Study on the Interaction Between Chrysene with Humic Acids Using Fluorescence Spectroscopy

文献类型： 外文期刊

第一作者： Wu, Jinbao

作者： Wu, Jinbao;Geng, Bing;Sun, XueKai

作者机构：

关键词： Chrysene; fluorescence spectra; humic acids (HA); interaction

期刊名称：POLYCYCLIC AROMATIC COMPOUNDS （ 影响因子：3.744； 五年影响因子：3.584 ）

ISSN： 1040-6638

年卷期： 2020 年 40 卷 4 期

页码：

收录情况： SCI

摘要： The interaction between chrysene with humic acids (HA) was studied by the fluorescence spectroscopy. The results of fluorescence spectra revealed that chrysene could strongly quench the intrinsic fluorescence of HA through a static quenching procedure. The apparent binding constantsKand number of binding sites n of chrysene with HA were 2.99 x 10(5)and 1.0 which were obtained by the fluorescence quenching method. The thermodynamic parameters enthalpy change (Delta H), entropy change (Delta S) were negative, which indicated that the interaction of chrysene with HA was driven mainly by van der Waals forces and hydrogen bonds. The process of interaction was a spontaneous process in which Gibbs free energy change was negative. The results of three-dimensional fluorescence spectra showed that the chrysene entered into the hydrophobic cavities in some domain of HA.

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