大气中^(210)Pb活度浓度水平与空气质量相关性研究

Correlation Between Activity Concentration of ^(210) Pb in the Atmosphere and Air Quality

文章用BE6530宽能型高纯锗γ能谱仪对2018-2020年采集的93组湖北武汉、黄石、襄阳、宜昌四地的气溶胶样品进行γ能谱分析。监测结果表明,四城市^(210)Pb活度浓度最大值为5.15 m Bq/m^(3),最小值为0.308 mBq/m^(3),平均值为1.668 m Bq/m^(3)。公众成员吸入^(210)Pb所接受的年有效剂量范围为(7.7E-07~3.0E-05)Sv,最高为10;数量级级别。^(210)Pb活度浓度与采样期间PM_(2.5)、PM_(10)、NO_(2)、AQI、SO_(2)、CO浓度显著正相关,与O;浓度显著负相关。通过多元线性回归研究发现,^(210)Pb活度浓度同时与PM_(2.5)和NO_(2)浓度这两个因素正相关。

A total of 93 batches of aerosol samples were collected from Wuhan,Huangshi,Xiangyang and Yichang in Hubei Province from 2018 to 2020 and tested forγspectrum analysis via an energy spectrum of high purity germanium (Wide Energy HPGE BE6530).The monitoring results showed that the highest activity concentration of^(210)Pb was 5.15 mBq/m~3.In comparison,the lowest was 0.308 m Bq/m~3in four cities,with a meaning level of 1.668 mBq/m~3.The annual effective dose of^(210)Pb inhalation for the public was (7.7E-07~3.0E-05)Sv,in which 10;was the highest concentration level.The activity concentration of^(210)Pb had a significant positive correlation with the concentrations of PM_(2.5),PM_(10),NO_(2),AQI,SO_(2),and CO,but a negative correlation with O;concentration.According to multiple linear regression,the activity concentration of^(210)Pb had a positive correlation with the synchronous concentration of PM_(2.5)and NO_(2).