The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity
Photodegradation of methylmercury (MeHg) is an important process in mercury cycling that maintains low concentrations of MeHg in freshwater lakes; however, less is known about importance of this process in marine waters. The photo-induced formation of dissolved gaseous mercury (DGM, Hg-0) from MeHg...
Published in: | Desalination and Water Treatment |
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ftseoulnuniv:oai:s-space.snu.ac.kr:10371/190691 2024-06-23T07:50:35+00:00 The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity Kim, Moon-Kyung Won, A-Young Zoh, Kyung-Duk Zoh, Kyung-Duk 2018-08-20 https://hdl.handle.net/10371/190691 https://doi.org/10.1080/19443994.2014.986829 영어 unknown Taylor & Francis Desalination and Water Treatment, Vol.57 No.2, pp.610-619 1944-3994 https://hdl.handle.net/10371/190691 doi:10.1080/19443994.2014.986829 000366662900013 2-s2.0-84952299902 44716 ARCTIC ALASKAN LAKE ORGANIC-MATTER NATURAL-WATERS HYDROXYL RADICALS FRESH-WATER PHOTOINDUCED DEGRADATION FLORIDA EVERGLADES AQUEOUS-SOLUTION SURFACE WATERS PHOTOLYSIS Methylmercury Dissolved gaseous mercury Photodegradation Salinity Article ART 2018 ftseoulnuniv https://doi.org/10.1080/19443994.2014.986829 2024-06-05T08:38:56Z Photodegradation of methylmercury (MeHg) is an important process in mercury cycling that maintains low concentrations of MeHg in freshwater lakes; however, less is known about importance of this process in marine waters. The photo-induced formation of dissolved gaseous mercury (DGM, Hg-0) from MeHg removal was investigated. This study examined the effect of various environmental factors (i.e. light wavelength and intensity, and MeHg concentration), and primary water constituents on the abiotic photodegradation of MeHg, especially under different salinity. MeHg photodegradation rates were positively correlated with the UV light intensity, implying that the attenuation of UV radiation had a significant effect on MeHg photodegradation. However, a high dissolved organic matters concentration and salinity inhibited MeHg photodegradation. DGM was always produced during the photodegradation of MeHg. Photodegradation rates of MeHg and DGM production decreased with increasing salinity, suggesting that the presence of chloride ions inhibited MeHg photodegradation. Therefore, this study implies that MeHg in freshwater could be more rapidly demethylated than that in seawater. In other words, MeHg flowing into the lake or river would be almost removed by photo demethylation. However, MeHg flowing to seawater would be hardly removed, which could have more chance for bioaccumulation in seawater. N 1 Article in Journal/Newspaper Arctic Seoul National University: S-Space Arctic Desalination and Water Treatment 57 2 610 619 |
institution |
Open Polar |
collection |
Seoul National University: S-Space |
op_collection_id |
ftseoulnuniv |
language |
unknown |
topic |
ARCTIC ALASKAN LAKE ORGANIC-MATTER NATURAL-WATERS HYDROXYL RADICALS FRESH-WATER PHOTOINDUCED DEGRADATION FLORIDA EVERGLADES AQUEOUS-SOLUTION SURFACE WATERS PHOTOLYSIS Methylmercury Dissolved gaseous mercury Photodegradation Salinity |
spellingShingle |
ARCTIC ALASKAN LAKE ORGANIC-MATTER NATURAL-WATERS HYDROXYL RADICALS FRESH-WATER PHOTOINDUCED DEGRADATION FLORIDA EVERGLADES AQUEOUS-SOLUTION SURFACE WATERS PHOTOLYSIS Methylmercury Dissolved gaseous mercury Photodegradation Salinity Kim, Moon-Kyung Won, A-Young Zoh, Kyung-Duk The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity |
topic_facet |
ARCTIC ALASKAN LAKE ORGANIC-MATTER NATURAL-WATERS HYDROXYL RADICALS FRESH-WATER PHOTOINDUCED DEGRADATION FLORIDA EVERGLADES AQUEOUS-SOLUTION SURFACE WATERS PHOTOLYSIS Methylmercury Dissolved gaseous mercury Photodegradation Salinity |
description |
Photodegradation of methylmercury (MeHg) is an important process in mercury cycling that maintains low concentrations of MeHg in freshwater lakes; however, less is known about importance of this process in marine waters. The photo-induced formation of dissolved gaseous mercury (DGM, Hg-0) from MeHg removal was investigated. This study examined the effect of various environmental factors (i.e. light wavelength and intensity, and MeHg concentration), and primary water constituents on the abiotic photodegradation of MeHg, especially under different salinity. MeHg photodegradation rates were positively correlated with the UV light intensity, implying that the attenuation of UV radiation had a significant effect on MeHg photodegradation. However, a high dissolved organic matters concentration and salinity inhibited MeHg photodegradation. DGM was always produced during the photodegradation of MeHg. Photodegradation rates of MeHg and DGM production decreased with increasing salinity, suggesting that the presence of chloride ions inhibited MeHg photodegradation. Therefore, this study implies that MeHg in freshwater could be more rapidly demethylated than that in seawater. In other words, MeHg flowing into the lake or river would be almost removed by photo demethylation. However, MeHg flowing to seawater would be hardly removed, which could have more chance for bioaccumulation in seawater. N 1 |
author2 |
Zoh, Kyung-Duk |
format |
Article in Journal/Newspaper |
author |
Kim, Moon-Kyung Won, A-Young Zoh, Kyung-Duk |
author_facet |
Kim, Moon-Kyung Won, A-Young Zoh, Kyung-Duk |
author_sort |
Kim, Moon-Kyung |
title |
The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity |
title_short |
The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity |
title_full |
The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity |
title_fullStr |
The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity |
title_full_unstemmed |
The production of dissolved gaseous mercury from methylmercury photodegradation at different salinity |
title_sort |
production of dissolved gaseous mercury from methylmercury photodegradation at different salinity |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
https://hdl.handle.net/10371/190691 https://doi.org/10.1080/19443994.2014.986829 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Desalination and Water Treatment, Vol.57 No.2, pp.610-619 1944-3994 https://hdl.handle.net/10371/190691 doi:10.1080/19443994.2014.986829 000366662900013 2-s2.0-84952299902 44716 |
op_doi |
https://doi.org/10.1080/19443994.2014.986829 |
container_title |
Desalination and Water Treatment |
container_volume |
57 |
container_issue |
2 |
container_start_page |
610 |
op_container_end_page |
619 |
_version_ |
1802641497582993408 |