期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 723, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.137951
关键词
Atmospheric reactivity; Molecular iodine; Heterogeneous reactivity; Photolysis; Kinetics; Silica particles
资金
- Institut de Radioprotection et de Surete Nucleaire (IRSN)
- Region Sud
A molecular derivatization method followed by gas chromatographic separation coupled with mass spectrometric detection was used to study photolytic degradation of I-2 adsorbed on solid SiO2 particles. This heterogeneous photodegradation of I-2 is studied at ambient temperature in synthetic air to better understand I-2 atmospheric dispersion and environmental fate. The obtained laboratory results show a considerably enhanced atmospheric lifetime of molecular iodine adsorbed on solid media. The heterogeneous atmospheric residence time (tau) of I-2 is calculated to be tau approximate to 187 min, i.e., tau approximate to 3 h. The obtained heterogeneous lifetime of I-2 is shown to be considerably longer than its destruction by its principal atmospheric sink, namely, photolysis. The observed enhanced atmospheric lifetime of I-2 on heterogeneous media will likely have direct consequences on the atmospheric transport of I-2 that influences the toxicity or the oxidative capacity of the atmosphere. (C) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据