Collaborative Research: Development of a Better Understanding of Ambient RM Chemistry, Reactions Forming, and Methods for Measurement

合作研究：更好地理解环境 RM 化学、反应形成和测量方法

• 批准号: 2043165
• 负责人: William Johnson
• 金额: $ 4.42万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-03-15 至 2024-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2043165&HistoricalAwards=false
• 关键词: Collaborative; Research; Development; Better; Understanding

This project focuses on the development of improved methods for measuring reactive mercury in the atmosphere. Controlled laboratory experiments will be conducted to test and develop new and better materials for detecting oxidized mercury. The project includes measurements of reactive mercury in the ambient atmosphere at a diverse group of sites with different atmospheric chemistry. Improving the ability to quantify the concentrations and chemistry of reactive mercury compounds is critical to developing strategies for mitigating their damaging impacts.This effort has three main objectives. These are to: (1) Develop a better understanding of the chemical reactions responsible for forming and transforming reactive mercury (RM) through laboratory experiments and field campaigns; (2) Test and develop new and better materials for oxidized mercury (Hg) detection, including the identification of desorbable, long-term collection, and short-term collection surfaces for better resolved measurements; and (3) Develop and test a method to estimate RM concentrations measured over the past 20 years using archived data. The work is critical for understanding the Hg biogeochemical cycle and modeling atmospheric Hg processes and deposition, the two priority focus areas recently identified by the NADP’s Mercury in the Environment and Links to Deposition Science (MELD) Committee.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目的重点是改进测量大气中活性汞的方法。 将进行受控实验室实验，以测试和开发用于检测氧化汞的新的和更好的材料。 该项目包括在具有不同大气化学性质的不同地点测量环境大气中的活性汞。提高量化活性汞化合物的浓度和化学性质的能力，对于制定减轻其破坏性影响的战略至关重要。这些目标是：（1）通过实验室实验和实地活动，更好地了解形成和转化活性汞的化学反应;（2）测试和开发新的、更好的氧化汞检测材料，包括确定可解吸的、长期收集的和短期收集的表面，以便更好地进行测量;及（3）发展及测试一种方法，以利用存档数据估计过去20年所量度的RM浓度。这项工作对于理解汞的地球化学循环和模拟大气中的汞过程和沉积至关重要，这是NADP的汞在环境中的作用和与沉积科学的联系（MELD）委员会最近确定的两个优先重点领域。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Observations of the chemistry and concentrations of reactive Hg at locations with different ambient air chemistry

在不同环境空气化学成分的地点观察活性汞的化学成分和浓度

• DOI: 10.1016/j.scitotenv.2023.166184
• 发表时间: 2023
• 期刊: Science of The Total Environment
• 影响因子: 9.8
• 作者: Gustin, Mae Sexauer;Dunham-Cheatham, Sarrah M.;Allen, Natalie;Choma, Nicole;Johnson, William;Lopez, Sam;Russell, Armistead;Mei, Eric;Magand, Olivier;Dommergue, Aurélien
• 通讯作者: Dommergue, Aurélien