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Interactions of dissolved humic substances with oppositely charged fluorescent dyes for tracer techniques

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Title: Interactions of dissolved humic substances with oppositely charged fluorescent dyes for tracer techniques
Authors: Hafuka, Akira Browse this author
Ding, Qing Browse this author
Yamamura, Hiroshi Browse this author →KAKEN DB
Yamada, Koji Browse this author →KAKEN DB
Satoh, Hisashi Browse this author →KAKEN DB
Keywords: Tracer
Stern–Volmer plot
Fluorescein
Rhodamine 6G
Issue Date: 15-Nov-2015
Publisher: Elsevier
Journal Title: Water Research
Volume: 85
Start Page: 193
End Page: 198
Publisher DOI: 10.1016/j.watres.2015.08.039
PMID: 26318652
Abstract: To investigate interactions between oppositely charged fluorescent dyes and dissolved humic substances, fluorescence quenching of fluorescein and rhodamine 6G with dissolved humic substances was performed. Binding coefficients were obtained by the Stern–Volmer equation. The fluorescence of rhodamine 6G was largely quenched by the addition of humic acid and a non-linear Stern–Volmer plot was obtained. This strong quenching may be caused by the electrostatic interaction between cationic rhodamine 6G and humic acid and strengthened by the hydrophobic repulsion. In contrast, the quenching and interactive effects of dissolved humic substances for fluorescein were relatively weak.
Rights: © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/67597
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 久

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