EXAFS studies on adsorption-desorption reversibility at manganese oxides-water interfaces I. Irreversible adsorption of zinc onto manganite (gamma-MnOOH)
Pan, G; Qin, YW; Li, XL; Hu, TD; Wu, ZY; Xie, YN; Hu TD(胡天斗); Wu ZY(吴自玉); Xie YN(谢亚宁)
刊名JOURNAL OF COLLOID AND INTERFACE SCIENCE
2004
卷号271期号:1页码:#REF!
关键词zinc manganite EXAFS adsorption-desorption adsorption reversibility metastable-equilibrium adsorption
学科分类Chemistry
DOI10.1016/j.jcis.2003.11.028
通讯作者Pan, G (reprint author), Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, POB 2871, Beijing 100085, Peoples R China.
文章类型Article
英文摘要Microscopic structures of Zn(II) surface complexes adsorbed at the manganite (gamma-MnOOH)-water interface were studied using extended X-ray absorption fine structure (EXAFS) spectroscopy. Quantitative analysis of the first sphere showed that, in a 0.1 M NaNO(3) solution of pH 7.5, Zn(II) was adsorbed as a mixture of tetrahedral and octahedral structure (ZnO(4,6) polyhedra) and the average Zn-O distance was 2.00 +/- 0.01 Angstrom. EXAFS analysis of the second sphere showed that two typical atomic Zn-Mn distances of 3.07 +/- 0.01 and 3.52 +/- 0.02 Angstrom existed in the surface complexes, indicating that there were two types of linkage, i.e., the edge-linkage of high affinity and the corner-linkage of low affinity, between the ZnO(4,6) polyhedra and the MnO(6) octahedra of the manganite. Macroscopic adsorption-desorption experiments showed that adsorption of Zn(II) onto manganite was largely irreversible and the stronger edge-linkage mode was found to be responsible for the adsorption irreversibility. This result provided direct evidence from the molecular level for the basic hypothesis of the metastable-equilibrium adsorption (MEA) theory that adsorption density is not a thermodynamic state variable because a given value of adsorption density could have different values of chemical potential, depending on the proportion between the edge and corner linkage modes. (C) 2003 Elsevier Inc. All rights reserved.
类目[WOS]Chemistry, Physical
收录类别SCI
WOS记录号WOS:000188778600004
引用统计
被引频次:71[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225595
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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Pan, G,Qin, YW,Li, XL,et al. EXAFS studies on adsorption-desorption reversibility at manganese oxides-water interfaces I. Irreversible adsorption of zinc onto manganite (gamma-MnOOH)[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2004,271(1):#REF!.
APA Pan, G.,Qin, YW.,Li, XL.,Hu, TD.,Wu, ZY.,...&谢亚宁.(2004).EXAFS studies on adsorption-desorption reversibility at manganese oxides-water interfaces I. Irreversible adsorption of zinc onto manganite (gamma-MnOOH).JOURNAL OF COLLOID AND INTERFACE SCIENCE,271(1),#REF!.
MLA Pan, G,et al."EXAFS studies on adsorption-desorption reversibility at manganese oxides-water interfaces I. Irreversible adsorption of zinc onto manganite (gamma-MnOOH)".JOURNAL OF COLLOID AND INTERFACE SCIENCE 271.1(2004):#REF!.
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