Crystallization and Phase Transformations of Aluminum (Oxy)hydroxide Polymorphs in Caustic Aqueous Solution
文献类型：期刊论文
| 作者 | Zhang, Hailin4,5,6; Zhang, Xin6; Graham, Trent R.6; Pearce, Carolyn, I3,6; Hlushko, Hanna2; LaVerne, Jay A.1; Liu, Lili6; Wang, Suyun6; Zheng, Shili5; Zhang, Yi5 |
| 刊名 | INORGANIC CHEMISTRY
 |
| 出版日期 | 2021-06-05 |
| 卷号 | 60期号:13页码:9820-9832 |
| ISSN号 | 0020-1669 |
| DOI | 10.1021/acs.inorgchem.1c01111 |
| 英文摘要 | Gibbsite, bayerite, and boehmite are important aluminum (oxy)-hydroxide minerals in nature and have been widely deployed in various industrial applications. They are also major components in caustic nuclear wastes stored at various U.S. locations. Knowledge of their crystallization and phase transformation processes contributes to understanding their occurrence and could help optimize waste treatment processes. While it has been reported that partial conversion of bayerite and gibbsite to boehmite occurs in basic solutions at elevated temperatures, systematic studies of factors affecting the phase transformation as well as the underlying reaction mechanisms are nonexistent, particularly in highly alkaline solutions. We explored the effects of sodium hydroxide concentrations (0.1-3 M), reaction temperatures (60-100 degrees C), and aluminum concentrations (0.1-1 M) on the crystallization and transformation of these aluminum (oxy)hydroxides. Detailed structural and morphological characterization by X-ray diffraction (XRD), scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR) spectrometry revealed that these processes depend largely on the reaction temperature and the Al/OH- ratio. When 1 <= Al/OH- <= 2.5, the reactions favor formation of high-crystallinity precipitates, whereas at an Al/OH- ratio of >= 2.5 precipitation ceases unless the Al concentration is higher than 1 M. We identified pseudoboehmite, bayerite, and gibbsite as intermediate phases to bayerite, gibbsite and boehmite, respectively, all of which transform via dissolution-reprecipitation. Gibbsite transforms to boehmite in both acidic and weak caustic environments at temperatures above 80 degrees C. However, a "bar-shaped" gibbsite morphology dominates in highly caustic environments (3 M NaOH). The findings enable a robust basis for the selection of various solid phases by tuning the reaction conditions. |
| WOS关键词 | BOEHMITE GAMMA-ALOOH ; THERMAL-DECOMPOSITION ; FORMATION MECHANISM ; GIBBSITE ; SIZE ; MORPHOLOGY ; BAUXITE ; GROWTH ; NANOCOMPOSITES ; SPECTROSCOPY |
| 资助项目 | IDREAM (Interfacial Dynamics in Radioactive Environments and Materials), an Energy Frontier Research Center - U.S. Sciences (BES) ; DOE Office of Biological and Environmental Research ; DOE[DE-AC05-76RL0-1830] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000671099600061 |
| 资助机构 | IDREAM (Interfacial Dynamics in Radioactive Environments and Materials), an Energy Frontier Research Center - U.S. Sciences (BES) ; DOE Office of Biological and Environmental Research ; DOE |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/49489]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Zhang, Xin; Li, Ping; Wang, Zheming; Rosso, Kevin M. |
| 作者单位 | 1.Univ Notre Dame, Radiat Lab & Dept Phys, Notre Dame, IN 46556 USA 2.Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556 USA 3.Washington State Univ, Dept Chem, Pullman, WA 99164 USA 4.Univ Chinese Acad Sci, Sch Grad Study, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 6.Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99354 USA |
| 推荐引用方式 GB/T 7714 | Zhang, Hailin,Zhang, Xin,Graham, Trent R.,et al. Crystallization and Phase Transformations of Aluminum (Oxy)hydroxide Polymorphs in Caustic Aqueous Solution[J]. INORGANIC CHEMISTRY,2021,60(13):9820-9832. |
| APA | Zhang, Hailin.,Zhang, Xin.,Graham, Trent R..,Pearce, Carolyn, I.,Hlushko, Hanna.,...&Rosso, Kevin M..(2021).Crystallization and Phase Transformations of Aluminum (Oxy)hydroxide Polymorphs in Caustic Aqueous Solution.INORGANIC CHEMISTRY,60(13),9820-9832. |
| MLA | Zhang, Hailin,et al."Crystallization and Phase Transformations of Aluminum (Oxy)hydroxide Polymorphs in Caustic Aqueous Solution".INORGANIC CHEMISTRY 60.13(2021):9820-9832. |
入库方式： OAI收割
来源：过程工程研究所
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