2014SCX08:湖南省研究生科研创新项目

本校为第一机构

铀(U)矿冶过程中产生了大量铀废石。通常认为其放射性核素含量低,大多沿山谷露天自然堆放,一般不对堆场做防渗漏处置,对铀废石可能产生的潜在环境影响尚未引起重视。以广东某花岗岩型铀矿山的一个废石堆周边土壤为研究对象,在废石堆上、下游方向分别采集了2条(即BP_1和BP_2,视作背景土壤,距离废石堆的距离分别为10和20 m)和3条土壤剖面(即WP_1、WP_2和WP_3,视作潜在U污染土壤,距离废石堆的距离分别为50、100和180m)。通过对剖面间U分布特征的对比,定量估算了受污染土壤中外源U的输入通量;结合逐级化学提取技术,分析了U在土壤剖面的赋存形态及其环境有效性。结果表明:1)铀废石堆对周边土壤产生了...

There are large amounts of waste rocks produced during uranium mining and hydrometallurgy in China. As their radionuclide contents are generally considered as low, most of these rocks are stacked along the valleys and exposed to open air without percolation-proofing for the sites that store them. Currently, the potential environmental radioactive risks posed by these rocks have not yet received extensive attention. In his study, five soil profiles were selected from the area around a uranium waste rock pile in a granite-type uranium mine in Gua...