A New Approach for the Flocculation Mechanism of Chitosan |
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Authors: | Liang Chen Donghui Chen Chongliang Wu |
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Institution: | (1) School of Environment Science and Engineering, Donghua University, 1882 Yan-An Road West, Shanghai, China, 200051 |
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Abstract: | A peak III/I ratio ( peak) in pyrene-fluorescence spectrum was used to measure the polarity of microenvironment of chitosan adsorbing pyrene molecules. The authors detected the pyrene-fluorescence spectrum of chitosan with different degrees of deacetylation (DD) and determined the relationship between the flocculation of bentonite colloid and the peak of chitosan with a different molecular weight (MW) and DD. It can be concluded that MW rather than DD plays a key role in the flocculation and that bond bridging rather than charge neutralization dominates the flocculation with chitosan from a microenvironmental structure of view. |
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Keywords: | Pyrene-fluorescence spectrum chitosan flocculation mechanism |
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