Surface chemical heterogeneity of oxidized carbon particles

C. A. Leon y Leon, V. Calemma, L. R. Radovic

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The effects of pH, or surface chemistry and of porosity on the heterogeneity of immersed Saran carbons was investigated by film flotation. Even in the presence of methanol, higher pH values were found to enhance the surface hydrophilicity of carbons owing to the dissociation of oxygen functional groups. For carbons with similar oxygen contents, higher CO/CO2 evolution ratios (i.e., lower acidities) led to diminished pH effects, and to a more hydrophilic response at low pH values. Porosity only appears to affect the rate at which equilibrium flotation is attained.

Original languageEnglish (US)
Pages (from-to)30-31
Number of pages2
JournalExtended Abstracts and Program - Biennial Conference on Carbon
StatePublished - Jan 1 1991
Event20th Biennial Conference on Carbon - Santa Barbara, CA, USA
Duration: Jun 23 1991Jun 28 1991

Fingerprint

Flotation
Carbon
Porosity
pH effects
Oxygen
Hydrophilicity
Surface chemistry
Acidity
Functional groups
Methanol

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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abstract = "The effects of pH, or surface chemistry and of porosity on the heterogeneity of immersed Saran carbons was investigated by film flotation. Even in the presence of methanol, higher pH values were found to enhance the surface hydrophilicity of carbons owing to the dissociation of oxygen functional groups. For carbons with similar oxygen contents, higher CO/CO2 evolution ratios (i.e., lower acidities) led to diminished pH effects, and to a more hydrophilic response at low pH values. Porosity only appears to affect the rate at which equilibrium flotation is attained.",
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Surface chemical heterogeneity of oxidized carbon particles. / Leon y Leon, C. A.; Calemma, V.; Radovic, L. R.

In: Extended Abstracts and Program - Biennial Conference on Carbon, 01.01.1991, p. 30-31.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Surface chemical heterogeneity of oxidized carbon particles

AU - Leon y Leon, C. A.

AU - Calemma, V.

AU - Radovic, L. R.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - The effects of pH, or surface chemistry and of porosity on the heterogeneity of immersed Saran carbons was investigated by film flotation. Even in the presence of methanol, higher pH values were found to enhance the surface hydrophilicity of carbons owing to the dissociation of oxygen functional groups. For carbons with similar oxygen contents, higher CO/CO2 evolution ratios (i.e., lower acidities) led to diminished pH effects, and to a more hydrophilic response at low pH values. Porosity only appears to affect the rate at which equilibrium flotation is attained.

AB - The effects of pH, or surface chemistry and of porosity on the heterogeneity of immersed Saran carbons was investigated by film flotation. Even in the presence of methanol, higher pH values were found to enhance the surface hydrophilicity of carbons owing to the dissociation of oxygen functional groups. For carbons with similar oxygen contents, higher CO/CO2 evolution ratios (i.e., lower acidities) led to diminished pH effects, and to a more hydrophilic response at low pH values. Porosity only appears to affect the rate at which equilibrium flotation is attained.

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EP - 31

JO - Extended Abstracts and Program - Biennial Conference on Carbon

JF - Extended Abstracts and Program - Biennial Conference on Carbon

SN - 0160-7464

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