Adsorption and Photochemical Transformations of Polycyclic Aromatic Hydrocarbons at the Air-Water Interface (Fog and Ice) in the Atmosphere

该项目涉及研究多环芳烃(PAHs)在空气-水(液体或冻结)界面上的行为，以解决一些问题。这些活动包括在实验室测量多环芳烃化合物在雾滴中的吸收，以及对实际雾水样本中依赖滴状的多环芳烃的分配进行量化。此外，还将研究吸附的多环芳烃的光化学反应随温度、压力和表面类型的变化，并与气相光解损失进行比较。这些信息将有助于理解当气团遇到雾和冰冻表面(冰和雪)时多环芳烃的大气命运。这个项目将培训一名来自代表性不足的群体的本科生，并涉及一名来自历史悠久的黑人学院和大学(HBCU)机构的教职员工。此外，其他几名本科生也将参与这项研究。该项目将被纳入化工系的两个高级研究班。这项工作的结果将与州和联邦政策制定者分享，特别是路易斯安那州环境质量部的政策制定者，鉴于路易斯安那州南部雾的优势，这一点很重要。此外，还将促进研究机构(路易斯安那州立大学和农业机械学院，以及科罗拉多州立大学)之间的合作。

This project involves examination of the behavior of polycyclic aromatic hydrocarbons (PAHs) at the air-water (liquid or frozen) interface to address a number of questions. The activities include measuring the uptake of PAH compounds into fog droplets in the laboratory, and quantification of drop-dependent PAH partitioning into actual fogwater samples. In addition, photochemical reactions of adsorbed PAHs will be studied as functions of temperature, pressure and surface type, and compared with gas-phase loss by photolysis. This information will be useful to understanding the atmospheric fate of PAHs as air masses encounter fog and frozen surfaces (ice and snow).This project will train an undergraduate student from an underrepresented group, and involve a faculty member from a Historically Black College and University (HBCU) institution. In addition, several other undergraduate students will be involved in the research. The project will be incorporated into two senior research classes in the Chemical Engineering Department. The results of this work will be shared with state and Federal policy makers, in particular those from the Louisiana Department of Environmental Quality, important given the preponderance of fog in southern Louisiana. In addition, collaboration will be fostered between the investigators' institutions (Louisiana State University & Agricultural and Mechanical College, and Colorado State University).