Differentiation of hydroxyl-aluminum species at lower OH/Al ratios by combination of 27Al NMR and Ferron assay improved with kinetic resolution
文献类型：期刊论文
| 作者 | Feng, Chenghong; Tang, Hongxiao; Wang, Dongsheng |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2007-09-15 |
| 卷号 | 305期号:1页码:76-82 |
| 关键词 | Al-13 reactive Al polymers speciation Al-ferron reaction kinetics |
| 英文摘要 | The hydroxyl-Al polymers are the most effective components in PACI coagulants, but their chemical speciation is often indistinct especially at lower molar OH/Al ratios (B). Two sets of hydroxyl-Al solutions with different B values and preparation temperatures were studied with both Ferron assay and 27 Al NMR spectroscopy. By using the modified kinetic resolution procedure to fit the scanning absorbance data, the reactive polymeric Al species (Al-b) could be differentiated further into two fractions: the faster reacting polymers Al-b1, and slower reacting polymers Al-b2. They were distinguished by their distinct rate constants of reactions with Ferron. It was identified simultaneously by the 27Al NMR spectroscopy that the Al-b2 fraction closely corresponded to Al-13 of Keggin-structure in most samples, while the Al-b1 at the moderate OH/Al ratios of B < 2 would be assigned to the species of Al-6-type series which were undetectable in current Al-27 NMR spectrum (Al-un). Conventional Al-27 NMR spectroscopy in combination with Ferron assay improved with kinetic resolution can better explore the chemical speciation for hydroxyl-Al polymers in partially neutralized Al solutions and thus give a better explanation of coagulation mechanisms of these species when they were applied in water treatment. (c) 2007 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000249254900012 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22548]  |
| 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 | Feng, Chenghong,Tang, Hongxiao,Wang, Dongsheng. Differentiation of hydroxyl-aluminum species at lower OH/Al ratios by combination of 27Al NMR and Ferron assay improved with kinetic resolution[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2007,305(1):76-82. |
| APA | Feng, Chenghong,Tang, Hongxiao,&Wang, Dongsheng.(2007).Differentiation of hydroxyl-aluminum species at lower OH/Al ratios by combination of 27Al NMR and Ferron assay improved with kinetic resolution.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,305(1),76-82. |
| MLA | Feng, Chenghong,et al."Differentiation of hydroxyl-aluminum species at lower OH/Al ratios by combination of 27Al NMR and Ferron assay improved with kinetic resolution".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 305.1(2007):76-82. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。