College of Natural Resources and Environment, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, PR China.
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling, Xianyang, 712100, Shaanxi, PR China.
Bull Environ Contam Toxicol. 2020 Sep;105(3):446-452. doi: 10.1007/s00128-020-02982-y. Epub 2020 Sep 7.
Increasing contamination of urban soil by persistent organic pollutants is a major environmental issue. The purpose of the present study was to investigate the distribution, source and human health risk of polycyclic aromatic hydrocarbons (PAHs) in different functional areas in Zhengzhou City, China. Total 130 soil samples were collected from surface layer (0-10 cm) in urban road, overpass, residential area and park in the city during January 2019. Concentrations of ∑PAH in the urban soil ranged from 49.90 to 11,565 µg kg and seven carcinogenic PAHs accounted for 69% of the total PAHs. The mean concentrations of PAHs decreased in the following order: urban road > overpass > residential area > park. Analysis based on diagnostic rate demonstrated that PAHs mainly originated from pyrolysis sources including traffic emissions and combustion of coal and biomass. Health risk assessment indicated that PAHs in urban road in the city have potential carcinogenic risks to residents. The present study suggested that the control of urban PAHs pollution in Zhengzhou City should be strengthened.
城市土壤中持久性有机污染物的污染不断增加是一个主要的环境问题。本研究旨在调查中国郑州市不同功能区多环芳烃（PAHs）的分布、来源和对人体健康的风险。2019 年 1 月，在城市道路、立交桥、居民区和公园的表层（0-10cm）采集了 130 个土壤样本。城市土壤中∑PAH 的浓度范围为 49.90 至 11565μgkg，其中 7 种致癌 PAHs 占总 PAHs 的 69%。PAHs 的平均浓度按以下顺序降低：城市道路>立交桥>居民区>公园。基于诊断率的分析表明，PAHs 主要来源于包括交通排放和煤及生物质燃烧在内的热解源。健康风险评估表明，该城市道路 PAHs 对居民具有潜在的致癌风险。本研究表明，应加强郑州市城市 PAHs 污染的控制。
