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浙江大学学报（理学版）
浙江大学学报（理学版）  2017, Vol. 44 Issue (6): 742-748    DOI: 10.3785/j.issn.1008-9497.2017.06.014
化学     
壳聚糖投加量对白芍水提液絮凝效果的影响研究
张建伟, 王新文, 冯颖, 苏辰长
沈阳化工大学 能源与动力工程学院, 辽宁 沈阳 110142
Experimental study on the effect of chitosan dosage on flocculation efficiency of water extract of white peony
ZHANG Jianwei, WANG Xinwen, FENG Ying, SU Chenchang
School of Energy and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
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摘要： 采用紫外/可见分光光度计、激光粒度分析仪、微电泳仪等，探究壳聚糖投加量对白芍水提液絮凝率、分形维数、粒度分布、ζ电位的影响.实验结果显示，壳聚糖投加量为3.2 mL （0.31 g·L-1）时，絮凝率达到最大值80.88%，此时总黄酮损失率为10.67%，上清液平均粒径为5.42 μm，ζ最接近零电位，为-1.168 2 mV，絮体分形维数为1.463；应用激光粒子测速（PIV）系统对絮体的沉降过程进行分析，建立了沉降过程的数学模型，絮凝过程的最大沉降速度为0.324 1 mm·s-1，当絮体特征尺寸在2.75~3.75 μm时，絮体的沉降性能较优.
关键词： 壳聚糖;  ζ  电位;  粒度分布;  PIV;  沉降速度模型    
Abstract: By changing the dosage of the chitosan, UV/visible spectrophotometry meter, laser particle size analyzer, and micro electrophoresis were applied to explore the influence of dosage of chitoson on white peony's water-extraction. The flocculation rate, fractal dimension, particle size distribution, and zeta potential were measured to estimate the influence. Experimental results show that the dosage of chitoson is 0.31 g·L-1, and the flocculating rate reaches a maximum value of 80.88%. At this time, the losing ratio of flavones is 10.67%, average particle diameter of supernatant is 5.42 μm, zeta potential is -1.168 2 mV which is closest to zero potential, the fractal dimension of flocs is 1.463. The particle imagine velocity (PIV) system was used to record the settling process, thus established the mathematical model of sedimentation process. And, the maximum settling velocity of flocculation process is 0.324 1 mm·s-1. When the floc characteristic size ranges from 2.75 to 3.75 μm, the flocs have a better settling performance.
Key words: chitosan    zeta potential    particle size distribution    PIV    sedimentation velocity model
收稿日期: 2017-01-12 出版日期: 2018-04-09
CLC:  TQ028  
基金资助: 国家自然科学基金资助项目（21406142，21476141）.
作者简介: 张建伟(1964-),ORCID:http://orcid.org/0000-0002-2898-8108,男,博士,教授,主要从事非均相固液分离、混合技术等研究,E-mail:zhangjianwei@syuct.edu.cn.
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引用本文:

张建伟, 王新文, 冯颖, 苏辰长. 壳聚糖投加量对白芍水提液絮凝效果的影响研究[J]. 浙江大学学报（理学版）, 2017, 44(6): 742-748.

ZHANG Jianwei, WANG Xinwen, FENG Ying, SU Chenchang. Experimental study on the effect of chitosan dosage on flocculation efficiency of water extract of white peony. Journal of ZheJIang University(Science Edition), 2017, 44(6): 742-748.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2017.06.014    或    https://www.zjujournals.com/sci/CN/Y2017/V44/I6/742

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