The interaction of a zwitterionic
surfactant with the water treatment protein extracted from Moringa oleifera has been investigated by surface tension and
ultrasonic velocity measurements. The critical micelle concentration (CMC) of
zwitterionic surfactant was determined to be 2.4 ± 0.3 mM by both techniques and the partial specific volume ν = 0.78 ± 0.06 cm3/g for the protein was found. There seems to be a mild
interaction between the protein and the surfactant as shown by surface tension
measurements. The ultrasonic velocity was found to decrease in the vicinity of the critical micelle concentration which may be due to micelle aggregates formation and
the protein caused a shift of the surfactant’s CMC to a higher concentration.
Cite this paper
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