房屋建筑内混凝土氡污染含量动态监测方法研究

Research on Dynamic Monitoring Method of Concrete Radon Pollution Content in Buildings

研究房屋建筑物内混凝土释放氡气(Rn)污染室内空间的动态监测方法。使用气相色谱设备对室内空气进行持续观察,采用对比气样色谱差值法进行干扰数据屏蔽,使用移动数据窗口叠加法避免数据不连续和不完备特征引起数据质量问题,再使用投影空间复合放大法对观测数据进行放大,最终获得小于30 s检测周期的实时监测数据。实验结果表明,气相色谱法获得的检测结果除对Po的检测敏感度低于活性炭盒法外,其他结果质量均优于活性炭盒法,其检测结果接近径迹蚀刻法的检测质量。气相色谱法可推荐作为氡气污染动态监测的数据源。

To study the dynamic monitoring method of indoor space pollution caused by the release of radon gas(Rn)from concrete in buildings.The indoor air is continuously observed by gas chromatography equipment,the interference data is shielded by contrast gas chromatography difference method,the data quality problems caused by data discontinuity&incompleteness are avoided by moving data window superposition method,and the observation data is amplified by projection space composite amplification method,and the real-time monitoring data with detection period less than 30 s is finally obtained.The experimental results show that the detection results obtained by gas chromatography are better than the activated carbon box method except that the detection sensitivity of Po is lower than that of the activated carbon box method,and the detection results are close to the detection quality of the track etching method.Gas chromatography can be recommended as a data source for dynamic monitoring of radon pollution.