Coagulation of humic acid by PACl with high content of Al-13: The role of aluminum speciation
文献类型：期刊论文
| 作者 | Liu, Huijuan; Hu, Chengzhi; Zhao, He; Qu, Jiuhui |
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2009-12-10 |
| 卷号 | 70期号:2页码:225-230 |
| 关键词 | Al-13 Aluminum speciation Coagulation-flocculation Humic acid |
| 中文摘要 | The role of aluminum speciation in coagulation-flocculation of humic acid (HA) by polyaluminum chloride (PACl) with high content of Al-13 was investigated using Al-21 NMR spectroscopy, solid-state Al-27 NMR spectroscopy, electrospray ionization mass spectrometry (ESI-MS) and Al-Ferron method. Experimental results show that, in the coagulation process, the Al-13 polymers are the dominant species in acidic pH and some of them change to Al precipitates at higher pH. The mechanism of HA removal is directly related to the form of aluminum in solution. The maximum removal of the HA is found to occur in the pH range from 5.0 to 6.0, which means that charge neutralization by Al-13 polymer is the main mechanism of coagulation at slightly acidic pH. The results of zeta potential and solid-state Al-27 NMR spectroscopy of the flocs also confirm that positive polymers are very effective in charge neutralizing with HA molecules. Adsorption and sweep coagulation of HA by amorphous Al(OH)(3)(S) play an important role at pH > 6.0 or over dosing. (C) 2009 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000272671800013 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21647]  |
| 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 | Liu, Huijuan,Hu, Chengzhi,Zhao, He,et al. Coagulation of humic acid by PACl with high content of Al-13: The role of aluminum speciation[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2009,70(2):225-230. |
| APA | Liu, Huijuan,Hu, Chengzhi,Zhao, He,&Qu, Jiuhui.(2009).Coagulation of humic acid by PACl with high content of Al-13: The role of aluminum speciation.SEPARATION AND PURIFICATION TECHNOLOGY,70(2),225-230. |
| MLA | Liu, Huijuan,et al."Coagulation of humic acid by PACl with high content of Al-13: The role of aluminum speciation".SEPARATION AND PURIFICATION TECHNOLOGY 70.2(2009):225-230. |
入库方式： OAI收割
来源：生态环境研究中心
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