包头市某稀土尾矿库辐射环境监测与分析

摘要/Abstract

摘要： 对包头市某稀土尾矿库的辐射环境水平进行了监测与分析。结果表明:尾矿库坝内库渣的γ空气吸收剂量率均值达680.3 nGy/h,约为包头市城区γ空气吸收剂量率均值的6.6倍;三个监测年度内土壤样品中钍-232活度浓度为36.1～364.7 Bq/kg,与2019年全国监测范围值相比处于正常波动范围内;尾矿库中的库渣平均钍-232活度浓度是1.417 Bq/g,尾矿库内的库渣应受到严格的监管,避免放射性污染扩散;尾矿库渗出水形成的尾矿库车间循环水含有极少量的放射性钍,其钍核素浓度在监测期间与当地地下水本底水平相当。

关键词: 尾矿库, γ剂量率, 钍核素, 辐射环境

Abstract: The radiation environment level of a typical rare earth tailing pond in Baotou City is monitored and analyzed. The results show that the average γ-radiation dose rate of the slag in the tailings dam is 680.3 nGy/h, which is about 6.6 times of the average background γ-radiation dose rate in Baotou city. The Th-232 activity concentration in soil samples was from 36.1 to 364.7 Bq/kg during the three monitoring years, which was within the normal fluctuation range compared with the national monitoring range in 2019. The average activity concentration of Th-232 in the tailing pond was 1.417 Bq/g. The tailing reservoir should be strictly supervised to avoid the spread of radioactive contamination. The circulating water of tailing pond workshop formed by tailing pond seepage contains a very small amount of radioactive thorium, and its thorium nuclide concentration is similar to the local groundwater background level during the monitoring period.

Key words: tailing pond, gamma radiation dose rate, thorium nuclide, radiation environment

中图分类号:

X837

邬东. 包头市某稀土尾矿库辐射环境监测与分析[J]. 辐射防护, 2025, 45(4): 349-354.

WU Dong. Radiation environment monitoring and analysis of a rare earth tailing pond in Baotou[J]. RADIATION PROTECTION, 2025, 45(4): 349-354.

参考文献

[1] 程建忠, 车丽萍. 中国稀土资源开采现状及发展趋势[J]. 稀土, 2010, 31(2): 65-69+85.
CHENG Jianzhong, CHE Liping. Current mining situation and potential development of rare earth in China[J]. Chinese Rare Earths, 2010, 31(2): 65-69+85.
[2] 冀东, 杜娟, 张贺飞, 等. 我国伴生放射性废渣特点及处置案例[J]. 核技术, 2023, 46(1): 32-39.
JI Dong, DU Juan, ZHANG Hefei, et al. Characteristics and disposal cases of associated radioactive waste residues in China[J]. Nuclear Techniques, 2023, 46(1): 32-39.
[3] 陈彪, 孙庆, 宋文磊, 等. 白云鄂博矿床钍富集过程及空间分布规律[J]. 地质学报, 2023, 97(11): 3535-3549.
CHEN Biao, SUN Qing, SONG Wenlei, et al. Thorium enrichment process and spatial distribution in the Bayan Obo deposit[J]. Acta Geologica Sinica, 2023, 97(11): 3535-3549.
[4] 高思旖, 杨春, 谢树军, 等. 我国伴生放射性矿辐射环境监管的思考[J]. 核技术, 2023, 46(1): 1-7.
GAO Siyi, YANG Chun, XIE Shujun, et al. Consideration on radiation environmental supervision of associated radioactive mines[J]. Nuclear Techniques, 2023, 46(1): 1-7.
[5] 廖燕庆, 卢德雄, 彭崇, 等. 广西某铀矿山退役治理后环境放射性调查与分析[J]. 辐射防护, 2017, 37(1): 62-66+72.
LIAO Yanqing, LU Dexiong, PENG Chong, et al. Investigation and analysis of environmental radioactivity for a decommissioned Uranium mine in Guangxi Province[J]. Radiation Protection, 2017, 37(1): 62-66+72.
[6] Azizi M, Faz A, Zornoza R, et al. Environmental pollution and depth distribution of metal(loid)s and rare earth elements in mine tailing[J]. Journal of Environmental Chemical Engineering, 2022, 10(3): 107526.
[7] 魏光普, 于晓燕, 闫伟, 等. 轻稀土尾矿库周边土壤中La和Ce分布特征[J]. 稀土, 2019, 40(6): 35-41.
WEI Guangpu, YU Xiaoyan, YAN Wei, et al. Distribution characteristics of La and Ce in soil around a rare earth tailings reservoir[J]. Chinese Rare Earths, 2019, 40(6): 35-41.
[8] 中核第四研究设计工程有限公司.伴生放射性物料贮存及固体废物填埋辐射环境保护技术规范(试行): HJ 1114—2020[S]. 北京:中国标准出版社, 2020.
[9] 中华人民共和国生态环境部. 关于发布《伴生放射性矿开发利用企业环境辐射监测及信息公开办法(试行)》的公告[EB/OL]. (2018-07-05)[2024-05-22].https://www.mee.gov.cn/xxgk2018/xxgk/xxgk03/201807/t20180711_630057.html.
[10] 潘三铭, 蔡芙茂, 王灵秀, 等. 包头地区环境陆地γ辐射剂量水平调查[J]. 辐射防护, 1986,6(4): 261-266.
PAN Sanming, CAI Fumao, WANG Lingxiu, et al. Investigation of enuironmental terrestrial gamma-radiation level leve in Baotou[J]. Radiation Protection, 1986,6,6(4): 261-266.
[11] 蔡英茂. 包头地区土壤中天然放射性核素含量调查[J]. 辐射防护, 1986,6(4): 283-286.
CAI Yingmao. Survey of natural radionucide contentsin soil in Baotou area[J]. Radiation Protection, 1986(4): 283-286.
[12] 生态环境部核与辐射安全中心,江西省地质局实验测试大队(江西核工业环境保护中心),中国辐射防护研究院,等. 伴生放射性矿开发利用场址土壤辐射风险评估技术规范: T/BSRS 090—2023[S].北京:中国标准出版社, 2023.
[13] 国家环境保护局. 污水综合排放标准: GB 8978—1996[S]. 北京:中国标准出版社, 1996.
[14] 杜学林, 李文元, 付叔, 等. 内蒙古自治区水体中天然放射性核素浓度调查研究[J]. 辐射防护, 1993, 13(2): 131-135.
DU Xuelin, LI Wenyuan, FU Shu, et al. Investigation of natural radioactivity level of the waters in Inner Mongolia[J]. Radiation Protection, 1993, 13(2): 131-135.
[15] 环境保护部与国家质量监督检验检疫总局. 稀土工业污染物排放标准: GB 26451—2011[S]. 北京:中国环境科学出版社, 2011.
[16] 董晓辉, 帅震清, 谢家理. 稀土工业固体废物钍的浸出毒性研究[C]//第三次全国天然辐射照射与控制研讨会论文汇编. 包头, 2010: 396-400.