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

本项目涉及检查多环芳烃（PAHs）在空气-水（液体或冷冻）界面的行为，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进入雾滴的吸收，以及对雾滴依赖的多环芳烃在实际雾水样品中的分配进行量化。此外，还将研究吸附的多环芳烃的光化学反应作为温度、压力和表面类型的函数，并与光解气相损失进行比较。这一信息将有助于了解当气团遇到雾和冰冻表面（冰和雪）时多环芳烃在大气中的命运。该项目将培训一名来自代表性不足群体的本科生，并涉及一名来自传统黑人学院和大学（HBCU）机构的教员。此外，其他几名本科生也将参与这项研究。该项目将被纳入化学工程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，特别是来自路易斯安那州环境质量部门的决策者，考虑到路易斯安那州南部雾的优势，这一点很重要。此外，研究机构（路易斯安那州立大学农业与机械学院和科罗拉多州立大学）之间的合作也将得到促进。

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).