Distribution of thorium in soils surrounding the rare-earth tailings reservoir in Baotou, China
Distribution of thorium in soils surrounding the rare-earth tailings reservoir in Baotou, China
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包头稀土尾矿库周边土壤中钍的分布
DOI：
10.1007/s10967-013-2814-2
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发表时间：
2014-03
影响因子：
1.6
通讯作者：
Liao, Hai-qing
中科院分区：
文献类型：
--
作者：
Chen, Sheng;Wu, Feng-chang;Sun, De-zhi;Liao, Hai-qing
对位于内蒙古北方包头草原附近的稀土尾矿库周围土壤中钍的分布进行了研究。在稀土尾矿库周边8个不同方向采集了77个土壤样品，测定了232 Th。232 Th的活度范围为9.1 ~ 307.1 Bq kg− 1，平均值为42.4 Bq kg−1。部分样品的钍污染程度高于全球平均水平，表明这些土壤受到了钍的污染。钍的扩散系数参数与风强度参数之间存在很高的线性相关系数，表明232 Th的分布主要与风速和风向有关。采用地累积指数法评价了钍污染水平，采用克里格法估算了各污染水平下的土地面积。计算结果表明，各污染级别的面积为：中-强污染2.10 km 2，中度污染38.29 km 2，轻度污染47.19 km 2。其余738.63 km 2的土地调查是明确的钍污染。
Thorium distribution was investigated in the soils surrounding the rare-earth (RE) tailings reservoir near the Baotou grassland of Inner Mongolia, northern China. Totally 77 soil samples were collected from 8 different directions in the periphery of the RE tailings reservoir, and then were determined for232Th. The232Th activity degree ranges from 9.1 to 307.1 Bq kg−1with an average value of 42.4 Bq kg−1. In some samples, the degree is higher than that of global average, showing that these soils were polluted by thorium. There is a high linear correlation coefficient between the thorium diffusion coefficient parameter and the wind intensity parameter which indicates that the distribution of232Th is mainly correlated with wind speed and direction. The geo-accumulation index method was used to evaluate the level of thorium pollution, and the Kriging method was applied to estimate the land area at each level. By calculation, result shows that the area at each pollution level is 2.10 km2with medium-strong pollution, 38.29 km2with medium pollution, and 47.19 km2with slight pollution. The remaining 738.63 km2of land investigated is clear from thorium pollution.
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影响因子：
2.3
作者：
P. Guo;X. Jia;Tai-cheng Duan;Jingwei Xu;Hang-ting Chen
通讯作者：
P. Guo;X. Jia;Tai-cheng Duan;Jingwei Xu;Hang-ting Chen
影响因子：
2.3
作者：
M. Psichoudaki;H. Papaefthymiou
通讯作者：
M. Psichoudaki;H. Papaefthymiou
DOI：
--
发表时间：
2002-06
期刊：
--
影响因子：
--
作者：
岩崎 民子
通讯作者：
岩崎 民子
影响因子：
1.5
作者：
R. Obed;I. P. Farai;N. Jibiri
通讯作者：
R. Obed;I. P. Farai;N. Jibiri
DOI：
10.2134/jnrlse.2004.0051
发表时间：
2004
期刊：
Journal of Natural Resources and Life Sciences Education
影响因子：
--
作者：
Joan Wong
通讯作者：
Joan Wong