Preparation Of Collagen Fiber-Loaded Metal Ion Materials And Its Mechanism Of Adsorbing Fluoride Ions In Water
Keywords
Collagen Fiber Loading Metal Ions, Adsorption, Fluoride Removal, Characterization
Abstract
A new fluoride removal material based on collagen fibers loaded with metal ions (MICF) was prepared using collagen fibers and several metal salts, and comparative experiments were conducted on its adsorption of fluoride ions in aqueous solutions. The results show that collagen fiber-loaded zirconium (¢ó) (ZrCF) has good adsorption performance for fluorine. Its adsorption effect is basically independent of ionic strength in the pH range of 4.0 to 9.0. Common anions (Cl-, NO-3, SO2-4 ) does not show any interference effect on the adsorption of fluorine. The morphology, properties and adsorption mechanism of ZrCF were characterized and discussed through scanning electron microscopy (SEM), surface charge, and infrared spectroscopy (IR). SEM observed that metal ions were evenly dispersed on collagen fibers; the isoelectric point of ZrCF was measured to increase to 9.0 using the solid phase distribution method; combined with the pH changes of the solution before and after adsorption and IR characterization, it was revealed that the adsorption of fluoride ions on ZrCF is coordinated The exchange process is the main one. During the adsorption, the hydroxyl groups on the surface of Zr(¢ô) metal oxide form coordination complexes with fluoride ions, releasing H+.
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Original research was done by Deng Hui,Liao Xuepin
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