| X-Ray Absorption Spectroscopic Evidence for the Formation of Pb(II) Inner-Sphere Adsorption Complexes and Precipitates at the Alkaline Soil-Water Interface | |
| Hu Ning-jing1,2; Luo Yong-ming1; Huang Peng3; Hu Tian-dou4; Xie Ya-ning4; Wu Zi-yu4; Shi Xue-fa2; Luo, YM (reprint author), Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China | |
| 2011-02-01 | |
| 发表期刊 | SPECTROSCOPY AND SPECTRAL ANALYSIS
 |
| ISSN | 1000-0593 |
| 卷号 | 31期号:2页码:560-564 |
| 文章类型 | Article |
| 摘要 | Adsorption mechanisms of Pb on soil with high CaCO(3) content were investigated by combined batch sorption and X-ray absorption fine structure (XAFS). Date from the batch equilibrium studies showed that Pb sorption was nonlinear and was well fitted to Langmiur isotherm. The XAFS data indicated that Pb could be adsorbed via the inner-sphere complex, the precipitation of calcium carbonate containing Pb (PbCaCO(3)), and outer-sphere Pb sorption complex. The formations of inner-sphere complexes and PbCaCO(3) implied strong metal interactions with the surfaces the mechanistic reason for the affinity of Pb for CaCO(3) as observed in macroscopic studies. At low metal concentration, 500 mg . L(-1) of initial Pb, radial distance of the first-shell Pb-O (R(1)) was 0. 169 2 nm, however, at 1 000 mg . L(-1) of initial Pb, the R(1) was 0. 166 8 nm. These revealed that the percentage of inner-sphere complexes increased when the initial Pb was increased from 500 to 1 000 mg . L(-1).; Adsorption mechanisms of Pb on soil with high CaCO(3) content were investigated by combined batch sorption and X-ray absorption fine structure (XAFS). Date from the batch equilibrium studies showed that Pb sorption was nonlinear and was well fitted to Langmiur isotherm. The XAFS data indicated that Pb could be adsorbed via the inner-sphere complex, the precipitation of calcium carbonate containing Pb (PbCaCO(3)), and outer-sphere Pb sorption complex. The formations of inner-sphere complexes and PbCaCO(3) implied strong metal interactions with the surfaces the mechanistic reason for the affinity of Pb for CaCO(3) as observed in macroscopic studies. At low metal concentration, 500 mg . L(-1) of initial Pb, radial distance of the first-shell Pb-O (R(1)) was 0. 169 2 nm, however, at 1 000 mg . L(-1) of initial Pb, the R(1) was 0. 166 8 nm. These revealed that the percentage of inner-sphere complexes increased when the initial Pb was increased from 500 to 1 000 mg . L(-1). |
| 关键词 | Pb Inner-sphere Sorption Precipitation Outer-sphere Sorption Alkaline Soil Xafs |
| 学科领域 | Spectroscopy |
| DOI | 10.3964/j.issn.1000-0593(2011)02-0560-05 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000287263400062 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/11545 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Luo, YM (reprint author), Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China 2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266072, Peoples R China 4.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu Ning-jing,Luo Yong-ming,Huang Peng,et al. X-Ray Absorption Spectroscopic Evidence for the Formation of Pb(II) Inner-Sphere Adsorption Complexes and Precipitates at the Alkaline Soil-Water Interface[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2011,31(2):560-564. |
| APA | Hu Ning-jing.,Luo Yong-ming.,Huang Peng.,Hu Tian-dou.,Xie Ya-ning.,...&Luo, YM .(2011).X-Ray Absorption Spectroscopic Evidence for the Formation of Pb(II) Inner-Sphere Adsorption Complexes and Precipitates at the Alkaline Soil-Water Interface.SPECTROSCOPY AND SPECTRAL ANALYSIS,31(2),560-564. |
| MLA | Hu Ning-jing,et al."X-Ray Absorption Spectroscopic Evidence for the Formation of Pb(II) Inner-Sphere Adsorption Complexes and Precipitates at the Alkaline Soil-Water Interface".SPECTROSCOPY AND SPECTRAL ANALYSIS 31.2(2011):560-564. |
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