Receptor Models for the Evaluation of Fate and Transport of Organic Pollutants in the Aquatic Environment

0107402 Christensen本研究项目的目标是基于受体模型和相关方法确定有机污染物在水环境中的归宿和迁移。 重点是多氯联苯（PCBs）和多环芳烃（PAHs）的湖泊和河流的沉积物芯。 沉积物记录提供了一种方便的手段，不仅可以评价目前的状况，而且可以评价过去的物理/化学和生物退化趋势，以及不同来源的相对重要性。 数学方法包括因素分析模型，这种模型不依赖于预先存在的关于降解或来源概况的知识，以及化学质量平衡模型，在这种模型中，必须知道各种化合物的来源和相对数量或来源概况。 这两类污染物都对环境造成影响，可能存在于点源和非点源以及大气沉降物中。***

0107402 Christensen The objective of this research project is to determine the fate and transport of organic pollutants in the aquatic environment based on receptor models and related methodologies. The emphasis is on polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) in dated sediment cores from lakes and rivers. The sediment record offers a convenient means of evaluating not only the present situation but also past trends in physical/chemical and biological degradation, and the relative significance of the different sources. Mathematical methods include factor analysis models which do not depend on preexisting knowledge of degradation or source profiles, and chemical mass balance models in which sources and the relative amounts of various compounds or source profiles must be known. Both categories of pollutants are of concern to the environment and may be present both in point and non-point sources as well as in atmospheric fallout. ***