EXAFS study of adsorbed Cu(II) on fly ashes with different residual carbon contents

Chien Jung Lin, Juu-En Chang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This work studied the speciation of copper species adsorbed onto the surface of fly ash using X-ray absorption spectroscopy (XAS). Experimental results verified that the chemical bond between Cu(II) and the surface of the fly ash was Cu-O. The data set was optimally fitted into the two atomic shells: the first shell containing O atoms and the second shell containing Cu atoms. The extended X-ray absorption fine structure (EXAFS) data also show that, in the first shell, about 2.03-2.41 nearest oxygen atoms surround the center Cu atom with a Cu-O bond distance of 1.96-1.99 Å. The results further demonstrated that the bond distance slightly increased with an increasing carbon content of the fly ash.

Original languageEnglish
Pages (from-to)115-121
Number of pages7
JournalChemosphere
Volume46
Issue number1
DOIs
Publication statusPublished - 2002 Apr 23

Fingerprint

Coal Ash
X ray absorption
Fly ash
fly ash
Carbon
X-Rays
shell
Atoms
carbon
X-Ray Absorption Spectroscopy
X ray absorption spectroscopy
Copper
Chemical bonds
atomic absorption spectroscopy
Oxygen
X-ray spectroscopy
copper
oxygen

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

Cite this

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title = "EXAFS study of adsorbed Cu(II) on fly ashes with different residual carbon contents",
abstract = "This work studied the speciation of copper species adsorbed onto the surface of fly ash using X-ray absorption spectroscopy (XAS). Experimental results verified that the chemical bond between Cu(II) and the surface of the fly ash was Cu-O. The data set was optimally fitted into the two atomic shells: the first shell containing O atoms and the second shell containing Cu atoms. The extended X-ray absorption fine structure (EXAFS) data also show that, in the first shell, about 2.03-2.41 nearest oxygen atoms surround the center Cu atom with a Cu-O bond distance of 1.96-1.99 {\AA}. The results further demonstrated that the bond distance slightly increased with an increasing carbon content of the fly ash.",
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EXAFS study of adsorbed Cu(II) on fly ashes with different residual carbon contents. / Lin, Chien Jung; Chang, Juu-En.

In: Chemosphere, Vol. 46, No. 1, 23.04.2002, p. 115-121.

Research output: Contribution to journalArticle

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AB - This work studied the speciation of copper species adsorbed onto the surface of fly ash using X-ray absorption spectroscopy (XAS). Experimental results verified that the chemical bond between Cu(II) and the surface of the fly ash was Cu-O. The data set was optimally fitted into the two atomic shells: the first shell containing O atoms and the second shell containing Cu atoms. The extended X-ray absorption fine structure (EXAFS) data also show that, in the first shell, about 2.03-2.41 nearest oxygen atoms surround the center Cu atom with a Cu-O bond distance of 1.96-1.99 Å. The results further demonstrated that the bond distance slightly increased with an increasing carbon content of the fly ash.

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