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. 2022 Dec 12;12(1):21448.
doi: 10.1038/s41598-022-25879-8.

Levels, sources, and risk assessment of PAHs residues in soil and plants in urban parks of Northwest China

Nuerla Ailijiang #  1   2 , Naifu Zhong #  3   4 , Xiaolong Zhou  5 , Anwar Mamat  6 , Jiali Chang  7 , Shuangyu Cao  5 , Zhenyu Hua  5 , Nanxin Li  3   4
Affiliations

Levels, sources, and risk assessment of PAHs residues in soil and plants in urban parks of Northwest China

Nuerla Ailijiang et al. Sci Rep. .

Abstract

Polycyclic aromatic hydrocarbons (PAHs) will be ingested by people through different ways to threaten their health during play, so the environmental quality of the park directly affects the health of tourists and residents. Using eight typical parks in Urumqi in Northwest China as the study area, we used GC-MS to detect the PAHs content in the park surface soil and 10 common plants in the park in different seasons. The results showed that the content of PAHs in park soil in the summer was 5-6 times that in the winter, and the monomer PAHs in some park soil sampling points were higher than the soil pollution risk screening value. And the contamination level at these sampling sites was also higher compared to other sampling sites. In summer, the plants with high PAHs content in leaves are short herbs, while in winter, they are tall arbors. The PAHs of the park soil are mainly composed of high-cyclic aromatic hydrocarbons, and are mainly of traffic origin. The proportion of low-ring aromatic hydrocarbons in the winter was significantly higher than that in the summer. The source of PAHs in plants in summer is similar to that in soil, but the source of PAHs in plants in winter is more complex. The toxicity equivalent concentration method values of soil PAHs in South Park, Zhiwu Park, Shihua Park and Toutunhe Park were higher than that in other parks. The lifetime carcinogenic risk (ILCRs) values of some sampling points in these four parks in the summer were relatively high. The average ILCRs of adults and children in all parks reached a low-risk level in summer. The carcinogenic risk in children is much higher than that of adults.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Total concentration distribution of PAHs in park soil and plants.
Figure 2
Figure 2
Single component of PAHs in soil and plants and the proportion of different ring numbers.
Figure 3
Figure 3
Source analysis of soil PAHs.
Figure 4
Figure 4
Source analysis of plant PAHs.
Figure 5
Figure 5
ILCRs value of PAHs in park soil.
Figure 6
Figure 6
NIPI value of PAHs in park soil.
Figure 7
Figure 7
Map of sampling sites in parks in Urumqiy (The ArcGIS 10.8 was used to create the geographic map of the study area, URL: http://36.112.130.153:7777/DSSPlatform/index.html).
See this image and copyright information in PMC

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