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Study on the interaction locations between Humic acid and Pyrene
MA Xingke 1,PENG Jinghe 2,ZHU Yaxian 3,WU Fang 4,ZHANG Yong 4 *
1.Collegy of Sci. Henan Univ. of Tech.,
2.Environ. Sci. Res. center, Xiamen Univ., Xiamen, 361005
3.Chem. Dept, Xiamen Univ., Xiamen, 361005
4.State key lab of Mar. Environ. Sci., Xiamen Univ., Xiamen, 361005
*Correspondence author
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Funding: none
Opened online:16 February 2012
Accepted by: none
Citation: MA Xingke,PENG Jinghe,ZHU Yaxian.Study on the interaction locations between Humic acid and Pyrene[OL]. [16 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4465128
 
 
IFluorescence quenching method was employed to determine the binding constant (Koc) of Humic acid (HA) - Pyrene (Py). The effects of pH value, ionic strength and heavy metal (HM) ions on the Koc were investigated and used to discuss the interaction mechanism between HA and Py. A fluorescent probe method was established and firstly applied to study the interaction between HA and Py by investigating the variation of I1/I3 with the chemical conditions of HA solution. Experimental results indicated that I1/I3 values showed an opposite trend compared to that of Koc, but an identical explanation on the interaction between HA and Py was obtained. The effects of HM ions on the interaction between HA and Py were dependent on the binding sites of HA and HM ions which was located at the carboxyl and hydroxyl. 1H NMR was applied to search for the binding site between HA and Py which was located at aliphatic chain of the HA.n this paper.
Keywords:Interaction; Fluorometry; NMR; Humic Acid; Py
 
 
 

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