CAREER: Atmosphere/Snow/Ice Interactions: Photochemistry of Organic Pollutants in Arctic Snow and Ice

职业：大气/雪/冰相互作用：北极雪和冰中有机污染物的光化学

• 批准号: 0547435
• 负责人: Amanda Grannas
• 金额: $ 63.05万
• 依托单位: Villanova University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-03-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0547435&HistoricalAwards=false
• 关键词: CAREER; Atmosphere; Snow; Ice; Interactions

The goal of this CAREER project is to study the cycling and photochemistry of persistent organic pollutants in snow and ice. The research will concentrate on atmosphere-cryosphere interactions of organic pollutants and photochemical transformations of pollutants occurring in snow and ice. Laboratory and field studies will be conducted to probe photochemical processes that may degrade organic compounds, and to address the environmental impact of such processes. Irradiation experiments will be conducted in the laboratory to elucidate the degradation mechanisms and products. Both direct and indirect photochemical pathways will be studied, along with other variables such as wavelength, pH, temperature, and snow grain size. Photochemistry experiments will be conducted in the Arctic (Barrow, Alaska) to determine if the chemistry observed in the laboratory also occurs under natural conditions. Organic pollutants in air, snow and ice will be measured in the field in an effort to better understand air/snow/ice partitioning processes.This project will help to educate undergraduate and master's students (via participation in active laboratory and field research) and K-12 students and the general public (via outreach efforts). Curriculum development activities will be aimed at students in grades 9-12, particularly in urban school districts with high minority populations. The project will also involve outreach to native Alaskan Inupiat Eskimos in Barrow. The PI will mentor a post-doctoral researcher, with the goal of recruiting someone interested in continuing his or her career at a predominantly undergraduate institution. Efforts will be made to recruit underrepresented minorities into the research and outreach activities. Assessment of undergraduate research and the Grade 9-12 curriculum will also be performed.

这个职业项目的目标是研究雪和冰中持久性有机污染物的循环和光化学。 这项研究将集中于有机污染物在大气-冰冻圈之间的相互作用以及污染物在雪和冰中发生的光化学转化。 我们会进行实验室和实地研究，以探讨可能会使有机化合物降解的光化学过程，以及这些过程对环境的影响。 将在实验室进行辐照实验，以阐明降解机制和降解产物。 直接和间接的光化学途径将被研究，沿着与其他变量，如波长，pH值，温度和雪颗粒大小。 将在北极（阿拉斯加州的巴罗）进行光化学实验，以确定在实验室中观察到的化学反应是否也发生在自然条件下。 将在实地测量空气、雪和冰中的有机污染物，以更好地了解空气/雪/冰的分离过程，该项目将有助于教育本科生和硕士生（通过参与积极的实验室和实地研究）以及K-12学生和公众（通过外联工作）。 课程编制活动将针对9-12年级的学生，特别是少数民族人口较多的城市学区的学生。 该项目还将涉及到巴罗的阿拉斯加土著爱斯基摩人。 PI将指导一名博士后研究员，其目标是招募有兴趣在本科院校继续其职业生涯的人。 将努力招募代表性不足的少数群体参加研究和外联活动。 本科研究和9-12年级课程的评估也将进行。