Characterization of Metal Pollution of Regional Atmospheric PM2.5 and Its Sources Based on the PMF Model

被引：1

作者：

Deng L.-L. ^{[1
]}

Zhang K.-S. ^{[1
]}

Yin Z.-Y. ^{[1
]}

Li X.-Y. ^{[1
]}

Wu W.-Q. ^{[1
]}

Xiang X.-P. ^{[1
]}

机构：

[1] College of Architecture and Environment, Sichuan University, Chengdu

来源：

Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 12期

关键词：

Haze; Metal elements; PM[!sub]2.5[!/sub; Positive matrix factorization (PMF); Source apportionment;

D O I：

10.13227/j.hjkx.202004275

中图分类号：

学科分类号：

摘要：

As important components of PM2.5, metal elements are extremely harmful to people and also have source specificity. Understanding the characteristics of PM2.5 metal pollution in the two different types of cities can help adjust the layout of regional industrial structure and improve the environment. PM2.5 samples during haze/non-haze periods were collected in Chengdu City and Renshou County. Inductively coupled plasma optical emission spectrometry (ICP-OES) was used to determine the mass concentrations of eighteen metal elements in collected PM2.5 samples. The positive matrix factorization (PMF) model was used for source apportionment analysis for metal elements in PM2.5. The analysis showed that the ratio of trace elements from fugitive dust, motor vehicle emissions, and coal burning to the total elements is greater in Chengdu City than that in Renshou County. The proportion of trace elements from biomass combustion, industrial, and fuel sources in Renshou County is higher than that in Chengdu City. In addition, concentrations of Cd, As, and Cr in both areas exceeded the standards, indicating the occurrences of heavy metal pollution. During the haze period, the total concentrations of compositional metal elements in PM2.5 increased, although the rate was much lower than that for PM2.5. The ratios of elements between haze and non-haze periods ranged from 0.7 (Al) to 2.8 (Ba) in Chengdu City, and from 0.8 (Al) to 3.1 (Mn) in Renshou County. Among all metal elements, the increase rate for trace elements from coal burning and industrial activities was relatively large but small for those from fugitive dust, with the growth in trace elements from motor vehicles being modest. The results of this study indicated that the characteristics of pollution and source of metal elements in PM2.5 varied by economic scale, development mode, and industrial layout. In large cities such as Chengdu City, where economic development is mainly focused on tertiary industry, air pollution is mainly caused by transportation and urban construction, while in suburban area such as Renshou County, where secondary or heavy industry are the focus for economic development, the pollution is mainly affected by energy consumption and industrial production. © 2020, Science Press. All right reserved.

引用

页码：5276 / 5287

页数：11

共 54 条

[1] He H, Wang X M, Wang Y S, Et al., Formation mechanism and control strategies of haze in China, Bulletin of Chinese Academy of Sciences, 28, 3, pp. 344-352, (2013)
[2] Kfoury A, Ledoux F, Roche C, Et al., PM2.5 source apportionment in a French urban coastal site under steelworks emission influences using constrained non-negative matrix factorization receptor model, Journal of Environmental Sciences, 40, pp. 114-128, (2016)
[3] Qie G H, Wang Y, Wu C, Et al., Distribution and sources of particulate mercury and other trace elements in PM2.5 and PM10 atop Mount Tai, China, Journal of Environmental Management, 215, pp. 195-205, (2018)
[4] Zhang F Y, Li L P, Krafft T, Et al., Study on the association between ambient air pollution and daily cardiovascular and respiratory mortality in an urban district of Beijing, International Journal of Environmental Research and Public Health, 8, 6, pp. 2109-2123, (2011)
[5] Esposito S, Galeone C, Lelii M, Et al., Impact of air pollution on respiratory diseases in children with recurrent wheezing or asthma, BMC Pulmonary Medicine, 14, (2014)
[6] Visser S, Slowik J G, Furger M, Et al., Kerb and urban increment of highly time-resolved trace elements in PM10, PM2.5 and PM1.0 winter aerosol in London during ClearfLo 2012, Atmospheric Chemistry and Physics, 15, 5, pp. 2367-2386, (2015)
[7] (2018)
[8] Li M, Lian X W, Wang J, Et al., Pollution characteristics of metal components in PM2.5 in two districts of Guangzhou, Journal of Environmental & Occupational Medicine, 33, 7, pp. 650-656, (2016)
[9] (2018)
[10] (2017)

← 1 2 3 4 5 6 →