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Features of distribution of uranium and thorium in red mud
Hannian Gu;  Ning Wang;  Yongqiong Yang;  Chengdong Zhao
Source PublicationPhysicochemical Problems of Mineral Processing

Natural radioactive elements such as uranium and thorium restrict the use of red mud as building materials or additives, and may cause environmental problems. The distribution features of U and Th in red mud was studied from micro and macro analysis, using EPMA, LA-ICP-MS, and methods of mineralogy and beneficiation. Based on the micro-area scanning analysis, main chemical compositions in red mud, such as Ca, Al, Si, Na, and K are dispersive while Fe and Ti mainly tend to concentrate in granular phases. Based on the in-situ analysis, the distribution of main elements and most trace elements in micro-zone of red mud was homogeneous. In micro-zone area, the variation tendency of thorium content was similar with Y in red mud samples. By means of the methods of mineralogy and beneficiation, red mud samples were separated into different fractions. U and Th tend to be enriched in the low density fraction of the red mud. Th presented a high concentration in the finest particle size fractions of the red mud. Neither U or Th was regularly distributed in various magnetic red mud fractions. Thorium fingerprint peaks were determined in perovskite by EDX under TEM, which is proposed to be one of the radioactivity sources in Bayer red mud.

Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Geochem, Key Lab High Temp & High Pressure Study Earths In, Guiyang 550081, Peoples R China
2.Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang 550001, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Hannian Gu;Ning Wang;Yongqiong Yang;Chengdong Zhao. Features of distribution of uranium and thorium in red mud[J]. Physicochemical Problems of Mineral Processing,2017,53(1):110-120.
APA Hannian Gu;Ning Wang;Yongqiong Yang;Chengdong Zhao.(2017).Features of distribution of uranium and thorium in red mud.Physicochemical Problems of Mineral Processing,53(1),110-120.
MLA Hannian Gu;Ning Wang;Yongqiong Yang;Chengdong Zhao."Features of distribution of uranium and thorium in red mud".Physicochemical Problems of Mineral Processing 53.1(2017):110-120.
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