Collaborative Research: Refining and Testing Methods for Identifying and Quantifying Gaseous Oxidized Mercury in Air

合作研究：识别和量化空气中气态氧化汞的精炼和测试方法

• 批准号: 1324781
• 负责人: Seth Lyman
• 金额: $ 25.36万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1324781&HistoricalAwards=false
• 关键词: Collaborative; Research; Refining; Testing; Methods

This project is focused on improving the measurement methods for gaseous oxidized mercury (GOM) in the atmosphere. Development will continue on a simple, calibrated system for passive sampling of GOM followed by thermal desorption. Mass spectrometric analysis will be used to identify specific GOM compounds in the environment. A variety of collection and pre-concentration materials and configurations will be tested. A field-ready calibrator for oxidized mercury compounds will be built that will allow for routine verification of GOM measurements by Tekran and other measurement systems. Gaseous oxidized mercury compounds are easily converted to methyl mercury, the form of mercury that is of most concern for human and ecosystem health. These compounds are also of concern because they can become efficiently taken up by ecosystems. This project will improve our understanding of the chemistry and fate of mercury in the environment.

该项目的重点是改进大气中气态氧化汞（GOM）的测量方法。将继续开发一个简单的，校准的系统被动采样GOM其次是热解吸。质谱分析将用于识别环境中的特定GOM化合物。将测试各种收集和预浓缩材料和配置。将建立一个氧化汞化合物的现场校准器，以便对Tekran和其他测量系统的GOM测量值进行常规验证。气态氧化汞化合物很容易转化为甲基汞，而甲基汞是对人类和生态系统健康最为关切的汞的形式。这些化合物也令人担忧，因为它们可以被生态系统有效地吸收。该项目将提高我们对汞在环境中的化学性质和归宿的认识。