Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights

Reaction mechanisms for the removal of Hg0 by a TiO2 photocatalyst in the presence of O2, the main electron acceptor for the photocatalyst, were proposed. The Hg0 removal efficiency was over 90%, and the desorption efficiency was approximately 70%. As the photocatalyst reacted with Hg0, TiO2 was act...

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Autores principales:	Jung Hoon Lim, Tai Gyu Lee
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Elemental mercury (Hg0) Titanium dioxide (TiO2) Adsorption Desorption Alcohol Fluorescent light Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/8cee99b4449e4a89a3cf83699f657657
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spelling	oai:doaj.org-article:8cee99b4449e4a89a3cf83699f6576572021-11-18T04:52:52ZChemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights2666-821110.1016/j.ceja.2021.100157https://doaj.org/article/8cee99b4449e4a89a3cf83699f6576572021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121000739https://doaj.org/toc/2666-8211Reaction mechanisms for the removal of Hg0 by a TiO2 photocatalyst in the presence of O2, the main electron acceptor for the photocatalyst, were proposed. The Hg0 removal efficiency was over 90%, and the desorption efficiency was approximately 70%. As the photocatalyst reacted with Hg0, TiO2 was activated, forming OH radicals on the surface that oxidized Hg. HgO was formed in the first layer, and Hg0 was captured. Then, oxidized Hg acted as an electron acceptor. Physical adsorption between Hg0 molecules was realized by the reaction of Hg0 and HgOH. The adsorption of Hg0 was analyzed by various surface analysis methods, and the results proved that physical and chemical adsorption occurred. After this adsorption, desorption with alcohol was performed. Hg0 was desorbed, and HgO was reduced by the simultaneous illumination by light and addition of alcohol. The analytical and calculated values were compared for quantitative confirmation.Jung Hoon LimTai Gyu LeeElsevierarticleElemental mercury (Hg0)Titanium dioxide (TiO2)AdsorptionDesorptionAlcoholFluorescent lightChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100157- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Elemental mercury (Hg0) Titanium dioxide (TiO2) Adsorption Desorption Alcohol Fluorescent light Chemical engineering TP155-156
spellingShingle	Elemental mercury (Hg0) Titanium dioxide (TiO2) Adsorption Desorption Alcohol Fluorescent light Chemical engineering TP155-156 Jung Hoon Lim Tai Gyu Lee Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights
description	Reaction mechanisms for the removal of Hg0 by a TiO2 photocatalyst in the presence of O2, the main electron acceptor for the photocatalyst, were proposed. The Hg0 removal efficiency was over 90%, and the desorption efficiency was approximately 70%. As the photocatalyst reacted with Hg0, TiO2 was activated, forming OH radicals on the surface that oxidized Hg. HgO was formed in the first layer, and Hg0 was captured. Then, oxidized Hg acted as an electron acceptor. Physical adsorption between Hg0 molecules was realized by the reaction of Hg0 and HgOH. The adsorption of Hg0 was analyzed by various surface analysis methods, and the results proved that physical and chemical adsorption occurred. After this adsorption, desorption with alcohol was performed. Hg0 was desorbed, and HgO was reduced by the simultaneous illumination by light and addition of alcohol. The analytical and calculated values were compared for quantitative confirmation.
format	article
author	Jung Hoon Lim Tai Gyu Lee
author_facet	Jung Hoon Lim Tai Gyu Lee
author_sort	Jung Hoon Lim
title	Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights
title_short	Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights
title_full	Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights
title_fullStr	Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights
title_full_unstemmed	Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights
title_sort	chemistry of the unusually high uptake and recovery of gas-phase hg0 by tio2 even under household fluorescent lights
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/8cee99b4449e4a89a3cf83699f657657
work_keys_str_mv	AT junghoonlim chemistryoftheunusuallyhighuptakeandrecoveryofgasphasehg0bytio2evenunderhouseholdfluorescentlights AT taigyulee chemistryoftheunusuallyhighuptakeandrecoveryofgasphasehg0bytio2evenunderhouseholdfluorescentlights
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Chemistry of the unusually high uptake and recovery of gas-phase Hg0 by TiO2 even under household fluorescent lights

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