Abstract：Objective To investigate the characteristics of fine particular matter (PM2.5) air pollution and their effects on people’s health in Yichang City. Methods Atmospheric PM2.5 samples were collected in Xiling District and Wujiagang District using a sampler of medium-flow capacity. The weighing method was employed to analyze the mass concentration of PM2.5. 16 kinds of polycyclic aromatic hydrocarbons (PAHs) bound to PM2.5 were analyzed by gas chromatography-mass spectrometer (GC-MS), and 12 kinds of heavy metals were determined by inductively coupled plasma mass spectrometry (ICP-MS). Results Atmospheric PM2.5 concentration in Xiling District and Wujiagang District ranged from 12.4 μg/m3 to 219 μg/m3 and from 10.4 μg/m3 to 218 μg/m3 respectively, with the average concentration of 74.0 μg/m3 and 77.2μg/m3 respectively. The total concentration of PAHs in the PM2.5 samples was in the ranges of 0-74.8 ng/m3 and 0-79.8 ng/m3 respectively, with the average concentration of 20.2 ng/m3 and 19.1 ng/m3 respectively. The total values of total toxicity equivalent conocentration were 2.75 ng/m3 and 2.64 ng/m respectively, and the values of incremental lifetime cancer risk (ILCR) in the two monitoring districts were 7.74×10-5 and 7.44×10-5 respectively, which were all slightly higher than the negligible threshold (ILCR=10-6) provided by United States Environmental Protection Agency (USEPA). The concentration of lead in the two monitoring districts was 8.8-112.0 ng/m3 and 4.4-120.0 ng/m3 respectively, and its non-carcinogenic risk was 0.219 and 0.207 respectively. The concentration of cadmium was 0.2-4.8 ng/m3 and 0.1-5.4 ng/m3 respectively, with the non-carcinogenic risk of 1.03×10-2 and 8.55×10-3 respectively and the incremental lifetime cancer risk of 4.26×10-8 and 3.55×10-8 respectively. These values were all lower than the negligible thresholds provided by USEPA (non-carcinogenic risk<1, ILCR<10-6). Conclusions PM2.5 air pollution in Xiling District and Wujiagang District in Yichang City has certain health risk for human body; and hence, it is necessary to control the pollutant discharge so as to reduce the potential health risk.
杨财平, 马蓓蓓, 余青, 万正杨. 宜昌市PM2.5的污染特征及其风险评价[J]. 实用预防医学, 2017, 24(10): 1209-1212.
YANG Cai-ping, MA Bei-bei, YU Qing, WAN Zheng-yang. Characteristics of PM2.5 pollution and its risk assessment in Yichang City. , 2017, 24(10): 1209-1212.
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2017, Vol. 24 
