![Oxidation of elemental mercury by aqueous bromine: atmospheric implications [An article from: Atmospheric Environment]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR1DOS.jpg)
Oxidation of elemental mercury by aqueous bromine: atmospheric implications [An article from: Atmospheric Environment]
Book Details
Author(s)Z. Wang, S.O. Pehkonen
PublisherElsevier
ISBN / ASINB000RR1DOS
ISBN-13978B000RR1DO9
MarketplaceCanada 🇨🇦
Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The special characteristics of mercury, such as, its long-range atmospheric transport, its transformation between various species, biomagnification and its role as a neurotoxin, make it a pollutant of global concern. The chemical processes that take place in the atmosphere and water systems are closely linked and affect the transport of mercury. The kinetics of aqueous elemental mercury oxidation by aqueous bromine species detected by Dithizone-Hg(II) complexation-UV-VIS spectroscopy was extensively investigated in this study. The second-order oxidation rate constants at room temperature (294-296K) for the Hg"("a"q")^0-Br"2, Hg"("a"q")^0-HOBr and Hg"("a"q")^0-OBr^- are determined to be 0.20+/-0.03, 0.28+/-0.02 and 0.27+/-0.04M^-^1s^-^1, respectively. Such small oxidation rate constants also mean that the important atmospheric ''sink'' for mercury, which was discovered in the Arctic and sub-Arctic regions, is not caused by aqueous bromine, but other oxidizing bromine species (e.g., gaseous-phase bromine species).
Description:
The special characteristics of mercury, such as, its long-range atmospheric transport, its transformation between various species, biomagnification and its role as a neurotoxin, make it a pollutant of global concern. The chemical processes that take place in the atmosphere and water systems are closely linked and affect the transport of mercury. The kinetics of aqueous elemental mercury oxidation by aqueous bromine species detected by Dithizone-Hg(II) complexation-UV-VIS spectroscopy was extensively investigated in this study. The second-order oxidation rate constants at room temperature (294-296K) for the Hg"("a"q")^0-Br"2, Hg"("a"q")^0-HOBr and Hg"("a"q")^0-OBr^- are determined to be 0.20+/-0.03, 0.28+/-0.02 and 0.27+/-0.04M^-^1s^-^1, respectively. Such small oxidation rate constants also mean that the important atmospheric ''sink'' for mercury, which was discovered in the Arctic and sub-Arctic regions, is not caused by aqueous bromine, but other oxidizing bromine species (e.g., gaseous-phase bromine species).
