X-Ray Absorption Spectroscopic Evidence for the Formation of Pb(II) Inner-Sphere Adsorption Complexes and Precipitates at the Alkaline Soil-Water Interface

doi:10.3964/j.issn.1000-0593(2011)02-0560-05

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	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-jing 1,2; Luo Yong-ming 1; Huang Peng 3; Hu Tian-dou 4; Xie Ya-ning 4; Wu Zi-yu 4; Shi Xue-fa 2; Luo, YM (reprint author), Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China
刊名	SPECTROSCOPY AND SPECTRAL ANALYSIS
	2011-02-01
卷号	31 期号:2 页码:560-564
关键词	Pb Inner-sphere Sorption Precipitation Outer-sphere Sorption Alkaline Soil Xafs
ISSN号	1000-0593
DOI	10.3964/j.issn.1000-0593(2011)02-0560-05
文献子类	Article
英文摘要	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).
学科主题	Spectroscopy
URL标识	查看原文
语种	英语
WOS记录号	WOS:000287263400062
公开日期	2012-07-03
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/11546]
专题	海洋研究所_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.