The effect of Si and Fe impurities on the removal of Cu2+ and Co2+ from Co/Cu aqueous solutions using natural clinoptilolite as an ion-exchanger

D. W. Nyembe; B. B. Mamba; A. F. Mulaba-Bafubiandi

doi:10.5004/dwt.2010.1412

The effect of Si and Fe impurities on the removal of Cu²⁺ and Co²⁺ from Co/Cu aqueous solutions using natural clinoptilolite as an ion-exchanger

D. W. Nyembe, B. B. Mamba, A. F. Mulaba-Bafubiandi

Metallurgy

University of Johannesburg

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

5 Citations (Scopus)

Abstract

In this study, the impact of Si and Fe impurities on the removal of Cu²⁺ and Co²⁺ from aqueous solutions was investigated using Southern African clinoptilolite as an ion-exchanger in a multicomponent system. The extent of the cation-exchange process was investigated, whereby mixed Co/Cu aqueous solutions of concentrations 0.0020 M, 0.0698 M and 0.2000 M of Co²⁺ and Cu²⁺ were analyzed using atomic absorption spectroscopy (AAS). These Co/Cu mixed solutions were used as "control" solutions in determining the impact of the presence of impurities such as SiO₂ and FeCl₂ in mixed Co/Cu aqueous solutions on the removal efficiencies of copper and cobalt from the solutions. It was found that both SiO₂ and FeCl₂ greatly reduced the removal efficiency of Cu²⁺, especially where there were high amounts of SiO₂ in the Co/Cu solution. There was however a significant enhancement in the removal efficiency of Co²⁺ with increased concentration of SiO₂.

Original language	English
Pages (from-to)	335-345
Number of pages	11
Journal	Desalination and Water Treatment
Volume	21
Issue number	1-3
DOIs	https://doi.org/10.5004/dwt.2010.1412
Publication status	Published - Sept 2010

Keywords

Clinoptilolite
Cobalt
Copper
Ion-exchange
Si/Fe impurities

ASJC Scopus subject areas

Water Science and Technology
Ocean Engineering
Pollution

Access to Document

10.5004/dwt.2010.1412

Cite this

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title = "The effect of Si and Fe impurities on the removal of Cu2+ and Co2+ from Co/Cu aqueous solutions using natural clinoptilolite as an ion-exchanger",

abstract = "In this study, the impact of Si and Fe impurities on the removal of Cu2+ and Co2+ from aqueous solutions was investigated using Southern African clinoptilolite as an ion-exchanger in a multicomponent system. The extent of the cation-exchange process was investigated, whereby mixed Co/Cu aqueous solutions of concentrations 0.0020 M, 0.0698 M and 0.2000 M of Co2+ and Cu2+ were analyzed using atomic absorption spectroscopy (AAS). These Co/Cu mixed solutions were used as {"}control{"} solutions in determining the impact of the presence of impurities such as SiO2 and FeCl2 in mixed Co/Cu aqueous solutions on the removal efficiencies of copper and cobalt from the solutions. It was found that both SiO2 and FeCl2 greatly reduced the removal efficiency of Cu2+, especially where there were high amounts of SiO2 in the Co/Cu solution. There was however a significant enhancement in the removal efficiency of Co2+ with increased concentration of SiO2.",

keywords = "Clinoptilolite, Cobalt, Copper, Ion-exchange, Si/Fe impurities",

author = "Nyembe, {D. W.} and Mamba, {B. B.} and Mulaba-Bafubiandi, {A. F.}",

year = "2010",

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language = "English",

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T1 - The effect of Si and Fe impurities on the removal of Cu2+ and Co2+ from Co/Cu aqueous solutions using natural clinoptilolite as an ion-exchanger

AU - Nyembe, D. W.

AU - Mamba, B. B.

AU - Mulaba-Bafubiandi, A. F.

PY - 2010/9

Y1 - 2010/9

N2 - In this study, the impact of Si and Fe impurities on the removal of Cu2+ and Co2+ from aqueous solutions was investigated using Southern African clinoptilolite as an ion-exchanger in a multicomponent system. The extent of the cation-exchange process was investigated, whereby mixed Co/Cu aqueous solutions of concentrations 0.0020 M, 0.0698 M and 0.2000 M of Co2+ and Cu2+ were analyzed using atomic absorption spectroscopy (AAS). These Co/Cu mixed solutions were used as "control" solutions in determining the impact of the presence of impurities such as SiO2 and FeCl2 in mixed Co/Cu aqueous solutions on the removal efficiencies of copper and cobalt from the solutions. It was found that both SiO2 and FeCl2 greatly reduced the removal efficiency of Cu2+, especially where there were high amounts of SiO2 in the Co/Cu solution. There was however a significant enhancement in the removal efficiency of Co2+ with increased concentration of SiO2.

AB - In this study, the impact of Si and Fe impurities on the removal of Cu2+ and Co2+ from aqueous solutions was investigated using Southern African clinoptilolite as an ion-exchanger in a multicomponent system. The extent of the cation-exchange process was investigated, whereby mixed Co/Cu aqueous solutions of concentrations 0.0020 M, 0.0698 M and 0.2000 M of Co2+ and Cu2+ were analyzed using atomic absorption spectroscopy (AAS). These Co/Cu mixed solutions were used as "control" solutions in determining the impact of the presence of impurities such as SiO2 and FeCl2 in mixed Co/Cu aqueous solutions on the removal efficiencies of copper and cobalt from the solutions. It was found that both SiO2 and FeCl2 greatly reduced the removal efficiency of Cu2+, especially where there were high amounts of SiO2 in the Co/Cu solution. There was however a significant enhancement in the removal efficiency of Co2+ with increased concentration of SiO2.

KW - Clinoptilolite

KW - Cobalt

KW - Copper

KW - Ion-exchange

KW - Si/Fe impurities

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DO - 10.5004/dwt.2010.1412

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