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目的 研究白云鄂博稀土铁矿接尘矿土长期吸入高浓度含钍稀土矿尘及的短寿命子体后对矿工健康的影响。方法 采用负高压呼出气中子体测定装置。结果 流行病学调查表明 ,接尘矿工肺癌的SMR明显高于对照组的SMR ,差别十分显著。结论 首次发现接尘矿工由于长期 ( 30a以上 )吸入高浓度含钍稀土矿尘及短寿命子体后可以诱发超额肺癌的发生。长期吸烟和采矿现场的γ外照射的协同作用不能排除。
Objective To study the effects of prolonged inhalation of thorium-rich rare earth mine dust and short-lived progeny of on the miners’ health in the dust-bearing ore of Baiyunebo rare earth iron mine. Methods Using negative pressure exhaled gas popliteal device. Results Epidemiological investigation showed that the SMR of dust miners exposed to dust was significantly higher than that of the control group, the difference was very significant. Conclusion It is the first time that dust miners can induce excessive lung cancer after long-term (over 30 years) inhalation of thorium-rich rare earth mine dust and short-lived progeny. The synergy between long-term smoking and external gamma exposure at the mining site can not be ruled out.