Co-Adsorption of Alkylphenols and a Non-Ionic Surfactant onto Bentonite
The influence of a non-ionic surfactant on the adsorption behaviour of alkylphenols onto bentonite was studied via measurements of their adsorption isotherms in the absence and presence of various concentrations of the surfactant. Irrespective of the presence of the surfactant, the alkylphenols were...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publications
2006-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361707781422013 |
| Summary: | The influence of a non-ionic surfactant on the adsorption behaviour of alkylphenols onto bentonite was studied via measurements of their adsorption isotherms in the absence and presence of various concentrations of the surfactant. Irrespective of the presence of the surfactant, the alkylphenols were always adsorbed by the same mechanism. However, on adding the non-ionic surfactant TX100 to the medium, the adsorption properties were modified in a manner which depended on the alkyl chain length of the alkylphenol molecule. The longer the chain length, the weaker the influence of the TX100 surface aggregates on the adsorption behaviour. In terms of the relative hydrophobicity of these molecules, this behaviour is unexpected. However, it may be due in part to the adsorbing properties of the alkylphenols that are capable of self-aggregating at the bentonite/water interface and in part to the limited swelling capacity of the TX100 micelles or surface micelles. Partition coefficients between aqueous solution and surface aggregates were determined and compared with those calculated for the bulk micelles. |
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| ISSN: | 0263-6174 2048-4038 |