The adsorption characteristics of Cu(II) in the presence of chelating agents

Research output: Contribution to journalArticle

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Abstract

The adsorption characteristics of Cu(II) in the presence of chelating agents was investigated in the laboratory. The results showed that the presence of chelating agents improved the extent of Cu(II) adsorption, although ligand:Cu(II) ratio = 1:1 seemed to be important to assure optimum Cu(II) adsorption, at least in the Cu(II)-NTA-γ-Al2O3 system. Electrostatic interaction appeared to be an important mechanism for complexed Cu(II) adsorption. However, a finite adsorption of Cu(II) complexes of NTA, glycine, and aspartic acid was observed at the pHzpc of γ-Al2O3. This suggests the presence of specific chemical interaction. The adsorbed Cu(II) species in the presence of chelating agents, such as NTA, is the complexed form, i.e., CuNTA-. A model has been proposed to qualitatively explain the attachment of CuNTA- species onto γ-Al2O3 surface.

Original languageEnglish (US)
Pages (from-to)29-45
Number of pages17
JournalJournal of Colloid And Interface Science
Volume70
Issue number1
DOIs
StatePublished - Jun 1 1979

Fingerprint

Chelating Agents
Chelation
Adsorption
adsorption
aspartic acid
acids
glycine
Coulomb interactions
Aspartic Acid
Glycine
attachment
Amino acids
Ligands
interactions
electrostatics
ligands
Acids

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Cite this

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title = "The adsorption characteristics of Cu(II) in the presence of chelating agents",
abstract = "The adsorption characteristics of Cu(II) in the presence of chelating agents was investigated in the laboratory. The results showed that the presence of chelating agents improved the extent of Cu(II) adsorption, although ligand:Cu(II) ratio = 1:1 seemed to be important to assure optimum Cu(II) adsorption, at least in the Cu(II)-NTA-γ-Al2O3 system. Electrostatic interaction appeared to be an important mechanism for complexed Cu(II) adsorption. However, a finite adsorption of Cu(II) complexes of NTA, glycine, and aspartic acid was observed at the pHzpc of γ-Al2O3. This suggests the presence of specific chemical interaction. The adsorbed Cu(II) species in the presence of chelating agents, such as NTA, is the complexed form, i.e., CuNTA-. A model has been proposed to qualitatively explain the attachment of CuNTA- species onto γ-Al2O3 surface.",
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The adsorption characteristics of Cu(II) in the presence of chelating agents. / Elliott, Herschel Adams; Huang, C. P.

In: Journal of Colloid And Interface Science, Vol. 70, No. 1, 01.06.1979, p. 29-45.

Research output: Contribution to journalArticle

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