Flocculation of kaolin particles by two typical polyelectrolytes: A comparative study on the kinetics and floc structures
文献类型：期刊论文
| 作者 | Yu, Jianfeng; Wang, Dongsheng; Ge, Xiaopeng; Yan, Mingquan; Yang, Min |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2006 |
| 卷号 | 290期号:2015-01-03页码:288-294 |
| 关键词 | polyelectrolyte kinetics floc structure charge neutralization bridging |
| 英文摘要 | The flocculation kinetics of kaolin particles induced by two polyelectrolytes is studied by using small-angle laser light scattering (SALLS). Two different methods, image analysis and SALLS, are used to calculated the fractal dimensions of flocs formed under different flocculation mechanisms. For a high charge density of polydiallyldimethylammoniurn chloride (PDADMAC), the initially flocculation rates are slow due to the quite low molecular weight. Smaller and more compact flocs are in the particle-particle connections, and restructuring of the flocs occurs in the flocculation process. With cationic polyacrylamide C498 of very high molecular weight and low charge density, however, the initially flocculation rates are much higher due to its rapid adsorption on kaolin particles, but it will take the adsorbed polymer a much longer time to reach equilibrium due to re-conformation. High potentialities of adsorption prevent the particles from entering the interior of the floc structure or rearrangement, which results in a more open floc structure. Different underlying flocculation mechanisms are evident for these two kinds of polyclectrolytes, in which charge neutralization is mainly involved for the low molecular weight and high charge density polymer of PDADMAC while polymer bridging is suggested to be the dominant mechanism for the high molecular weight polyelectrolyte of C498. (c) 2006 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000242425500039 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22998]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yu, Jianfeng,Wang, Dongsheng,Ge, Xiaopeng,et al. Flocculation of kaolin particles by two typical polyelectrolytes: A comparative study on the kinetics and floc structures[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2006,290(2015-01-03):288-294. |
| APA | Yu, Jianfeng,Wang, Dongsheng,Ge, Xiaopeng,Yan, Mingquan,&Yang, Min.(2006).Flocculation of kaolin particles by two typical polyelectrolytes: A comparative study on the kinetics and floc structures.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,290(2015-01-03),288-294. |
| MLA | Yu, Jianfeng,et al."Flocculation of kaolin particles by two typical polyelectrolytes: A comparative study on the kinetics and floc structures".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 290.2015-01-03(2006):288-294. |
入库方式： OAI收割
来源：生态环境研究中心
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