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EFFECT OF COPPER AND CADMIMUM BINDING ON FLOCCULATION OF FERRIC OXIDE PARTICLES.

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Title: EFFECT OF COPPER AND CADMIMUM BINDING ON FLOCCULATION OF FERRIC OXIDE PARTICLES.
Authors: Subramaniam, Kavitha, Yiacoumi, Sotira, Tsouris, Costas
Source: Separation Science & Technology. 4/1/99, Vol. 34 Issue 6/7, p1301. 18p.
Subjects: Copper, Cadmium, Flocculation, Ferric oxide
Abstract: The sorption of copper and cadmium ions from aqueous solutions by ferric oxide particles was studied using batch equilibrium and kinetic experiments. The sorption process was found to be pH dependent, with the uptake increasing at high pH values. An increase in equilibrium pH was observed when the initial pH was in the acidic range, and a decrease from initial values was observed in the basic range, in the case of both copper and cadmium sorption. The former phenomenon is due to competition between metal and proton binding, and the latter is due to precipitation mechanisms at high initial pH values. A large increase in the zeta potential of the particles from baseline values was observed during equilibrium sorption. This increase occurs as a result of surface charge neutralization due to metal ion uptake. Particle destabilization appears to occur as a result of metal ion sorption. Kinetic experiments indicate that the uptake of copper by ferric oxide particles is a slow process. The pH histories were similar to those obtained in the sorption equilibrium experiments. Changes in the size distribution of the ferric oxide particles due to aggregate formation during uptake of ions were observed in the kinetic studies. These findings indicate a potential role of metal ion uptake in particle flocculation kinetics through alteration of the surface electrostatic potential. [ABSTRACT FROM AUTHOR]
Copyright of Separation Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 7429436
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PubType: Academic Journal
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  Data: EFFECT OF COPPER AND CADMIMUM BINDING ON FLOCCULATION OF FERRIC OXIDE PARTICLES.
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  Data: <searchLink fieldCode="AR" term="%22Subramaniam%2C+Kavitha%22">Subramaniam, Kavitha</searchLink><br /><searchLink fieldCode="AR" term="%22Yiacoumi%2C+Sotira%22">Yiacoumi, Sotira</searchLink><br /><searchLink fieldCode="AR" term="%22Tsouris%2C+Costas%22">Tsouris, Costas</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Separation+Science+%26+Technology%22">Separation Science & Technology</searchLink>. 4/1/99, Vol. 34 Issue 6/7, p1301. 18p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Copper%22">Copper</searchLink><br /><searchLink fieldCode="DE" term="%22Cadmium%22">Cadmium</searchLink><br /><searchLink fieldCode="DE" term="%22Flocculation%22">Flocculation</searchLink><br /><searchLink fieldCode="DE" term="%22Ferric+oxide%22">Ferric oxide</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The sorption of copper and cadmium ions from aqueous solutions by ferric oxide particles was studied using batch equilibrium and kinetic experiments. The sorption process was found to be pH dependent, with the uptake increasing at high pH values. An increase in equilibrium pH was observed when the initial pH was in the acidic range, and a decrease from initial values was observed in the basic range, in the case of both copper and cadmium sorption. The former phenomenon is due to competition between metal and proton binding, and the latter is due to precipitation mechanisms at high initial pH values. A large increase in the zeta potential of the particles from baseline values was observed during equilibrium sorption. This increase occurs as a result of surface charge neutralization due to metal ion uptake. Particle destabilization appears to occur as a result of metal ion sorption. Kinetic experiments indicate that the uptake of copper by ferric oxide particles is a slow process. The pH histories were similar to those obtained in the sorption equilibrium experiments. Changes in the size distribution of the ferric oxide particles due to aggregate formation during uptake of ions were observed in the kinetic studies. These findings indicate a potential role of metal ion uptake in particle flocculation kinetics through alteration of the surface electrostatic potential. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Separation Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1081/SS-100100710
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 18
        StartPage: 1301
    Subjects:
      – SubjectFull: Copper
        Type: general
      – SubjectFull: Cadmium
        Type: general
      – SubjectFull: Flocculation
        Type: general
      – SubjectFull: Ferric oxide
        Type: general
    Titles:
      – TitleFull: EFFECT OF COPPER AND CADMIMUM BINDING ON FLOCCULATION OF FERRIC OXIDE PARTICLES.
        Type: main
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            NameFull: Subramaniam, Kavitha
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            NameFull: Yiacoumi, Sotira
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            NameFull: Tsouris, Costas
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            – D: 01
              M: 04
              Text: 4/1/99
              Type: published
              Y: 1999
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              Value: 01496395
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              Value: 34
            – Type: issue
              Value: 6/7
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            – TitleFull: Separation Science & Technology
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