The knowledge of PAH sources in soil plays an important role in making the decision of pollution emission restriction, as well as toxic information. The present study developed a modified receptor model to apportion the contribution of various sources to PAHs and associated toxic. PMF model was selected as the basic source apportionment model to identify sources and apportion their contributions. Toxic assessment models, including carcinogenicity assessment model and mutagenicity assessment model, were then used with PMF to obtain toxic-oriented source contribution. To attain this objective, 16 priority PAHs in the soil around Miyun Reservoir were selected as a case study. The results showed that the dominant source of soil PAHs was wood/biomass combustion (31.02%), followed by vehicular source (27.17%), petroleum source (21.27%) and coal combustion (20.53%). While the highest contributor to carcinogenicity and mutagenicity was a vehicular source, with a proportion of 36.61% and 41.46%, respectively. This study highlights the combined utilization of the source apportionment model and toxic assessment model. The approach was valuable for providing comprehensive source-oriented risk information, and expanding the application of both PMF and toxic assessment.

土壤中PAH来源的知识在决定污染排放限制以及有毒信息方面起着重要作用。本研究开发了一种改良的受体模型，以分摊各种来源对PAHs和相关毒性的贡献。选择PMF模型作为基本的源分配模型，以识别源并分配其贡献。然后将有毒的评估模型（包括致癌性评估模型和诱变性评估模型）与PMF结合使用，以获取有毒物质来源的贡献。为了实现这一目标，选择了密云水库周围土壤中的16种优先PAHs作为案例研究。结果表明，土壤多环芳烃的主要来源是木材/生物质燃烧（31.02％），其次是车辆来源（27.17％），石油来源（21）。27％）和燃煤（20.53％）。致癌性和致突变性的最大贡献者是车辆来源，分别占36.61％和41.46％。这项研究强调了源分配模型和毒性评估模型的结合利用。该方法对于提供全面的面向来源的风险信息，以及扩展PMF和毒性评估的应用非常有价值。