Phase diagram of a system of cationic surfactant and anionic polyelectrolyte: tetradecyltrimethylammonium bromide-hyaluronan-water

1990 ◽  
Vol 94 (10) ◽  
pp. 4289-4295 ◽  
Author(s):  
Kyrre. Thalberg ◽  
Bjoern. Lindman ◽  
Gunnar. Karlstroem
Keyword(s):  
Phase Diagram ◽  
Cationic Surfactant ◽  
Tetradecyltrimethylammonium Bromide ◽  
Anionic Polyelectrolyte

Viscoelastic Solutions of Wormlike Micelles of a Cationic Surfactant and a Stiff-Chain Anionic Polyelectrolyte

2019 ◽  
Vol 61 (6) ◽  
pp. 765-772 ◽  
Author(s):  
A. V. Shibaev ◽  
D. Yu. Mityuk ◽  
D. A. Muravlev ◽  
O. E. Philippova
Keyword(s):  
Cationic Surfactant ◽  
Wormlike Micelles ◽  
Anionic Polyelectrolyte ◽  
Stiff Chain

scholarly journals Purification of real car wash wastewater with complex coagulation/flocculation methods using polyaluminum chloride, polyelectrolyte, clay mineral and cationic surfactant

2019 ◽  
Vol 80 (10) ◽  
pp. 1902-1909 ◽  
Author(s):  
G. Veréb ◽  
V. E. Gayır ◽  
E. N. Santos ◽  
Á. Fazekas ◽  
Sz. Kertész ◽  
...  
Keyword(s):  
Clay Mineral ◽  
Cationic Surfactant ◽  
Color Removal ◽  
Ammonium Bromide ◽  
High Concentration ◽  
Polyaluminum Chloride ◽  
Anionic Polyelectrolyte ◽  
Sediment Volume ◽  
Car Wash ◽  
Car Wash Wastewater

Abstract In the present study, real car wash wastewater was purified by different coagulation/flocculation methods. As coagulant, polyaluminum chloride (‘BOPAC’), conventional iron(III) chloride, iron(III) sulfate, and aluminum(III) chloride were used, while as flocculant non-ionic and anionic polyelectrolytes were investigated. The effects of added clay mineral (Na-bentonite) and cationic surfactant (hexadecyltrimethyl ammonium bromide – ‘HTABr’) were also investigated. The use of BOPAC was significantly more effective than conventional coagulants. Extra addition of clay mineral was also beneficial in relation to both the sediment volume and sedimentation speed, while polyelectrolyte addition enhanced further the sedimentation. Moreover, the simultaneous addition of HTABr significantly enhanced the color removal efficiency due to the successful in-situ generation of organophilic bentonite. In summary, the application of 100 mg L−1 Na-bentonite with 20 mg L−1 Al3+ (from BOPAC) and 0.5 mg L−1 anionic polyelectrolyte resulted in the efficient reduction of the turbidity (4–6 NTU), the COD (158 mg L−1) and the extractable oil content (4 mg L−1) with efficiencies of 98%, 59%, and 85%, respectively. By applying organophilic bentonite in high concentration (500 mg L−1) with identical concentrations of BOPAC and anionic polyelectrolyte, significant color removal (5 times lower absorbance at λ = 400 nm) and 27% lower sediment volume were achieved.

Study of Adsorbed Monolayers of a Cationic Surfactant and an Anionic Polyelectrolyte at the Air−Water Interface

Langmuir ◽  
2003 ◽  
Vol 19 (14) ◽  
pp. 5680-5690 ◽  
Author(s):  
Nirmesh J. Jain ◽  
Pierre-Antoine Albouy ◽  
Dominique Langevin
Keyword(s):  
Cationic Surfactant ◽  
Water Interface ◽  
Anionic Polyelectrolyte ◽  
Air Water Interface

scholarly journals Coordinated response of phospholipids and acyl components of membrane lipids in Pseudomonas putida A (ATCC 12633) under stress caused by cationic surfactants

Microbiology ◽  
2014 ◽  
Vol 160 (12) ◽  
pp. 2618-2626 ◽  
Author(s):  
Romina Marisa Heredia ◽  
Paola Sabrina Boeris ◽  
María Alicia Biasutti ◽  
Gastón Alberto López ◽  
Natalia Soledad Paulucci ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Pseudomonas Putida ◽  
Acid Composition ◽  
Cationic Surfactant ◽  
Unsaturated Fatty Acids ◽  
Membrane Lipids ◽  
Saturated Fatty Acids ◽  
Tetradecyltrimethylammonium Bromide

The present study assessed the role of membrane components of Pseudomonas putida A (ATCC 12633) under chemical stress conditions originated by treatment with tetradecyltrimethylammonium bromide (TTAB), a cationic surfactant. We examined changes in fatty acid composition and in the fluidity of the membranes of cells exposed to TTAB at a specific point of growth as well as of cells growing with TTAB. The addition of 10–50 mg TTAB l−1 promoted an increase in the saturated/unsaturated fatty acid ratio. By using fluorescence polarization techniques, we found that TTAB exerted a fluidizing effect on P. putida A (ATCC 12633) membranes. However, a complete reversal of induced membrane fluidification was detected after 15 min of incubation with TTAB. Consistently, the proportion of unsaturated fatty acids was lower in TTAB-treated cells as compared with non-treated cells. In the presence of TTAB, the content of phosphatidylglycerol increased (120 %), whilst that of cardiolipin decreased (60 %). Analysis of the fatty acid composition of P. putida A (ATCC 12633) showed that phosphatidylglycerol carried the major proportion of saturated fatty acids (89 %), whilst cardiolipin carried an elevated proportion of unsaturated fatty acids (18 %). The increase in phosphatidylglycerol and consequently in saturated fatty acids, together with a decrease in cardiolipin content, enabled greater membrane resistance, reversing the fluidizing effect of TTAB. Therefore, results obtained in the present study point to changes in the fatty acid profile as an adaptive response of P. putida A (ATCC 12633) cells to stress caused by a cationic surfactant.

Phase behavior of a system of cationic surfactant and anionic polyelectrolyte: the effect of salt

1991 ◽  
Vol 95 (15) ◽  
pp. 6004-6011 ◽  
Author(s):  
Kyrre Thalberg ◽  
Bjoern Lindman ◽  
Gunnar Karlstroem
Keyword(s):  
Phase Behavior ◽  
Cationic Surfactant ◽  
Anionic Polyelectrolyte
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