Effects of Chemical Composition of PM2.5 on Visibility in a Semi-rural City ofSichuan Basin
Li, YC(Li, Yunchun)1,2; Shu,M(Shu,Man)1; Ho, Steven Sai Hang3; Yu,JZ(Yu,Jianzhen)4; Yuan, ZB(Yuan, Zibing)4; Liu, ZF(Liu,Zifang)5; Wang, XX(Wang,Xianxiang)1; Zhao,XQ(Zhang,Xiaoqing)1; Li, Yunchun
2018-04
发表期刊Aerosol and Air Quality Research
卷号18期号:4页码:957-968
文章类型期刊论文
摘要The rate of visibility deterioration in Ya'an city in the Sichuan Basin has been accelerating since the 2000s. Issues related to the air quality as well as meteorological conditions are reported in this study. Fine particulate matters (PM2.5) were collected in Ya'an from June 2013 till June 2014. The chemical compositions of the samples were determined. The annual average visual range (VR), PM2.5 concentrations, and ambient light extinction coefficient (b(ext)) were 11.9 +/- 9.2 km, 64.1 +/- 41.6 mu g m(-3), and 452 +/- 314 Mm(-1), respectively. The highest concentration of PM2.5, the highest b(ext), and the lowest VR were all seen in winter, followed by spring, autumn, and summer. Organic matter (OM), ammonium sulfate [(NH4)(2)SO4], and ammonium nitrate [NH4NO3] were the major constituents, accounting for 32.8%, 28.3%, and 12.1%, respectively, of the total PM2.5 mass. The revised Interagency Monitoring of Protected Visual Environments (IMPROVE) equation was applied to estimate ambient b(ext). On an annual basis, (NH4)(2)SO4 was the most significant contributor (43.1%), followed by OM (27.1%) and NH4NO3 (22.4%), which, in total, accounted for 92.6% of the ambient b(ext). Rayleigh, elemental carbon, fine soil, nitrogen dioxide, and chloride salt accounted for a minor fraction (7.4%). Up to similar to 40.8% of the ambient b(ext) was ascribed to relative humidity (RH), of which 26.4% and 14.0% were attributed to the hygroscopic growth of (NH4)(2)SO4 and NH4NO3, respectively. More efforts are needed to reduce the average daily PM2.5 concentration of < 59 mu g m(-3) to avoid the occurrence of haze under a high average RH of 78.3 +/- 10%, which significantly impacts visibility through various physicochemical processes. Emissions of precursor gases, such as sulfur dioxide, nitrogen oxides, ammonia, and volatile organic compounds, should be reduced to improve the air quality and visibility in Ya'an.
关键词Fine Particulate Matter Visibility Light Extinction Coefficient Chemical Composition
DOI10.4209/aaqr.2017.08.0264
收录类别SCI
所属项目编号41205095 ; KHK1407
语种英语
项目资助者National Natural ScienceFoundation of China ; National Natural ScienceFoundation of China ; foundation of JiangsuKey Laboratory of Atmospheric Environment Monitoringand Pollution Control ; foundation of JiangsuKey Laboratory of Atmospheric Environment Monitoringand Pollution Control
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5269
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Li, Yunchun
作者单位1.College of Science, Sichuan Agricultural University, Ya’an 625014, China
2.Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School ofEnvironmental Sciences and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044,China
3.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese academy of Sciences, Xi’an 710075,China
4.Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
5.Ya’an Environmental Monitoring Center, Ya’an 625014, China
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Li, YC,Shu,M,Ho, Steven Sai Hang,et al. Effects of Chemical Composition of PM2.5 on Visibility in a Semi-rural City ofSichuan Basin[J]. Aerosol and Air Quality Research,2018,18(4):957-968.
APA Li, YC.,Shu,M.,Ho, Steven Sai Hang.,Yu,JZ.,Yuan, ZB.,...&Li, Yunchun.(2018).Effects of Chemical Composition of PM2.5 on Visibility in a Semi-rural City ofSichuan Basin.Aerosol and Air Quality Research,18(4),957-968.
MLA Li, YC,et al."Effects of Chemical Composition of PM2.5 on Visibility in a Semi-rural City ofSichuan Basin".Aerosol and Air Quality Research 18.4(2018):957-968.
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