Pollution Characteristics and Potential Ecological Risks of Heavy Metals in Road Dust in Beijing

被引：1

作者：

Hu Y.-Q. ^{[1
]}

Guo J.-H. ^{[1
]}

Zhang C. ^{[1
]}

Wang Z. ^{[1
]}

Yan X. ^{[1
]}

Yang D.-Y. ^{[1
]}

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

机构：

[1] Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology, Beijing Municipal Environmental Protection Monitoring Center, Beijing

来源：

Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 09期

关键词：

Enrichment factor; Heavy metal; Interannual variation; PM[!sub]10[!/sub] and PM[!sub]2.5[!/sub; Potential ecological risk; Road dust;

D O I：

10.13227/j.hjkx.201903094

中图分类号：

学科分类号：

摘要：

Based on the concentrations of 21 inorganic elements in particulate matter with diameters less than 10 μm (PM10) in 2004, and PM2.5 in 2004 and 2013 of representative road dust in Beijing, the pollution characteristics and potential ecological risks of heavy metals in this dust were analyzed and discussed. The results showed that the six main elements in road dust in Beijing were Si, Ca, Al, Fe, Mg, and K, and the proportions of the total content of the six elements in PM10 in 2004, PM2.5 in 2004, and PM2.5 in 2013 accounted for 96.51%, 96.42%, and 96.53% of the total content of all elements tested, respectively. The elemental enrichment level and the pollution degree and the potential ecological risk of heavy metal in road dust in Beijing in 2004 were PM2.5>PM10. Se, a characteristic element of coal dust, was highly enriched in PM2.5 in 2004, and Cd was high in PM10 and PM2.5 in 2004 with enrichment factors of 1024.03, 68.15, and 871.55, respectively. Co, Zn, Ca, and Cu were significantly enriched in PM10 and PM2.5 in 2004 with enrichment factors of 12.93, 12.33, 8.30, and 8.07 in PM10 and 17.41, 21.80, 12.83, and 19.73 in PM2.5, respectively; Na and Si were not enriched in the road dust. The pollution load index (PLI) of heavy metals was 3.95 in PM10 and 7.71 in PM2.5 in 2004. Owing to the implementation of dust, motor vehicles, and combustion source control measures in Beijing and the relocation of the Shougang corporation, the elemental enrichment level, pollution degree, and potential ecological risk of heavy metals in road dust PM2.5 in 2013 were significantly lower than those in 2004. The enrichment factors of Cd and Se in PM2.5 in 2013 decreased to 98.47 and 0.95, respectively; those of Cu, Ca, and Zn decreased to 11.90, 8.84, and 8.20, respectively; and PLI decreased to 2.56. The results showed that the total potential ecological risk of heavy metals in road dust in Beijing was extremely strong. Heavy metal Cd was the most significant pollution factor and the main potential ecological risk source; its potential ecological risk index (RI) contribution to the total RI of heavy metals was more than 85%. In 2004, the pollution degree of heavy metals in road dust of main roads was significantly higher than that for other road types. The pollution degree of heavy metals in PM10 was main road>expressway entrance to Beijing>secondary main road>ring road; that for PM2.5 was main road>ring road>expressway entrance to Beijing>secondary main road. For PM2.5 in 2013, however, the order was expressway entrance to Beijing>main road>ring road>secondary main road. The pollution degree of heavy metals in road dust of secondary main roads was significantly lower than that for other road types. In 2013, for road dust PM2.5 in Beijing, the correlation of heavy metals Ti, Zn, V, Cr, Cu, Pb, and Ni was significant owing mainly to traffic-related emissions. © 2019, Science Press. All right reserved.

引用

页码：3924 / 3934

页数：10

共 32 条

[1]

Wang Y., Peng L., Li L.J., Et al., Chemical compositions and sources apportionment of re-suspended dust in Jincheng, Environmental Science, 37, 1, pp. 82-87, (2016)

[2]

Cao J.J., Shen Z.X., Chow J.C., Et al., Winter and summer PM2.5 chemical compositions in fourteen Chinese cities, Journal of the Air & Waste Management Association, 62, 10, pp. 1214-1226, (2012)

[3]

Hu Y.Q., Wu X.D., Wang C., Et al., Testing of concentration and characteristics of particulate matters emitted from stationary combustion sources in Beijing, Environmental Science, 37, 5, pp. 1653-1661, (2016)

[4]

Lelieveld J., Evans J.S., Fnais M., Et al., The contribution of outdoor air pollution sources to premature mortality on a global scale, Nature, 525, 7569, pp. 367-371, (2015)

[5]

Li M.H., Fan L.C., Mao B., Et al., Short-term exposure to ambient fine particulate matter increases hospitalizations and mortality in COPD: a systematic review and meta-analysis, Chest, 149, 2, pp. 447-458, (2016)

[6]

Hu Y.Q., Ma Z.H., Feng Y.J., Et al., Emission characteristics of water-soluble ions in fumes of coal fired boilers in Beijing, Environmental Science, 36, 6, pp. 1966-1974, (2015)

[7]

Shen G.F., Xue M., Yuan S.Y., Et al., Chemical compositions and reconstructed light extinction coefficients of particulate matter in a mega-city in the western Yangtze River Delta, China, Atmospheric Environment, 83, pp. 14-20, (2014)

[8]

Zhao J.Q., Ji Y.Q., Zhang L., Et al., Characteristics and source apportionment of water-soluble inorganic ions in road dust PM2.5 during spring in Tianjin using the quadrat sampling method, Environmental Science, 39, 5, pp. 1994-1999, (2018)

[9]

Chen P.L., Wang T.J., Hu X., Et al., Chemical mass balance source apportionment of size-fractionated particulate matter in Nanjing, China, Aerosol and Air Quality Research, 15, 5, pp. 1855-1867, (2015)

[10]

Zhang W., Ji Y.Q., Zhang J., Et al., Study on the road dust source profile of PM2.5 in Liaoning Province typical cities, China Environmental Science, 38, 2, pp. 412-417, (2018)

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