Characteristics，Risk Assessment，and Sources of the Polluted Metallic Elements in PM2.5 During Winter in Liaocheng City

被引：0

作者：

Zhang J.-Q. ^{[1
]}

Zhu Y. ^{[1
]}

Cao T. ^{[1
]}

Yan L. ^{[2
]}

Wang S.-L. ^{[1
]}

Liu Z. ^{[1
]}

机构：

[1] Chinese Research Academy of Environmental Sciences, Beijing

[2] Chinese Academy of Environmental Planning, Beijing

来源：

Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 04期

关键词：

geo-accumulation index; metallic element; PM[!sub]2. 5[!/sub; risk assessment; source apportionment;

D O I：

10.13227/j.hjkx.202304217

中图分类号：

学科分类号：

摘要：

In order to study the pollution characteristics，risk assessment，and sources of the metallic elements in ambient PM2. 5 during winter in Liaocheng City，PM2. 5 measurements was conducted daily for two consecutive years in January 2018 and 2019. The results showed that the average PM2. 5 and metallic element concentrations were（87. 7 ± 39. 9）µg·m-3 and（6. 92 ± 2. 91）µg·m−3，respectively，during the sampling period in winter in Liaocheng City. The concentrations of Ca and Al，1. 97 µg·m−3 and 1. 35 µg·m−3，respectively，were highest，and the concentrations of other elements were relatively low. Additionally，the concentrations of Ca，Al，Fe，and Ti decreased on polluted days compared with those on clean days，whereas the concentrations of other elements increased. The results of the ground accumulation index（Igeo）showed that the Igeo of Cd，Zn，Pb，Sn，and Cu were all higher than 2. 5，which was above the heavy pollution level，and the Igeo of other elements were less than 1，which belonged to the degree of light pollution or no pollution. The potential ecological risk assessment results showed that the RI index of metallic elements was 10 114. 2，and the potential harm was strong. The Er of Cd was 9 802. 2 with a contribution of 96. 9%，followed by Pb，As，and Cu；thus，Cd was the key factor of the potential ecological risk of metallic elements，and it was higher on clean days. For population health risk assessment，the combined effects of nine elements，namely Mn，Cr，Pb，Ni，As，Co，Cd，V，and Ba，had certain non-carcinogenic risks and carcinogenic risks. The highest carcinogenic risk element was As，with an R value of 1. 16 × 10−5，followed by Cr（Ⅵ）. The potential ecological，non-carcinogenic，and carcinogenic risks on polluted days were higher than those on clean days of related elements. The results of enrichment factor and principal component analysis showed that the enrichment degree of the Cd，Pb，Zn，and Sn elements were significant，and the enrichment factors of other elements increased to some extent on polluted days，except for Ca. The main sources of metallic elements included traffic sources，combustion sources，dust sources，and coal combustion sources，with contributions of 37. 5%，22. 5%，17. 5%，and 7. 2%，respectively. As a whole，the metallic elements of PM2. 5 were greatly affected by human sources in Liaocheng City in winter，among which traffic sources and combustion sources were the key control sources. © 2024 Science Press. All rights reserved.

引用

页码：2003 / 2010

页数：7

共 48 条

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