Surface Activity Interactions in Aqueous Solution of Anionic Surfactants with a Water Treatment Protein from Moringa oleifera Seeds
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Date
2015-02-11
Journal Title
Journal ISSN
Volume Title
Publisher
Scientific Research Publishing
Abstract
The interaction of anionic surfactants sodium dodecylbenzenesulphonate (SDBS) and sodium bis
(2-ethyl-1-hexylsulfosuccinate) (AOT) with the water treatment protein extracted from Moringa
oleifera seeds has been investigated by surface tension measurements. The results were compared
with previously reported studies using surface tension and zeta potential measurements of the
same protein with an anionic surfactant sodium dodecylsulphate. There is a strong electrostatic
interaction between the protein and the surfactants characterized by a local maximum at intermediate
surfactant concentration. This surfactant concentration depends on the protein concentration
and corresponds to the surfactant concentration at the point of charge reversal (zeta potential
= 0 mV). The number of surfactant molecules required to neutralize the positive charges on
the protein was found to be 8 per protein molecule.
Description
Keywords
Anionic, Critical Micelle ConcentrationPotential, Surface Tension, Surfactant, Moringa oleifera, Zeta Potential