scholarly journals Synergistic Interaction in the adsorbed mixed surfactants film of Sodium Dodecyl Sulfate and Cocamidopropyl Betaine on Liquid – Air Interfacial

2016 ◽  
Vol 13 (2) ◽  
pp. 1-9
Author(s):  
Baghdad Science Journal
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Conductivity Measurements ◽  
Temperature Range ◽  
Solution Interface ◽  
Surfactant Film ◽  
Dodecyl Sulfate ◽  
Mixed Film ◽  
Cocamidopropyl Betaine ◽  
The Individual

In the present work, the critical micelle concentration (CMC) of the solution of Sodium dodecyl sulfate (SDS) as anionic surfactant, Cocamidopropyl Betaine (CAPB) as amphoteric surfactant, and their mixture have been determined using surface tension and conductivity measurements at a temperature range 293 -323 K. The adsorption and thermodynamic micellization parameters (?G?m, ?G?ads, ?max ,Amin,?cmc ) for individual surfactants was calculated. Rosen model which is focuses on the adsorbed mixed surfactant film at the air/solution interface was used to calculate the interaction parameter ( ?? ) at the interface and the activity coefficients g1 and g2. The results indicate that the CMC of the individual surfactants was affected by the temperature at the temperature range studied. Also, the results indicate a synergistic effect present at the air – solution mixed film of surfactants.

Adsorption of Polyelectrolyte/Surfactant Mixtures at the Air−Solution Interface:  Poly(ethyleneimine)/Sodium Dodecyl Sulfate†

Langmuir ◽  
2005 ◽  
Vol 21 (22) ◽  
pp. 10061-10073 ◽  
Author(s):  
J. Penfold ◽  
I. Tucker ◽  
R. K. Thomas ◽  
J. Zhang
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Surfactant Mixtures ◽  
Solution Interface ◽  
Dodecyl Sulfate

Pyrene Fluorescence at Air/Sodium Dodecyl Sulfate Solution Interface

Langmuir ◽  
2006 ◽  
Vol 22 (26) ◽  
pp. 11205-11207 ◽  
Author(s):  
Robin Humphry-Baker ◽  
Michael Grätzel ◽  
Yoshikiyo Moroi
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Sulfate Solution ◽  
Sodium Dodecyl Sulfate Solution ◽  
Pyrene Fluorescence ◽  
Solution Interface ◽  
Dodecyl Sulfate

scholarly journals Structural-rheological properties of systems based on polymeric hydrogels and anionic surfactants

2020 ◽  
Vol 64 (5) ◽  
pp. 551-557
Author(s):  
S. V. Bucha ◽  
Yu. V. Lipai ◽  
P. D. Vorobiev ◽  
D. V. Cherednichenko ◽  
A. D. Vorobiov ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Rheological Properties ◽  
Sodium Oleate ◽  
Polyacrylic Acid ◽  
Anionic Surfactants ◽  
Sodium Dodecyl ◽  
Dodecyl Sulfate ◽  
Polymeric Hydrogels ◽  
The Individual ◽  
Increasing Temperature

The effect of sodium dodecyl sulfate and sodium oleate on the structural-rheological properties of a dispersed hydrogel based on polyacrylic acid was studied. It was shown that the viscosity of hydrogel compositions with surfactants is higher than the viscosity of the individual components and increases with increasing temperature from 20 to 40 °C. Compositions with sodium oleate are non-Newton liquids and exhibit thixotropic properties.

scholarly journals Assessing the toxicities of the binary mixtures of sodium dodecyl sulfate and heavy metals to Serratia marcescens (SerEW01) from Otamiri River

2021 ◽  
Vol 16 (1) ◽  
pp. 45-56
Author(s):  
Okechi R.N. ◽  
Chukwura E.I. ◽  
Nweke C.O.
Keyword(s):  
Heavy Metals ◽  
Sodium Dodecyl Sulfate ◽  
Serratia Marcescens ◽  
Dehydrogenase Activity ◽  
Binary Mixtures ◽  
Concentration Ratio ◽  
Sodium Dodecyl ◽  
Mixture Ratio ◽  
Dodecyl Sulfate ◽  
The Individual

Toxicities of sodium dodecyl sulfate (SDS) + Pb(II), SDS + Cd(II), SDS + Ni(II), SDS + Zn(II), and SDS + Co(II) binary mixtures to Serratia marcescens (SerEW01) isolated from Otamiri river water, Owerri, Imo State, Nigeria were undertaken, using dehydrogenase activity as a response. Inhibitions of dehydrogenase activity by the individual toxicants were concentrationdependent, increasing steadily as the concentration increases. The observed EC50S ranged from 0.046 ± 0.003 mM for Zn(II) to 2.329 ± 0.092 mM for SDS. Duncan tests indicated that the EC50S of the individual toxicants differed significantly from each other. The order of decreasing toxicities was Zn(II) > Cd(II) > Co(II) > Ni(II) > Pb(II) > SDS. Fixed ratio mixtures [Arbitrary concentration ratio (ABCR) and EC50 equieffect concentration ratio (EECR 50)] were used to study the joint action of the binary mixtures. The mixtures progressively inhibited dehydrogenase activity in S. marcescens as the concentration increases. However, SDS 98.08% + Co(II) 1.92% mixture ratio was biphasic. The effects of the mixtures on the dehydrogenase activity were assessed using Toxic Index, Model Deviation Ratio and Isobolographic analyses. In addition, the toxicities of the mixtures were predicted with concentration addition (CA) and independent action (IA) models. In SDS+Ni(II) binary mixture, both models predicted similar toxicities. In all binary mixtures, both models greatly underestimated the mixture toxicities compared to the experimentally-observed data. Similarly, both the experimentally-observed, CA and IA-predicted EC50S were statistically different from each another. Furthermore, the binary mixtures were generally synergistic against S. marcescens (SerEW01). This demonstrates the potential danger of co-contamination of the aquatic system by SDS and heavy metals

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