Alves Célia, Calvo Ana I, Marques Liliana, Castro Amaya, Nunes Teresa, Coz Esther, Fraile Roberto
Centre for Environment and Marine Studies, Department of Environment, University of Aveiro, 3810-193, Aveiro, Portugal,
Environ Sci Pollut Res Int. 2014 Nov;21(21):12390-402. doi: 10.1007/s11356-014-3168-1. Epub 2014 Jun 18.
An indoor/outdoor monitoring programme of PM10 was carried out in two sports venues (a fronton and a gymnasium). Levels always below 50 μg m(-3) were obtained in the fronton and outdoor air. Due to the climbing chalk and the constant process of resuspension, concentrations above 150 μg m(-3) were registered in the gymnasium. The chalk dust contributed to CO3 (2-) concentrations of 32 ± 9.4 μg m(-3) in this sports facility, which represented, on average, 18 % of the PM10 mass. Here, the carbonate levels were 128 times higher than those registered outdoors. Much lower concentrations, around 1 μg m(-3), were measured in the fronton. The chalk dust is also responsible for the high Mg(2+) concentrations in the gym (4.7 ± 0.89 μg m(-3)), unfolding a PM10 mass fraction of 2.7 %. Total carbon accounted for almost 30 % of PM10 in both indoor spaces. Aerosol size distributions were bimodal and revealed a clear dependence on physical activities and characteristics of the sports facilities. The use of climbing chalk in the gymnasium contributed significantly to the coarse mode. The average geometric mean diameter, geometric standard deviation and total number of coarse particles were 0.77 μm, 2.79 cm(-3) and 28 cm(-3), respectively.
在两个体育场馆（一个回力球场和一个体育馆）开展了PM10室内/室外监测项目。回力球场和室外空气中的PM10水平始终低于50微克/立方米。由于使用了攀岩粉以及持续的再悬浮过程，体育馆内的浓度超过了150微克/立方米。在该体育设施中，白垩粉尘导致碳酸根离子（CO3 2-）浓度达到32±9.4微克/立方米，平均占PM10质量的18%。此处的碳酸盐水平比室外测量值高128倍。在回力球场测得的浓度要低得多，约为1微克/立方米。白垩粉尘也是体育馆内镁离子（Mg2+）浓度较高（4.7±0.89微克/立方米）的原因，其在PM10中的质量分数为2.7%。在两个室内空间中，总碳几乎占PM10的30%。气溶胶粒径分布呈双峰，且明显依赖于体育活动和体育场馆的特点。体育馆中攀岩粉的使用对粗模态有显著贡献。粗颗粒的平均几何平均直径、几何标准差和总数分别为0.77微米、2.79立方厘米和28立方厘米。
