Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide
文献类型：期刊论文
| 作者 | Liu, Ruiping ; Liu, Huijuan ; Qiang, Zhimin ; Qu, Jiuhui ; Li, Guibai ; Wang, Dongsheng |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2009-05-15 |
| 卷号 | 331期号:2页码:275-280 |
| 关键词 | Calcium ions Surface characteristics Adsorption delta MnO(2) Humic acid Arsenic |
| 中文摘要 | The effects of calcium ions (Ca(2+)) on the surface characteristics and adsorptive properties of hydrous manganese dioxide (delta MnO(2)), taking arsenic and humic acid as model pollutants, were systematically investigated. The FTIR spectra and SEM/EDX analyses indicate coordination between Ca(2+) and the surface hydroxyls ( Mn-OH) of delta MnO(2), which leads to an increase of the surface zeta potential. Ca(2+) can facilitate delta MnO(2) aggregation, as indicated by the particle size distribution (PSD) and on-line flocculating index (FI). The variation of delta MnO(2) surface characteristics that is induced by Ca(2+) enhances the adsorption of humic acid (HA) and arsenic onto delta MnO(2). The adsorption of HA is enhanced more significantly by Ca(2+) than that of arsenic, which is positively related to the coordination strength between Ca(2+) and individual pollutants. The SEM/EDX analysis shows the formation of Ca-HA complexes, which have a higher affinity for delta MnO(2) than HA. The bridging effect of Ca(2+) plays a major role in enhancing HA adsorption onto delta MnO(2). Due to different interactions between Ca(2+) and pollutants, the adsorption mechanism is pollutant-dependent in the presence of Ca(2+). (C) 2008 Elsevier Inc. All rights reserved. |
| WOS记录号 | WOS:000263335700003 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21669]  |
| 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 | Liu, Ruiping,Liu, Huijuan,Qiang, Zhimin,et al. Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2009,331(2):275-280. |
| APA | Liu, Ruiping,Liu, Huijuan,Qiang, Zhimin,Qu, Jiuhui,Li, Guibai,&Wang, Dongsheng.(2009).Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide.JOURNAL OF COLLOID AND INTERFACE SCIENCE,331(2),275-280. |
| MLA | Liu, Ruiping,et al."Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide".JOURNAL OF COLLOID AND INTERFACE SCIENCE 331.2(2009):275-280. |
入库方式： OAI收割
来源：生态环境研究中心
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