| Studying Flocculation Mechanism of Chitosan with Pyrene-fluores-cence Probe Method |
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| 引用本文： | 吴重亮 陈亮 陈东辉. Studying Flocculation Mechanism of Chitosan with Pyrene-fluores-cence Probe Method[J]. 中国化学, 2003, 21(9): 1224-1228. DOI: 10.1002/cjoc.20030210924 |
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| 作者姓名： | 吴重亮 陈亮 陈东辉 |
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| 作者单位： | SchoolofEnvironmentScienceandEngineering,DonghuaUniversity,Shanghai200051,China |
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| 摘 要： | A peak/ratio in pyrene-fluorescence spectrum was employed to measure the polarity of micro-environment of chitosan adsorb-ing py--rene molecules. The authors have in the first time detect-ed the pyrene-fluorescence spectrum of chitosan with different degrees of deacetylation (D. D. ), and found the relationship between the flocculaflon of bentonite colloid by chitosan and the peak/ratio values of different molecular weight (M. W. ) and D .D. of chitosan. We find that M.W. plays a key role in the flocculatlon, but D.D. has limited effect on it. From micro-en-vironmental structure of view, it can be proved that the inter-particle bridging rather than charge neutralization dominates the flocculatlon with chitosan.
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| 关 键 词： | 絮凝机理 壳聚糖 芘 荧光性探测器 荧光光谱 絮凝剂 污泥处理 |
Studying Flocculation Mechanism of Chitosan with Pyrene-fluorescence Probe Method |
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| CHEN,Liang CHEN,Dong-Hui WU,Chong-Liang School of Environment Science and Engineering,Donghua University,Shanghai ,China. Studying Flocculation Mechanism of Chitosan with Pyrene-fluorescence Probe Method[J]. Chinese Journal of Chemistry, 2003, 21(9): 1224-1228. DOI: 10.1002/cjoc.20030210924 |
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| Authors: | CHEN Liang CHEN Dong-Hui WU Chong-Liang School of Environment Science Engineering Donghua University Shanghai China |
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| Affiliation: | CHEN,Liang CHEN,Dong-Hui WU,Chong-Liang School of Environment Science and Engineering,Donghua University,Shanghai 200051,China |
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| Abstract: | A peak/ratio in pyrene-fluorescence spectrum was employed to measure the polarity of micro-environment of chitosan adsorbing pyrene molecules. The authors have in the first time detected the pyrene-fluorescence spectrum of chitosan with different degrees of deacetylation (D.D.), and found the relationship between the flocculation of bentonite colloid by chitosan and the peak/ratio values of different molecular weight (M.W.) and D.D. of chitosan. We find that M.W. plays a key role in the flocculation, but D.D. has limited effect on it. From micro-environmental structure of view, it can be proved that the interparticle bridging rather than charge neutralization dominates the flocculation with chitosan. |
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| Keywords: | pyrene-fluorescence spectrum chitosan flocculation mechanism |
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