Distribution and source analysis of polycyclic aromatic hydrocarbons in indoor dust from Anhui Province, China
LI Fa-song1,2,3, HAN Cheng1, ZHOU Bao-hua1, XU Zhi-bing1, WANG Yu1, LIN Da-song4, PENG Yu-mei1, YAO Jing-bo1, JIN Tao-sheng2
1. College of Environmental Resources, Anqing Teachers College, Anqing 246011, China;
2. MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
3. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
4. Innovative Team of Monitoring and Precaution for Cropland Environment, Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, China
Indoor dust samples (n=24) were collected from 14 locations in Anhui province, and concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) were measured. The results showed that the sum concentrations of 16PAHs (ΣPAHs) in all the samples ranged from 0.52 to 89.3 μg/g, with a mean value of 20.7 μg/g. Five-ring PAH was the predominant PAH component in all samples, followed by 4-ring and 3-ring PAHs. PAHs with high-molecular weight (4~6rings) are the predominant PAHs in most samples, ranging from 60.5% to 97.0% in ΣPAHs. Relatively high percentages of PAHs with low-molecular weight (2~3rings) were detected in only 4samples. This indicates the significant contribution of vehicle (automobiles and ships) and high temperature combustion from chemical plant to PAHs emission in most locations. However, potential high PAHs emission from oil, fuel spills and low temperature combustion from coal or woods might present in Anqing, Wuhu, and Liu'an. Significant differences of ΣPAHs were observed in the indoor dust from urban public places, urban family housings, and rural family housings, following the order of urban public places> urban family housings> rural family housings. According to the diagnostic ratio analysis, PAHs in dust from the public places and urban family housings were derived from the mixed source, while PAHs in dust from rural family housings were mainly derived from the combustion sources. Furthermore, carcinogenic risk assessment of PAHs indicated that the BaPE values in urban family housings were slightly higher than those in rural family housings. Much higher BaPE values of the dust from the urban public places were calculated, which were two times higher than the BaPE values of the dust from the urban and rural family housings.
李法松, 韩铖, 周葆华, 徐志兵, 王瑜, 林大松, 彭玉美, 姚静波, 金陶胜. 安徽省室内降尘中多环芳烃分布及来源解析[J]. 中国环境科学, 2016, 36(2): 363-369.
LI Fa-song, HAN Cheng, ZHOU Bao-hua, XU Zhi-bing, WANG Yu, LIN Da-song, PENG Yu-mei, YAO Jing-bo, JIN Tao-sheng. Distribution and source analysis of polycyclic aromatic hydrocarbons in indoor dust from Anhui Province, China. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(2): 363-369.
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