Effects of Ca on the distribution, structure and morphology of aluminum species in polyaluminum chloride
文献类型：期刊论文
| 作者 | Zhao, HZ; Ge, XP; Luan, ZK; Jiang, ZP |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2004 |
| 卷号 | 49期号:12页码:1241-1244 |
| 关键词 | Al-13 species distribution of Al species structure and morphology polyaluminum chloride containing Ca |
| 英文摘要 | The flocculation efficiency of polyaluminum chloride (PAC) is closely related to the distribution and structure of its Al species, and Al-13 is the optimal species in PAC for flocculation. A series of PAC containing Ca was prepared by adding Ca before and after the basifying reaction. The effects of Ca on the Al species were studied by (27) Al nuclear magnetic resonance (NMR) and atomic force microscope (AFM) techniques. The experimental results show that the introduction of Ca increases the content of Al-m and Al-13 in PAC and decreases their chemical shifts in NMR spectra due to the electric repulsion between the positive Ca species and Al species and the formation of Al-O-Ca complexes. With the rise of Ca/Al molar ratio, the Al species in PAC tend to scatter. It is observed that the formerly branch-aggregated clusters are tending to form granule-aggregated ones whose diameter gets smaller and smaller, and the floccule aggregates are formed at a higher Ca/Al molar ratio. The introduction of Ca to PAC, which increases the Al-13 content, is certainly to enhance the flocculation efficiency of PAC in water treatment. |
| 研究领域[WOS] | Science & Technology - Other Topics |
| WOS记录号 | WOS:000223586500008 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23518]  |
| 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 | Zhao, HZ,Ge, XP,Luan, ZK,et al. Effects of Ca on the distribution, structure and morphology of aluminum species in polyaluminum chloride[J]. CHINESE SCIENCE BULLETIN,2004,49(12):1241-1244. |
| APA | Zhao, HZ,Ge, XP,Luan, ZK,&Jiang, ZP.(2004).Effects of Ca on the distribution, structure and morphology of aluminum species in polyaluminum chloride.CHINESE SCIENCE BULLETIN,49(12),1241-1244. |
| MLA | Zhao, HZ,et al."Effects of Ca on the distribution, structure and morphology of aluminum species in polyaluminum chloride".CHINESE SCIENCE BULLETIN 49.12(2004):1241-1244. |
入库方式： OAI收割
来源：生态环境研究中心
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