Linked Life Data

14551957

Source:http://linkedlifedata.com/resource/pubmed/id/14551957

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2003-10-13
pubmed:abstractText
Microscopic structures of Zn(II) surface complexes adsorbed at a delta-MnO2-water interface were studied using extended X-ray absorption fine structure (EXAFS) spectroscopy. In a 0.1 mol/L NaNO3 solution of pH 5.50, Zn(II) was adsorbed onto the solid surface in the form of octahedral hydrous Zn(II) ions. The octahedral Zn(II) was linked to the structural unit of octahedral MnO6 of the delta-MnO2 surface by sharing the O atoms. The average bond length of RZn-O was (2.071 +/- 0.007)A (n = 3) and the Zn-Mn atomic distance was (3.528 +/- 0.006) A (n = 3), which corresponded to a corner-sharing linkage adsorption mode (weaker adsorption). Macroscopic adsorption-desorption isotherm experiments showed that, in contrast to that of Zn-manganite, adsorption of Zn(II) on delta-MnO2 was highly reversible and no apparent adsorption hysteresis was observed. EXAFS results indicated that the microscopic mechanism for the high adsorption reversibility was corresponded to the weak adsorption sites of corner sharing linkage between the adsorbate and adsorbent polyhedra.
pubmed:language
chi
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0250-3301
pubmed:author
pubmed:issnType
Print
pubmed:volume
24
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
54-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
[EXAFS studies on adsorption-desorption mechanism of Zn at delta-MnO2-water interface].
pubmed:affiliation
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
pubmed:publicationType
Journal Article, English Abstract, Research Support, Non-U.S. Gov't