Abstract：Objective To investigate the associations between atmospheric PM2.5 and mass concentrations of lead(Pb),aluminum(Al),cadmium(Cd)and arsenic(As)in a primary school in Guangzhou City in 2015. Methods The 15-meter-high roof of a primary school in the urban area of Guangzhou City was selected as the sampling site. Atmospheric PM2.5 was collected with quartz fiber filters and glass fiber filters for 24 hours per day and weighted from 10th to 16th every month in 2015.The mass concentrations of Pb,Al,Cd and As were detected with inductively coupled plasma mass spectrometry (ICP-MS), and the relationships between the atmospheric PM2.5 and mass concentrations of the above-mentioned heavy metals were analyzed. Results The average concentration of atmospheric PM2.5 in the primary school in 2015 was (69.0±40.6)μg/m3. The descending order of the average mass concentrations of the four heavy metals was Al ((156.53±73.78)ng/m3) > Pb ((59.05±43.47)ng/m3) > As ((10.13±7.03)ng/m3) > Cd ((1.75±1.31)ng/m3). The peak concentrations of PM2.5 ((154.4±50.7)μg/m3), As ((17.82±12.60)ng/m3), Cd ((3.58±1.85)ng/m3) and Al ((237.13±93.33)ng/m3) all appeared in February, while the peak concentration of Pb ((129.13±53.65)ng/m3) occurred in January. There were positive correlations between the concentration of PM2.5 and mass concentrations of Pb, Al, Cd and As (r=0.6091, r=0.5880, r=0.6380, r=0.4646, P<0.05). The univariable linear regression model and the multivariable linear regression model showed that the mass concentrations of Pb, Al, Cd and As were closely related to the concentration of atmospheric PM2.5 (P<0.05). Conclusions The annual average concentration of PM2.5 in the primary school in Guangzhou City in 2015 exceeded the limit of secondary standard for the second kind of regions in Ambient Air Quality Standard (GB 3095-2012). The mass concentrations of Pb, Al, Cd and As are closely associated with the concentration of atmospheric PM2.5.
施洁, 吕嘉韵, 杨轶戬, 蒋琴琴, 刘鹏达, 石同幸. 2015年广州市某小学内大气PM2.5与部分重金属元素质量浓度的关系[J]. 实用预防医学, 2017, 24(12): 1462-1465.
SHI Jie, LYU Jia-yun, YANG Yi-jian, JIANG Qin-qin, LIU Peng-da, SHI Tong-xing. Associations between atmospheric PM2.5 and mass concentrations of some heavy metals in a primary school in Guangzhou City, 2015. , 2017, 24(12): 1462-1465.
2017, Vol. 24 
