Li Jinying, Chen Yanan, Pan Dianqi, Zhang Jiquan, Zhang Yichen, Song Pengju, Shi Wanying
Changchun Institute of Technology, College of Jilin Emergency Management, Changchun 130012, China.
Institute of Natural Disaster Research, School of Environment, Northeast Normal University, Changchun 130024, China.
Toxics. 2025 Mar 27;13(4):249. doi: 10.3390/toxics13040249.
To investigate the levels of polychlorinated biphenyls (PCBs) in the black soils of Northeast China, we collected 59 surface soil samples from the central black soil region of Jilin Province. We analyzed the concentrations and sources of seven PCBs in the black soil, assessed the ecological risks associated with PCB contamination, and provided a risk assessment for PCBs in this soil type. The mean concentrations of the seven PCBs (PCB28, PCB52, PCB101, PCB118, PCB138, PCB153, and PCB180) were as follows: 1.61 μg/kg, 10.61 μg/kg, 0.37 μg/kg, 4.11 μg/kg, 0.70 μg/kg, 1.07 μg/kg, and 2.09 μg/kg, respectively. Principal component analysis revealed that PCB contamination in black soil is mainly attributed to automobile exhaust emissions during transportation, waste incineration processes, and insulation materials from electronic and electrical equipment. PCB28 and PCB52 are the primary causes of PCB danger, according to the findings of the ecological risk assessment, with Liaoyuan City having the highest risk. By applying contemporary industrial economic theory to analyze the annual accumulation of contaminants, we forecasted future PCB concentrations in black soil and issued a risk warning for these seven PCBs. Our results indicate that under the three scenarios considered, the presence of these seven PCBs in black soil does not pose a significant risk. However, given that our study examined only seven PCBs, the actual environmental risk may be underestimated.
为调查中国东北黑土中多氯联苯（PCBs）的含量水平，我们从吉林省中部黑土区采集了59个表层土壤样本。我们分析了黑土中7种多氯联苯的浓度及来源，评估了多氯联苯污染相关的生态风险，并对该土壤类型中的多氯联苯进行了风险评估。7种多氯联苯（PCB28、PCB52、PCB101、PCB118、PCB138、PCB153和PCB180）的平均浓度分别如下：1.61μg/kg、10.61μg/kg、0.37μg/kg、4.11μg/kg、0.70μg/kg、1.07μg/kg和2.09μg/kg。主成分分析表明，黑土中的多氯联苯污染主要归因于运输过程中的汽车尾气排放、垃圾焚烧过程以及电子电气设备的绝缘材料。根据生态风险评估结果，PCB28和PCB52是多氯联苯危害的主要成因，辽源市的风险最高。通过应用当代产业经济理论分析污染物的年度累积情况，我们预测了未来黑土中多氯联苯的浓度，并对这7种多氯联苯发布了风险预警。我们的结果表明，在所考虑的三种情景下，黑土中这7种多氯联苯的存在不会构成重大风险。然而，鉴于我们的研究仅检测了7种多氯联苯，实际环境风险可能被低估。
