A study of sodium silicate in aqueous solution and sorbed by synthetic magnetite using in situ ATR-FTIR spectroscopy
文献类型：期刊论文
| 作者 | Yang, Xiaofang ; Roonasi, Payman ; Holmgren, Allan |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2008-12-01 |
| 卷号 | 328期号:1页码:41-47 |
| 关键词 | Sodium silicate Magnetite ATR-FTIR Sorption Desorption |
| 英文摘要 | The sorption of sodium silicate by synthetic magnetite (Fe(3)O(4)) at different pH conditions (pH 7-11) and initial silicate concentrations (1 x 10(-3) and 10 x 10(-3) mol L(-1)) was studied using in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. The analysis of infrared spectra of sodium silicate in solution as well as adsorbed on magnetite nano-particles clearly showed the evolution of different silicate species depending on pH and silica concentration. The silicate concentration studied (10 x 10(-3) mol L(-1)) contained polymeric or condensed silicate species at lower pH as well as monomers at high pH, as evident from infrared spectra. Condensation of monomers resulted in an increased intensity of absorptions in the high frequency part (>1050 cm(-1)) of the spectral region, which contains information about both silicate in solution and sorbed silicate viz. 1300 cm(-1)-850 cm(-1). In the pH range studied, infrared spectra Of sorbed silicate and sorbed silicate during desorption both indicated the presence of different types of surface complexes at the magnetite surface. The sorption mechanism proposed is in accordance with a ligand exchange reaction where both monodentate and bidentate complexes could exist at low surface loading level, the relative proportion of the complexes being due to both pH and concentration in solution. Oligomerization Occurred on the magnetite surface at higher surface loading. (C) 2008 Published by Elsevier Inc. |
| WOS记录号 | WOS:000261042800008 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21903]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yang, Xiaofang,Roonasi, Payman,Holmgren, Allan. A study of sodium silicate in aqueous solution and sorbed by synthetic magnetite using in situ ATR-FTIR spectroscopy[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2008,328(1):41-47. |
| APA | Yang, Xiaofang,Roonasi, Payman,&Holmgren, Allan.(2008).A study of sodium silicate in aqueous solution and sorbed by synthetic magnetite using in situ ATR-FTIR spectroscopy.JOURNAL OF COLLOID AND INTERFACE SCIENCE,328(1),41-47. |
| MLA | Yang, Xiaofang,et al."A study of sodium silicate in aqueous solution and sorbed by synthetic magnetite using in situ ATR-FTIR spectroscopy".JOURNAL OF COLLOID AND INTERFACE SCIENCE 328.1(2008):41-47. |
入库方式： OAI收割
来源：生态环境研究中心
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