南京设施蔬菜基地土壤中多环芳烃（PAHs）的污染特征、来源及健康风险评价

打开文本图片集

中图分类号：X82 文献标识码：A 文章编号： 1000-4440（2025）07-1438-10

Pollution characteristics， sources and health risk assessment of polycyclic aromatic hydrocarbons （PAHs） in soil of facility vegetable bases in Nanjing

SUN Jialan1，2， DONG Cheng1，2， SHENG Hongjie² ZHANG Leigang²， CHEN Xiaolong²

YU Xiangyang²， GE Jing1，2

Academy ofAgricultural Sciences，Nanjing 21014， China）

Abstract：Thisstudy focused on thesoil from four facilityvegetablebases（D1-D4）in Luhe District，Nanjing City， collecting atotal of156 surface soil samples.The gas chromatography-mass spectrometry（GC-MS）method was employed to determinethecontentsof16polycyclicaromatic hydrocarbons（PAHs）.Theresultsshowedthatthecontentsof16polycyclicaromatichydrocarbons（PAHs）inthesoilsofD1，D2，D3 and D4 facility vegetable bases ranged from 82.82μg/kg to 145.90μg/kg ！ 106.08μg/kg to 182.63μg/kg ，70.58 μg/↕g to 119.27μg/kg and 189.88μg/kg to 423.29 ，respectively. The mean values were 106.59μg/kg ， 143.21μg/kg ， 92.69μg/kg ，and 289.30μg/kg ，respectively.The median values were 111.71 μg/kg ，135.16μg/kg ，88.19 ，and 296.36μg/kg ，respectively. The sources of PAHs in the four facility vegetable sites were generallysimilar，with motorvehicleexhaust emissionsand petroleumbeing the main sources ofPAHs.Risk assessment basedonlifetimecarcinogenicriskvaluesrevealedthatPAHsinD1，D2，andD3soilsposednegligiblecarcinogenicrisks，whilethose in D4 soil wereatalow-risk level.Riskasessmentresultsbasedontoxicequivalentconcentrations indicatedthatthemean values of toxic equivalent concentrations of 16 PAHs （ TEQBaP16 ）ranged from 1.421μg/kg to 16.281 μg/kg ，while the mean values for seven carcinogenic PAHs （ TEQBaP7 ）ranged from 1.243μg/kg to 15.883μg/kg .This suggested that the seven carcinogenicPAHswere theprimarycontributors tosoilcarcinogenicrisk inthestudyarea，withBaPintheD4siteshowing the highest contribution rate （ 75.893% ）.Theresults of this study can provide a scientific reference for relevant authorities in Nanjing to prevent and control PAH contamination in soils of facility vegetable bases.

KeyWords：soil；polycyclic aromatic hydrocarbons（PAHs）；polution characteristics；risk assessment

设施蔬菜产业是现代农业发展的重要组成部分，为蔬菜周年供应提供了保障，然而，由于其种植密度大、复种指数高、频繁灌溉施肥以及周边工业排污等问题，使得设施蔬菜基地土壤面临更加复杂的污染风险，其中，多环芳烃（PAHs）作为一类典型的持久性有机污染物在蔬菜产地土壤中被频繁检出[1-2]，该类化合物具有致癌、致畸和致突变作用[3]。（剩余15395字）