This study investigates the contamination characteristics of polychlorinated naphthalenes (PCNs) in the rice paddy soils of two indu+strial cities (Pohang and Ulsan) in South Korea. The paddy soils were collected from 40 sites in the paddy fields near industrial complexes in both cities. The mean concentration of Σ₅₅ PCNs was 145.9 ± 101.7 pg/g and 95.4 ± 41.4 pg/g for the soils in Pohang and Ulsan, respectively. The toxic equivalents (TEQs) of Σ₂₈ PCNs ranged from 0.007 pg-TEQ/g to 0.069 pg-TEQ/g in Pohang, and 0.015 pg-TEQ/g to 0.046 pg-TEQ/g in Ulsan. The PCN profiles were dominated by lower chlorinated homologues such as tetra- and tri-CNs for both cities, which are associated with the historical use of technical products, or more specifically, Halowaxes (HW 1099, 1031, 1013, and 1001). The results of the principal component analysis (PCA) indicate that the historical residues from the technical products contributed to the PCN contamination, but the influence of combustion sources was also observed with a high fraction of combustion-related congeners. Based on this study, we can expect that rice grown in these paddy fields will accumulate PCNs and other combustion-related pollutants, strongly suggesting the necessity for multimedia (e.g., air, soil, water, and rice) monitoring and human exposure assessments of PCNs.

这项研究调查了韩国两个工业城市（浦项和蔚山）的稻田土壤中多氯化萘（PCN）的污染特征。稻田土壤是从两个城市的工业园区附近的稻田中的40个地点采集的。的Σ的平均浓度₅₅的PCN分别为145.9±101.7皮克/克和95.4±41.4皮克/克在浦项和蔚山土壤。毒性当量（毒性当量）Σ的₂₈浦项的PCN范围从0.007 pg-TEQ / g到0.069 pg-TEQ / g，蔚山的PCN范围从0.015 pg-TEQ / g到0.046 pg-TEQ / g。PCN概况主要由较低的氯化物同系物（例如两个城市的四氯化萘和三氯化萘）主导，这与技术产品或更具体地讲，Halowaxes（HW 1099、1031、1013和1001）的历史使用相关。主成分分析（PCA）的结果表明，技术产品中的历史残留物造成了PCN污染，但在与燃烧有关的同类物质中，也观察到了燃烧源的影响。根据这项研究，我们可以预期在这些稻田中种植的水稻会积聚PCN和其他与燃烧有关的污染物，这强烈表明了多媒体的必要性（例如，空气，土壤，水，