open access

https://hdl.handle.net/2115/67597

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

英語

Rhodamine 6G

2015-11-15

Elsevier

Water Research

85

193-198

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.

学術雑誌論文

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