The adsorption characteristics of sodium dodecyl sulfate (SDS) on stainless steel surface in aqueous solutions as well as the effect of added NaClO 4 on adsorption are investigated. The stainless steel surface is hydrophobic when wetted by water and negatively charged in SDS solutions, which was characterized by performing open circuit …
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Sodium dodecyl sulfate of the chemical formula C 12 H 25 NaO 4 S and the molecular mass 288.4 g/mol was purchased from Fluka and used as received. Then, the SDS aqueous solutions of the surfactant concentrations above and below CMC (x mol/L HCl – 100 mg M(II)/L – SDS) were prepared by flooding a proper amount of SDS with the …
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Effects of Bulk Colloidal Stability on Adsorption Layers of Poly(diallyldimethylammonium Chloride)/Sodium Dodecyl Sulfate at the Air–Water Interface Studied by Neutron Reflectometry. The Journal of Physical Chemistry B 2011, 115 (51), …
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We examined coadsorption from mixtures of the anionic surfactant sodium dodecyl sulfate (SDS) with either hydroxypropyl cellulose (HPC) or …
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Abstract. We studied the reversibility of coadsorption from mixtures of the anionic surfactant sodium dodecyl sulfate with either hydroxypropyl cellulose (HPC) …
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The adsorption of sodium dodecyl sulfate (SDS) and n-dodecanol from aqueous solutions of the pure and mixed surfactants at the air–water surface is studied …
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using the anionic surfactant sodium dodecyl sulfate (SDS), we aim to determine if the adsorption of surfactants on FGSs displays a two-step behavior as on graphitic carbons and also if the csac occurs at a similar concentration. Many techniques have been used to study surfactant adsorption at solid−liquid interfaces, such as two-phase dye
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This study examines the adsorption of the anionic surfactant sodium dodecyl sulfate under micellar and high submicellar conditions on a C18 column, applying two methods. One of them uses a refractive index detector to obtain direct measurements of the adsorbed amount of sodium dodecyl sulfate, whereas the second method is based on the retention ...
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In this study, a method of removing an anionic surfactant sodium dodecyl sulfate (SDS) from an aqueous solution by cellulose modified with quaternary ammonium cation was discussed. Cellulose, as the adsorbent, was obtained from medical cotton balls, and the quaternary ammonium cation (synthesized from dodecyl dimethyl tertiary amine …
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Adsorption of sodium dodecyl sulfate (NaDS) and calcium dodecyl sulfate (Ca(DS)2) at the aqueous surface was measured by a radiotracer method using tritium labelled compounds at constant ionic ...
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We report on the adsorption of sodium dodecyl sulfate (SDS) onto functionalized graphene sheets (FGSs) in an aqueous system, measured at broad SDS and FGS concentration ranges by conductometric ...
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In this study, a method of removing an anionic surfactant sodium dodecyl sulfate (SDS) from an aqueous solution by cellulose modified with quaternary ammonium cation was discussed. Cellulose, as the adsorbent, was obtained from medical cotton balls, and the quaternary ammonium cation (synthesized from dodecyl dimethyl tertiary amine …
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The developed method is based on the reaction of trace amounts of cobalt and nickel from aqueous solutions with 2-nitroso-1-naphthol (Fig. S1) and adsorption of formed complexes on sodium dodecyl sulphate-coated Fe 3 O 4 NPs. The 300 mL of sample (pH 5.0) was transferred to 500 mL glassware beakers.
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Adsorptive separation of sodium dodecyl sulfate (SDS) was investigated in the present work using modified adsorbent prepared by thermo-chemical activation of coconut shell based on Phosphoric acid as an activation agent (PAACS-I). The effect of different operating conditions on extent of SDS removal has been studied.
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Sodium dodecyl sulfate (SDS), as one of the most common anionic surfactants, has been extensively used in industrial processes (Zhang et al. 2012).However, the adverse side effects have been discovered and determined as a threat to the environment (Shcherbakova et al. 1999).Therefore, efficient removal of SDS before …
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Sodium dodecyl sulfate decreases the amine group density in the chitosan and affects the electric charge, which neutralizes the cations of the chitosan molecule [14]. Chitosan modified with sodium dodecyl sulfate has an increased anion. It is the result of the hydrophobic interaction between the dye
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The adsorption and structure of sodium dodecyl sulfate (SDS) layers onto positively charged films have been monitored in situ with vibrational sum …
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The adsorption of sodium dodecyl sulfate (SDS) and n-dodecanol from aqueous solutions of the pure and mixed surfactants at the air–water surface is …
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Finally, CuZnFeAl–S was prepared by modifying CuZnFeAlO with sodium dodecyl sulfate (SDS). The physical and chemical properties of the adsorbents were characterized by XRD, N 2 adsorption–desorption, SEM, ICP, FT-IR, TG-DSC, and IGC; subsequently their adsorption performance was investigated. The results show that the …
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Sodium dodecyl sulfate (SDS) surfactant is used and simulations at different SDS concentrations were conducted. The results show that adsorption of the gas is influenced by the amount of SDS on the zeolite surface. In addition, gas retention inside and outside the solid is observed and it strongly depends on the free sodium ions in the zeolite.
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We examined coadsorption from mixtures of the anionic surfactant sodium dodecyl sulfate (SDS) with either hydroxypropyl cellulose (HPC) or hydrophobically …
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In this study, bone char (BC) was used as an adsorbent for sodium dodecyl sulfate (SDS) in aqueous solution. Batch studies were performed to address various experimental parameters like contact time (0–360 min), adsorbent dosage (3, 5 and 7 g/L), initial SDS concentration (0.5, 1 and 2 mg/L) for the removal of the SDS. A greater …
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The surface wettability of LDH, SDS-LDH and AM/SDS-LDH was further investigated by static contact angle measurements using water drops. As shown in Fig. 3 a, the water contact angle of LDH was determined to be 52.8°. Obviously, the introduction of SDS and AM have largely enhanced the hydrophobicity of LDH, and the water contact …
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The surface selectivity determines the reversibility of coadsorption with respect to changes in the solution sodium dodecyl sulfate (SDS) concentration. On the selective silica surface, an adsorbed layer becomes kinetically trapped in path-dependent states because SDS is electrostatically repelled from the negatively charged surface and …
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Two oppositely charged surfactants in an aqueous solution interact with each other via electrostatic interactions and produce surfactant complexes—catanionics. However, their quantitative influence on the interfacial tension at the solution/air and solution/oil interfaces is still unknown. We have measured the interfacial tension of …
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Sum-frequency spectroscopy has been used to study coadsorption of dodecanol and sodium dodecyl sulfate (SDS) at the interface between aqueous solutions and a monolayer of octadecanethiol on gold. Selective deuteration was …
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We report on the adsorption of sodium dodecyl sulfate (SDS) onto functionalized graphene sheets (FGSs) in an aqueous system, measured at broad SDS and FGS concentration ranges by conductometric surfactant titration. At dilute SDS concentrations (<12 μM in bulk solution), there is evidence of a counterion exchange between hydronium ions (from the …
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Adsorption is the most significant first step for boundary lubrication film formation, catalysis and chemical synthesis processes. Nevertheless, at present, the adsorption process and …
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Acrylic acid and acrylamide are among the main materials used in the synthesis and preparation of hydrogels. Free radical polymerisation is commonly used to prepared acrylic acid hydrogel since acrylic acid can easily react with the electrophilic agent and free radicals [19].Acrylic acid (Fig. 1) is a monomer that is cross-linked to produce …
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In this study, the lubrication behaviors of sodium dodecyl sulfate (SDS) and sodium bis (2-ethylhexyl) sulfosuccinate (Aerosol-OT, AOT) solutions were comparatively investigated under step-changed ...
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Surfactant solutions are widely used in industry, and their steady-state lubrication properties have been comprehensively explored, while the "dynamic process" between steady states attracts much less attention. In this study, the lubrication behaviors of sodium dodecyl sulfate (SDS) and sodium bis (2–ethylhexyl) sulfosuccinate …
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2.1. Surfactant. An anionic surfactant, sodium dodecyl sulfate [SDS, CH 3 (CH 2) 11 OSO 3 Na, molecular weight 288.38 g mol −1] with purity of 99.0% was purchased from Nacalai Tesque, Inc., Kyoto, Japan.The critical micelle concentrations (CMC) of SDS at three sodium chloride concentrations at 25°C obtained from the measurement with the …
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Sum-frequency spectroscopy has been used to study coadsorption of dodecanol and sodium dodecyl sulfate (SDS) at the interface between aqueous solutions and a monolayer of octadecanethiol on gold. Selective deuteration was employed to distinguish between the two adsorbed surfactants. Mixed monolayers were studied over …
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This study examines the adsorption of the anionic surfactant sodium dodecyl sulfate under micellar and high submicellar conditions on a C18 column, applying two methods using a refractive index detector and a retention and peak shape for a set of cationic basic compounds that indirectly reveal the presence of adsorbed monomers of …
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Sodium dodecyl benzene sulphonate (SDBS) is a commonly used anionic surfactant 5, discovering the adsorption characteristics of SDBS on the surface of kaolinite minerals can provide a basis for ...
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