Distribution and modes of occurrence of uranium in coals of Eastern Yunnan,China
Xin Wang1
Qiyan Feng2
Qingjun Meng2
Fei Liu1
Qihang Cao1
Guijian Liu3
1.College of Life Sciences,Huaibei Normal University,Huaibei 235000,China2.School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China3.CAS Key Laboratory of Crust-Mantle Materials and the Environments,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China
摘要：Uranium is an environmentally hazardous element,and is commonly present at trace levels (2.4 μg/g for world coals) in coal deposits.However,selected coal deposits could be highly enriched in uranium.In this study,15 coal samples were collected from Eastern Yunnan coal deposits,China,aiming to characterize the distribution and the occurrence of uranium in those coals.In studied samples,uranium content varied from 0.36 to 8.28 μg/g,with an average value of 3.76 μg/g.Generally,uranium content in coals from northern coal mines (3.02 ± 2.44 μg/g,n =5) were lower than it in southern coal mines (4.13 ± 2.30 μg/g,n =10).Uranium in coal samples showed no obvious correlation with total sulfur,whereas was positively correlated with ash yield.The results of sequential chemical extraction procedure confirm that organic-bound is the dominant occurrence of uranium.The slight enrichment of uranium in studied coals was probably attributed to sedimentation processes,hydrological conditions and tectonic structure of the coal deposits.
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论文发表日期：2021-12-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：10( 1262-1271 )
英文信息