2017-2024年广西某离子型稀土分离企业周围环境放射性水平分析OA
Radioactive Level in the Surrounding Environment of Ionic Rare Earth Separation Enterprise in Guangxi(2017-2024)
为掌握离子型稀土矿分离企业周边的放射性水平及其变化趋势,评估冶炼分离过程对周边环境的潜在影响,以广西某典型稀土分离企业为对象,在2017-2024年期间,连续8年系统监测企业周边环境,获取了时空分布数据,掌握了企业周围辐射环境的动态特征及变化趋势.企业周边γ剂量率最大值为104 nGy/h,氡浓度最大值为69.0 Bq/m3;固态环境样品中 238 U、232 Th、226 Ra、40K 比活度分别为 36.8～88.9、28.9～180、27.7～107、452～479 Bq/kg;气态环境样品中238U、232Th、226Ra、40K 比活度分别为＜29.8、＜6.95～27.6、＜6.28～27.6、＜19.3～33.5 Bq/kg;液态环境样品中铀、钍质量浓度分别为0.057～3.7、0.019～0.948 μg/L,226Ra、总α、总β活度浓度分别为2.01～21.9 mBq/L、0.017～0.123 Bq/L、0.027～0.099 mBq/L;液态流出物样品中 U、Th 总量为 0.241～168 μg/L,226Ra、210Po、210Pb 活度浓度为16.2～1 870、1.35～89.1、2.56～96.8 mBq/L.结果表明,2017-2024年,该离子型稀土分离企业周围环境γ辐射剂量率、氡浓度水平、地表水、地下水、气溶胶、土壤、底泥的放射性指标基本符合标准要求,企业周边辐射环境总体稳定,部分指标的明显波动与污水处理工艺调整密切相关.
In order to grasp the radioactive level and its changing trend around the ionic rare earth ore separation enterprise,and evaluate the potential impact of smelting separation process on the sur-rounding environment,this study takes a typical rare earth separation enterprise in Guangxi as an ex-ample.From 2017 to 2024,a systematic tracking and monitoring was carried out for 8 consecutive years,and the spatial and temporal distribution data of the radiation environment were obtained,and the dynamic characteristics and changing trends of the radiation environment around the enterprise were grasped.The maximum gamma dose rate around the enterprise is 104 nGy/h,and the maximum radon concentration is 69.0 Bq/m3.The specific activities of 238U,232Th,226Ra,and 40K in solid-state environmental samples are 36.8-88.9,28.9-180,27.7-107 Bq/kg,and 452-479 Bq/kg,respectively.The specific activities of 238 U,232 Th,226Ra,and 40 K in gaseous environmental samples are＜29.8,＜6.95-27.6,＜6.28-27.6,and＜19.3-33.5 Bq/kg,respectively.The mass concentrations of urani-um and thorium in liquid environmental samples are 0.057-3.7 and 0.019-0.948 μg/L,respectively.The activity concentrations of 226 Ra,total alpha,and total beta are 2.01-21.9 mBq/L,0.017-0.123 Bq/L,and 0.027-0.099 mBq/L,respectively.The total amount of U and Th in the liquid efflu-ent sample is 0.241-168 μg/L,and the activity concentrations of 226Ra,210Po,and 210Pb are 16.2-1 870,1.35-89.1,2.56-96.8 mBq/L.According to the analysis of monitoring results,from 2017 to 2024,the gamma radiation dose rate and radon concentration level in the surrounding environment of the ion type rare earth separation enterprise,as well as the radioactive indicators of surface water,groundwater,aerosols,soil,and sediment,basically meet the standard requirements.The overall ra-diation environment around the enterprise is stable,and the obvious fluctuations in some indicators are closely related to the adjustment of sewage treatment processes.The results provide a reliable refer-ence for the radiation environment management of associated radioactive mining enterprises.
彭文斌;向辉云;林明媚;林晨;江岳;黄彬丽
广西壮族自治区辐射环境监督管理站,广西南宁 530222广西壮族自治区辐射环境监督管理站,广西南宁 530222广西壮族自治区辐射环境监督管理站,广西南宁 530222广西壮族自治区辐射环境监督管理站,广西南宁 530222广西壮族自治区辐射环境监督管理站,广西南宁 530222广西壮族自治区辐射环境监督管理站,广西南宁 530222
资源环境
离子型稀土伴生放射性矿辐射监测放射性环境影响流出物
ionic rare earthassociated radioactive oreradiation monitoringradioactivityenviron-ment impacteffluent
《铀矿冶》 2026 (1)
154-162,9
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