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| Ecological toxicity of polycyclic aromatic hydrocarbon fraction of total petroleum hydrocarbons |
| Received:September 06, 2024 |
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| KeyWord:total petroleum hydrocarbon (TPH);equivalent polycyclic aromatic hydrocarbons (PAHs);toxicological effect;ecological receptor;multifunctionality |
| Author Name | Affiliation | E-mail | | TANG Shiwei | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Shaanxi Key Laboratory of Environmental Engineering, Xi' an 710055, China
Key Laboratory of Northwest Water Resource, Environment and Ecology, Xi'an 710055, China | | | WU Manli | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Shaanxi Key Laboratory of Environmental Engineering, Xi' an 710055, China
Key Laboratory of Northwest Water Resource, Environment and Ecology, Xi'an 710055, China | 447005853@qq.com | | YU Ying | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Shaanxi Key Laboratory of Environmental Engineering, Xi' an 710055, China
Key Laboratory of Northwest Water Resource, Environment and Ecology, Xi'an 710055, China | | | LI Qian | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Shaanxi Key Laboratory of Environmental Engineering, Xi' an 710055, China
Key Laboratory of Northwest Water Resource, Environment and Ecology, Xi'an 710055, China | | | GOU Nana | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Shaanxi Key Laboratory of Environmental Engineering, Xi' an 710055, China
Key Laboratory of Northwest Water Resource, Environment and Ecology, Xi'an 710055, China | | | KE Sijia | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Shaanxi Key Laboratory of Environmental Engineering, Xi' an 710055, China
Key Laboratory of Northwest Water Resource, Environment and Ecology, Xi'an 710055, China | | | HU Siyi | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Shaanxi Key Laboratory of Environmental Engineering, Xi' an 710055, China
Key Laboratory of Northwest Water Resource, Environment and Ecology, Xi'an 710055, China | |
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| Abstract: |
| In order to investigate the toxicological effects of polycyclic aromatic hydrocarbons（PAHs） components in petroleumcontaminated soil on soil ecosystems, this study selected microorganisms, maize, and earthworms as ecological receptors. The ecotoxicity of 16 PAHs（2.47 mg·kg-1）, low molecular weight PAHs（L-PAH, 0.40 mg·kg-1）, and high molecular weight PAHs（H-PAH, 2.07 mg·kg-1） in soil contaminated with a total petroleum hydrocarbon（TPH）concentration of 13 g·kg-1 was assessed using flow cytometry and toxicological methods. Additionally, the partial least-square method（PLS）was employed to explore the toxicity pathways of PAHs on different ecological receptors. The results showed that the multifunctionality of soil contaminated with L-PAH, H-PAH, and 16 PAHs was 0.68, 0.45, and 0.23, respectively. Compared with clean soil（soil multifunctionality of 0.54）, H-PAH and 16 PAHs pollution respectively reduced the multifunctionality of soil by 16.67% and 57.41%, and L-PAH enhanced the multifunctionality by 25.92%. The 16 PAHs component pollution was the main reason for the decrease in multifunctionality in 13 g·kg-1 oil-contaminated soil. The biomarker response index（BRI）of earthworms in soil contaminated with 16 PAHs, H-PAH, and L-PAH was 2.44, 2.69, and 2.38, respectively. L-PAH and 16 PAHs stress had a more significant damaging effect on earthworms. Each equivalent PAH components exhibited strong toxic effects on the activities of soil polyphenol oxidase（S-PPO）, lipase（S-LPS）, peroxidase（S-POD）, and urease（S-UE）in soil, but the toxic effect of PAHs on maize growth was not significant. The PLS results indicated that PAH pollutants affect the activity and survival of earthworms in soil by affecting soil physicochemical properties and microbial activity, which in turn affects the survival of earthworms in the soil. |
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