Adsorption of phosphate at the aluminum (hydr)oxides-water interface: Role of the surface acid-base properties
文献类型：期刊论文
| 作者 | Yang Xiaofang; Wang Dongsheng; Sun Zhongxi; Tang Hongxiao |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2007-04-05 |
| 卷号 | 297期号:1页码:84-90 |
| 关键词 | pseudo-boehmite alpha Al2O3 surface acid-base properties phosphate adsorption |
| 英文摘要 | In this paper, the adsorption of phosphate on two crystallized aluminum oxides, pseudo-boehmite (pseudo-gamma-AIOOH) and alpha-Al2O3, was studied. The adsorption experiments were carried out in 0.01 M KNO3 solutions at pH 4 and 6, respectively. Adsorption densities were calculated to evaluate the phosphate adsorption affinity for the two aluminum oxides. To better understand the effect of surface properties on the adsorption behavior of phosphate, the surface structure and properties were investigated with X-ray diffraction, N-2 adsorption-desorption, electron microscope observation and surface acid-base titrations. The results from adsorption isotherms showed that at both pH 4 and 6, pseudo-gamma-AIOOH exhibited greater adsorption capacity than alpha-Al2O3. For both pseudo-gamma-AlOOH and alpha-AL(2)O(3), the adsorbed amount of phosphate at pH 4 was higher than that at pH 6. Adsorption density calculation indicated that alpha-Al2O3 had greater affinity for phosphate than pseudo-gamma-AlOOH. Information gained from examinations of surface properties revealed that the specific surface area played an important role on adsorption capacity, while the acidity of surface aluminol groups evaluated from acid-base titration curves contributed more to adsorption affinity and consequently the adsorption density. (c) 2007 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000245072500012 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22534]  |
| 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 | Yang Xiaofang,Wang Dongsheng,Sun Zhongxi,et al. Adsorption of phosphate at the aluminum (hydr)oxides-water interface: Role of the surface acid-base properties[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2007,297(1):84-90. |
| APA | Yang Xiaofang,Wang Dongsheng,Sun Zhongxi,&Tang Hongxiao.(2007).Adsorption of phosphate at the aluminum (hydr)oxides-water interface: Role of the surface acid-base properties.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,297(1),84-90. |
| MLA | Yang Xiaofang,et al."Adsorption of phosphate at the aluminum (hydr)oxides-water interface: Role of the surface acid-base properties".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 297.1(2007):84-90. |
入库方式： OAI收割
来源：生态环境研究中心
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