Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment Processes
Di-through octachlorinated naphthalenes (DiCNs, TrCNs, TeCNs, PeCNs, HxCNs, HpCNs and OcCN) in landfill leachates can be analyzed with the same cleanup procedure as dioxins. In this study, a modified method was developed by confirming the elution order of each isomer of polychlorinated naphthalenes...
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Japan Society on Water Environment
2021-01-01
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doaj-2e587542000d4a03bdf8e6e891d7d7372021-05-03T04:50:45ZengJapan Society on Water EnvironmentJournal of Water and Environment Technology1348-21651348-21652021-01-01192859510.2965/jwet.20-13510.2965/jwet.20-135Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment ProcessesKoji Ito0Hiroshi Kameoka1Junko Ono2Arisa Banno3Yoshinori Yabuki4 Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture, Habikino, Japan Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture, Habikino, Japan Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture, Habikino, Japan Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture, Habikino, Japan Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture, Habikino, Japan Di-through octachlorinated naphthalenes (DiCNs, TrCNs, TeCNs, PeCNs, HxCNs, HpCNs and OcCN) in landfill leachates can be analyzed with the same cleanup procedure as dioxins. In this study, a modified method was developed by confirming the elution order of each isomer of polychlorinated naphthalenes (PCNs) in a chromatogram of a gas chromatograph/high resolution mass spectrometer (GC/HRMS) using an Rh-12 ms capillary column, which is mainly employed for the analysis of dioxins. Using this method, PCNs in landfill leachate samples and treated leachate samples from each corresponding wastewater treatment process were quantified. PCN concentrations in landfill leachates ranged from 8.0–12,000 pg/L, and DiCNs-PeCNs were detected in almost all samples. Removal of PCNs by flocculation and active carbon treatment was greater than that achieved by activated sludge treatment in wastewater treatment plants. Furthermore, by changing the temperature of the H2SO4 coated silica gel column in the modified method, it became possible to measure monochlorinated naphthalenes (MoCNs), which could not be measured previously. MoCN concentrations detected were much higher compared to concentrations of DiCNs-OcCN in most of landfill leachates. Unlike PCNs, MoCNs are not POPs, but they are nevertheless important for understanding the properties of landfill leachates. https://www.jstage.jst.go.jp/article/jwet/19/2/19_20-135/_pdf polychlorinated naphthaleneslandfill leachategas chromatographyhigh resolution mass spectrometry |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Koji Ito Hiroshi Kameoka Junko Ono Arisa Banno Yoshinori Yabuki |
spellingShingle |
Koji Ito Hiroshi Kameoka Junko Ono Arisa Banno Yoshinori Yabuki Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment Processes Journal of Water and Environment Technology polychlorinated naphthalenes landfill leachate gas chromatography high resolution mass spectrometry |
author_facet |
Koji Ito Hiroshi Kameoka Junko Ono Arisa Banno Yoshinori Yabuki |
author_sort |
Koji Ito |
title |
Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment Processes |
title_short |
Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment Processes |
title_full |
Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment Processes |
title_fullStr |
Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment Processes |
title_full_unstemmed |
Determination of Polychlorinated Naphthalenes in Landfill Leachates and its Removal in Wastewater Treatment Processes |
title_sort |
determination of polychlorinated naphthalenes in landfill leachates and its removal in wastewater treatment processes |
publisher |
Japan Society on Water Environment |
series |
Journal of Water and Environment Technology |
issn |
1348-2165 1348-2165 |
publishDate |
2021-01-01 |
description |
Di-through octachlorinated naphthalenes (DiCNs, TrCNs, TeCNs, PeCNs, HxCNs, HpCNs and OcCN) in landfill leachates can be analyzed with the same cleanup procedure as dioxins. In this study, a modified method was developed by confirming the elution order of each isomer of polychlorinated naphthalenes (PCNs) in a chromatogram of a gas chromatograph/high resolution mass spectrometer (GC/HRMS) using an Rh-12 ms capillary column, which is mainly employed for the analysis of dioxins. Using this method, PCNs in landfill leachate samples and treated leachate samples from each corresponding wastewater treatment process were quantified. PCN concentrations in landfill leachates ranged from 8.0–12,000 pg/L, and DiCNs-PeCNs were detected in almost all samples. Removal of PCNs by flocculation and active carbon treatment was greater than that achieved by activated sludge treatment in wastewater treatment plants. Furthermore, by changing the temperature of the H2SO4 coated silica gel column in the modified method, it became possible to measure monochlorinated naphthalenes (MoCNs), which could not be measured previously. MoCN concentrations detected were much higher compared to concentrations of DiCNs-OcCN in most of landfill leachates. Unlike PCNs, MoCNs are not POPs, but they are nevertheless important for understanding the properties of landfill leachates. |
topic |
polychlorinated naphthalenes landfill leachate gas chromatography high resolution mass spectrometry |
url |
https://www.jstage.jst.go.jp/article/jwet/19/2/19_20-135/_pdf
|
work_keys_str_mv |
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