Growth of rod-like micelles in anionic surfactant solutions in the presence of Ca2+ counterions

Alargova, Rossitza; Иванова, В. П.; Kralchevsky, Peter A.; Mehreteab, A.; Broze, Guy

doi:10.1016/s0927-7757(98)00266-0

Cited by 61 publications

(82 citation statements)

References 29 publications

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“…Consequently, some micelles passed through the membrane increasing the permeate Cd 2+ concentration. It is supposed that beyond the second cmc (about 7.0 cmc), spherical micelles associate to build so-called "rodlike" aggregates that pass through the membrane with metal ions [34][35][36].…”

Section: Single Removal Of CD 2+mentioning

confidence: 99%

Micellar-enhanced ultrafiltration of cadmium and methylene blue in synthetic wastewater using SDS

Zeng

Xue

Huang

et al. 2011

Journal of Hazardous Materials

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Section: Single Removal Of CD 2+mentioning

confidence: 99%

Micellar-enhanced ultrafiltration of cadmium and methylene blue in synthetic wastewater using SDS

Zeng

Xue

Huang

et al. 2011

Journal of Hazardous Materials

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“…The values of D and P m for all surfactant systems studied herein rise continuously with the incremental concentrations of single surfactant systems and the addition of Brij35. Obviously, the size of micelles and the aggregation number enhance with the increasing concentration of surfactant and the Brij35/CG molar ratio α, namely, the number of surfactant molecules or in the micellar phase increase, and more binding sites between phenol and surfactant micelles enlarge [3,[32][33][34][35][36], which could be observed from higher D in Fig. 2.…”

Section: Calculated Parametersmentioning

confidence: 99%

“…2. It could be explained as followed: when the feed surfactant concentration increased, more micelles formed in the solution [32][33][34][35][36], which means the number of surfactant molecules entered the micellar phase (higher S m ), thus the free phenol in the water phase accordingly reduced. As for the mixed surfactant system, the right figure showed that S m values are approximate to each other and enhance slowly when the Brij35/CG molar ratios α varies from 0 to 1.2.…”

Section: Calculated Parametersmentioning

confidence: 99%

Study on solubilization capability of various Gemini micelles in micellar-enhanced ultrafiltration of phenol-contaminated waters

Zhang

Huang

Wei

2014

Desalination and Water Treatment

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A systematic study has been conducted to have an insight into the separation efficiency of phenol with the help of Gemini surfactants and conventional nonionic surfactant in their single and mixed systems using micellar-enhanced ultrafiltration (MEUF). A flat sheet membrane with a total effective area of 0.08 m 2 and a molecular weight cut-off of 10 kDa, was selected in this investigate. The effects of feed component (surfactant concentration for single surfactant system and mixed ratio for mixed surfactant system) on solubilization and filtration efficiency were researched. Some related parameters were used to estimate the performance of various surfactant systems, such as distribution coefficient (D), the phenol concentration in micellar phase (P m ), the surfactant concentration in micellar phase (S m ), the micelle loading (L m ), and the equilibrium distribution constant (K). With the increase of feed surfactant concentration or the addition of nonionic surfactant, the degree of solubilization of phenol enhances, leading to the decrease of permeate concentration and the augment of retentate concentration. Consequently, D, P m , and S m increases. The addition of nonionic surfactant has positive effects to recounterbalance the interior structure and improve the micellar solubilization power for phenol. Both the single and mixed C 12-2-16 systems have higher D, P m , and S m values than these of C 12-2-12 , due to the longer length alkyl chain and more optimized structure. L m and K are the significant indicators for evaluating the effectiveness of dissolving phenol. Irreversible fouling was almost eliminated with a series of cleaning solution in a short time. There results from the laboratory-scale experiments could be very useful in selection of the suitable surfactant systems for raising efficiency and could serve as valuable guide for MEUF in industrial application.

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“…In some cases, the mixture of surfactants often has better ability to modify the interfacial properties and to generate high foam volume than those of the individual interfacially active compounds and also the mixtures are advantageous because the purification of a single compound may be very expensive and difficult [5][6][7][8][9]. The mixture of two different surfactant types exhibit synergism or cooperative interaction and they can also produce unique microstructures like vesicles and rod-like micelles which are useful in certain applications [10][11][12][13][14]. However, mixed surfactant systems have the limitation that they form crystalline precipitates in aqueous solution as a result of the coulombic interaction between oppositely charged species [15].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Mixed Surfactant Systems on Foam Behavior and Surface Tension

Bera

Ojha

Mandal

2013

J Surfact & Detergents

158

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Foam and surface tension behaviors of different ionic/nonionic surfactant solutions along with their different combinations have been investigated. Among different surfactants, sodium dodecyl sulfate showed the highest foamability over other surfactants. Mixed surfactant systems were always found to have higher foamability than the individual surfactant. It was also noticeable that nonionic surfactants show good foamability when they combine with anionic and cationic surfactants. In the case of mixed surfactant systems, nonionic/cationic surfactant mixtures showed lower surface tension than nonionic/anionic surfactant mixture due to a synergistic effect.

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Growth of rod-like micelles in anionic surfactant solutions in the presence of Ca2+ counterions

Cited by 61 publications

References 29 publications

Micellar-enhanced ultrafiltration of cadmium and methylene blue in synthetic wastewater using SDS

Micellar-enhanced ultrafiltration of cadmium and methylene blue in synthetic wastewater using SDS

Study on solubilization capability of various Gemini micelles in micellar-enhanced ultrafiltration of phenol-contaminated waters

Synergistic Effect of Mixed Surfactant Systems on Foam Behavior and Surface Tension

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