Variation of airborne quartz in air of Beijing during the Asia-Pacific Economic Cooperation Economic Leaders' Meeting

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• 作者：Gang Li¹ ; ^{gangli@rcees.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Yingming Li¹ ; Hongxing Zhang² ; Honghua Li¹ ; Guanjun Gao¹ ; Qian Zhou¹ ; Yuan Gao¹ ; Wenjuan Li¹ ; Huizhong Sun¹ ; Xiaoke Wang² ; Qinghua Zhang¹ ; ³ ; ^{qhzhang@rcees.ac.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Air pollution ; Carcinogen ; Haze ; PM10 ; Quartz
• 刊名：Journal of Environmental Sciences
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：39
• 期：Complete
• 页码：62-68
• 全文大小：426 K

文摘

Quartz particles are a toxic component of airborne particulate matter (PM). Quartz concentrations were analyzed by X-ray diffraction in eighty-seven airborne PM samples collected from three locations in Beijing before, during, and after the Asia-Pacific Economic Cooperation (APEC) Leaders’ Meeting in 2014. The results showed that the mean concentrations of quartz in PM samples from the two urban sites were considerably higher than those from the rural site. The quartz concentrations in samples collected after the APEC meeting, when the pollution restriction lever was lifted, were higher than those in the samples collected before or during the APEC meeting. The quartz concentrations ranged from 0.97 to 13.2 μg/m³, which were among the highest values amid those reported from other countries. The highest quartz concentration exceeded the Californian Office of Environmental Health Hazard Assessment reference exposure level and was close to the occupational threshold limit values for occupational settings. Moreover, a correlation analysis showed that quartz concentrations were positively correlated with concentrations of pollution parameters PM₁₀, PM_2.5, SO₂ and NO_x, but were negatively correlated with O₃ concentration. The results suggest that the airborne quartz particles may potentially pose health risks to the general population of Beijing.