Huang Qi, Xu Min, Zhu Yingying, Li Xin, Xu Jiadong, Li Xiaojian, Lu Ying
School of Life Science, Taizhou University, 318000, Taizhou, China.
Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Science, Taizhou University, 318000, Taizhou, China.
Sci Rep. 2025 Mar 31;15(1):10981. doi: 10.1038/s41598-025-93715-w.
This study evaluates the impact of vehicular emissions on polycyclic aromatic hydrocarbons (PAHs) in roadside soils in Shanghai during the COVID-19 lockdown period. Soil samples from roadside lawns were collected, with PAH concentrations ranging from 153 to 5639 ng g. A significant reduction in PAH levels compared to their pre-COVID-19 levels (Kruskal-Wallis H test, p < 0.05) was observed in surface soil samples, highlighting the contribution of traffic and coal combustion to urban pollution. Source identification, using molecular diagnostic ratios and principal component analysis, revealed that vehicular emissions were the primary contributors to PAHs in Shanghai's roadside soils. The toxic equivalent quantity for benzo[a]pyrene concentrations in the soil samples was associated with these sources. The incremental lifetime cancer risk model indicated that adult exposure to PAHs in the soil posed health risks greater than 10 but lower than 10, suggesting a low-risk level. These findings suggest that targeted measures in the transportation sector could improve urban soil quality and reduce associated health risks.
本研究评估了新冠疫情封锁期间，车辆排放对上海路边土壤中多环芳烃（PAHs）的影响。采集了路边草坪的土壤样本，PAH浓度范围为153至5639纳克/克。在表层土壤样本中观察到，与新冠疫情前的水平相比，PAH含量显著降低（Kruskal-Wallis H检验，p < 0.05），突出了交通和煤炭燃烧对城市污染的贡献。使用分子诊断比率和主成分分析进行源识别，结果显示车辆排放是上海路边土壤中PAHs的主要来源。土壤样本中苯并[a]芘浓度的毒性当量与这些来源相关。增量终生癌症风险模型表明，成年人接触土壤中的PAHs会带来大于10但低于10的健康风险，表明风险水平较低。这些研究结果表明，交通运输部门采取针对性措施可以改善城市土壤质量并降低相关健康风险。
