Investigation of the property of kaolin-alum flocs at acidic pH
文献类型：期刊论文
| 作者 | Yu, Wen-zheng ; Gregory, John ; Liu, Hui-juan ; Qu, Jiu-hui |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2014 |
| 卷号 | 443期号:1页码:177-181 |
| 关键词 | Floc breakage Re-growth pH Fractal dimension Polymeric Al species |
| ISSN号 | 0927-7757 |
| 中文摘要 | The formation, breakage and re-growth of flocs were investigated using aluminium sulfate (alum) at acidic pH to explore the property of flocs and coagulation mechanism by different Al species formed in situ. The broken flocs can fully re-grow to the size before breakage, when monomeric Al or polymeric Al-13 forms dominate the coagulant species. However, for relatively unstable small polymeric Al (Al-3-Al-8) and alum precipitate, the break-up process displayed a distinct irreversibility. There was a distinct increase of fractal dimension (D-f) when the pH changed from 5.2 to 6.0, as well as the strength of flocs (the size of broken flocs), which meant that the flocs structure changed significantly. Also the D-f of broken flocs was higher than that of flocs before breakage, and the D-f values of re-grown flocs were not greatly different from the values before breakage. The number of small flocs after breakage and re-growth was much lower than that before breakage at acidic pH (pH 5.2) when the average size of flocs was chosen at the same value before breakage and after re-growth. An important finding is that the strength of flocs is strongly correlated with D-f of flocs. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000342501300025 |
| 公开日期 | 2015-03-26 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9562]  |
| 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, Wen-zheng,Gregory, John,Liu, Hui-juan,et al. Investigation of the property of kaolin-alum flocs at acidic pH[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2014,443(1):177-181. |
| APA | Yu, Wen-zheng,Gregory, John,Liu, Hui-juan,&Qu, Jiu-hui.(2014).Investigation of the property of kaolin-alum flocs at acidic pH.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,443(1),177-181. |
| MLA | Yu, Wen-zheng,et al."Investigation of the property of kaolin-alum flocs at acidic pH".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 443.1(2014):177-181. |
入库方式： OAI收割
来源：生态环境研究中心
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