| Hydrolyzed AI（Ⅲ） clusters： Speciation stability of nano-All3 |
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| 作者姓名： | Dongsheng Wang Shuifeng Wang Chihpin Huang Christopher W K. Chow |
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| 作者单位： | [1]Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail： wgds@rcees.ac.cn [2]Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan, China [3]Australian Water Quality Centre, SA Water Corporation, 250 Victoria Square, Adelaide, SA 5000, South Australia |
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| 基金项目： | This work was supported by the National Natural Science
Foundation of China (No. 51025830, 50921064),
the National Hi-Tech Research and Development Program
(863) of China (No. 2008AA06A414). |
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| 摘 要： | Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size e ect of coagulation with
inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR,
photo correlation spectroscopy (PCS), and Ferron assay. Results showed that concentration and temperature exhibited di erent roles
on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that
of Al13, which has been confirmed in a dimension range of 1–2 nm by PCS. Al13 solutions at high concentrations (0.5–2.11 mol/L)
were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the
disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations,
Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90°C.
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| 关 键 词： | 形态稳定 纳米尺寸 Al13形态 无机高分子絮凝剂 Ferron 集群 AI 水解 |
| 收稿时间： | 7/1/2010 12:00:00 AM |
| 修稿时间： | 2010/9/25 0:00:00 |
Hydrolyzed Al(III) clusters: Speciation stability of nano-Al13 |
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| Dongsheng Wang,Shuifeng Wang,Chihpin Huang,Christopher W K. Chow.Hydrolyzed Al(III) clusters: Speciation stability of nano-Al13[J].Journal of Environmental Sciences,2011,23(5):705-710. |
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| Authors: | Dongsheng Wang Shuifeng Wang Chihpin Huang and Christopher W K Chow |
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| Institution: | 1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: wgds@rcees.ac.cn,1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.,2. Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan, China and 1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: wgds@rcees.ac.cn
3. Australian Water Quality Centre, SA Water Corporation, 250 Victoria Square, Adelaide, SA 5000, South Australia |
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| Abstract: | Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR, photo correlation spectroscopy (PCS), and Ferron assay. Results showed that concentration and temperature exhibited different roles on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS. Al13 solutions at high concentrations (0.5-2.11 mol/L) were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations, Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90 degrees C. |
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| Keywords: | nano-Al13 clusters inorganic polymer flocculant speciation stability |
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