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Spatial and temporal variations and factors controlling the concentrations of hydrogen peroxide and organic peroxides in rivers

https://hiroshima.repo.nii.ac.jp/records/2006818
https://hiroshima.repo.nii.ac.jp/records/2006818
e8d68bf4-50bc-4aee-bfca-94f7c26467cc
名前 / ファイル ライセンス アクション
EnvironChem_6_524.pdf EnvironChem_6_524.pdf (909.7 KB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Spatial and temporal variations and factors controlling the concentrations of hydrogen peroxide and organic peroxides in rivers
言語 en
作成者 Mostofa, Khan M. G.

× Mostofa, Khan M. G.

en Mostofa, Khan M. G.

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Sakugawa, Hiroshi

× Sakugawa, Hiroshi

en Sakugawa, Hiroshi

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
主題
主題Scheme Other
主題 dissolved organic carbon
主題
主題Scheme Other
主題 fluorescent dissolved organic matter
主題
主題Scheme Other
主題 fulvic acid
主題
主題Scheme Other
主題 Tryptophan
主題
主題Scheme Other
主題 upstream and downstream
主題
主題Scheme NDC
主題 450
内容記述
内容記述 Hydrogen peroxide (H2O2) and organic peroxides (ROOH) were examined in water samples collected from the upstream and downstream sites of two Japanese rivers (the Kurose and the Ohta). H2O2 concentrations during monthly measurements varied between 6 and 213nM in the Kurose River and 33 and 188nM in the Ohta River. ROOH varied between 0 and 73nM in the Kurose River and 1 and 80nM in the Ohta. Concentrations of peroxides were higher during the summer months than in winter. H2O2 concentrations correlated well with the measured content of dissolved organic carbon and/or the fluorescence intensity of the fluorescent dissolved organic matter (FDOM) in the water from these rivers, which suggested that the dissolved organic matter and FDOM are the major sources of H2O2. Further characterisation of FDOM components by excitation emission matrix spectroscopy and parallel factor (PARAFAC) analysis indicated that fulvic acid is a dominant source of H2O2 in river waters, which accounted for 23-70% of H2O2 production in the Ohta River, 25-61% in the upstream and 28-63% in the downstream waters of the Kurose River, respectively. A fluorescent whitening agent and its photoproduct (4-biphenyl carboxaldehyde) together contributed 3-7% of H2O2 production in the downstream waters of the Kurose River. Tryptophan-like substances were a minor source of H2O2 (< 1%) in both rivers. An increase in the H2O2 concentration was observed in the diurnal samples collected at noon compared with the samples collected during the period before sunrise and after sunset, thus indicating that H2O2 was produced photochemically. This study demonstrates that H2O2 and ROOH are produced mainly from the photodegradation of FDOMs, such as fulvic acid.
言語 en
出版者
出版者 Commonwealth Scientific and Industrial Research Organisation Publishing
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ AO
出版タイプResource http://purl.org/coar/version/c_b1a7d7d4d402bcce
関連情報
識別子タイプ DOI
関連識別子 10.1071/EN09070
関連情報
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1071/EN09070
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1448-2517
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AA11992244
開始ページ
開始ページ 524
書誌情報 Environmental Chemistry
Environmental Chemistry

巻 6, 号 6, p. 524-534, 発行日 2009-12-18
旧ID 29235
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