大气汞均相和非均相化学反应过程研究进展

被引:18
作者
童银栋 [1 ]
张巍 [2 ]
邓春燕 [3 ]
陈龙 [3 ]
王欢欢 [3 ]
王学军 [3 ]
James Jay Schauer [4 ]
机构
[1] 天津大学环境科学与工程学院室内空气环境质量控制天津市重点实验室
[2] 中国人民大学环境学院
[3] 北京大学城市与环境学院地表过程分析与模拟教育部重点实验室
[4] University of Wisconsin-Madison,Environmental Chemistry and Technology Program
基金
国家自然科学基金重点项目;
关键词
大气汞; 均相; 非均相; 氧化还原反应; 界面分配;
D O I
10.13671/j.hjkxxb.2015.0716
中图分类号
X51 [大气污染及其防治];
学科分类号
083001 [环境科学];
摘要
作为环境中汞传输的最重要通道,大气在汞的全球生物地球化学循环和传输扩散中起着极其关键的作用.大气环境成分复杂,汞在随大气环境传递过程中会经历复杂的化学反应,并导致不同形态之间相互转化,这也成为影响大气汞远距离传输尺度的关键因素.本文主要对大气汞在不同相界面之间的分配过程和主要影响因素(包括相界面的物理化学性质和外部环境条件等)进行了总结;对大气Hg0主要氧化反应过程(卤族元素氧化和O3、OH·氧化)进行了阐述;对大气Hg2+还原反应过程,尤其是光致还原反应等进行了梳理.如何综合运用野外监测分析和室内模拟等,利用微观分子表面分析等新技术明确大气汞均相、非均相反应过程,并将反应机理与大气汞传输过程模拟系统融合,将是未来大气汞研究的重要内容之一.
引用
收藏
页码:1515 / 1523
页数:9
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