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

大气中多环芳烃在空气-水界面（雾和冰）的吸附和光化学转化

• 批准号: 0355291
• 负责人: Kalliat Valsaraj
• 金额: $ 55.14万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-05-01 至 2008-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0355291&HistoricalAwards=false
• 关键词: Adsorption; Photochemical; Transformations; Polycyclic; Aromatic

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).

该项目涉及多环芳烃（PAHs）在空气-水（液体或冷冻）界面的行为的检查，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情况，以及对实际雾水样品中依赖于水滴的多环芳烃分配进行量化。 此外，吸附的多环芳烃的光化学反应将作为温度，压力和表面类型的函数进行研究，并通过光解气相损失进行比较。 这一信息将有助于了解大气中的多环芳烃命运的空气质量遇到雾和冻结的表面（冰和雪）。这个项目将培训一个本科生从一个代表性不足的群体，并涉及教师从一个历史上黑色的学院和大学（HBCU）机构。 此外，其他几名本科生也将参与这项研究。 该项目将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，特别是路易斯安那州环境质量部的政策制定者，考虑到路易斯安那州南部雾的优势，这一点很重要。 此外，将促进调查机构（路易斯安那州立大学农业和机械学院和科罗拉多州立大学）之间的合作。