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

H. A. Elliott; C. P. Huang

doi:10.1016/0021-9797(79)90005-5

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

H. A. Elliott
, C. P. Huang

Agricultural & Biological Engineering

Research output: Contribution to journal › Article › peer-review

126 Scopus citations

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 pH_zpc 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 language	English (US)
Pages (from-to)	29-45
Number of pages	17
Journal	Journal of Colloid And Interface Science
Volume	70
Issue number	1
DOIs	https://doi.org/10.1016/0021-9797(79)90005-5
State	Published - Jun 1 1979

All Science Journal Classification (ASJC) codes

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

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10.1016/0021-9797(79)90005-5

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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.",

author = "Elliott, \{H. A.\} and Huang, \{C. P.\}",

note = "Funding Information: This research work was supported by a grant, ENG 77-27379, from the Water Resources, Urban and Environmental Engineering Program of the National Science Foundation. We would like to thank Y. T. Lin and Raulf Iler for many useful suggestions and discussions regarding the mechanism of CuNTA-adsorption. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1979",

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doi = "10.1016/0021-9797(79)90005-5",

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AU - Elliott, H. A.

AU - Huang, C. P.

N1 - Funding Information: This research work was supported by a grant, ENG 77-27379, from the Water Resources, Urban and Environmental Engineering Program of the National Science Foundation. We would like to thank Y. T. Lin and Raulf Iler for many useful suggestions and discussions regarding the mechanism of CuNTA-adsorption. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1979/6/1

Y1 - 1979/6/1

N2 - 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.

AB - 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

Abstract

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