Effect of Addition of KX Type Electrolytes and Temperature on the Critical Micellar Concentrations of 1-Cetylpyridinium and Carbethopendecinium Bromides

1994 ◽  
Vol 59 (1) ◽  
pp. 99-105 ◽  
Author(s):  
Mária Vojteková ◽  
František Kopecký ◽  
Olga Greksáková ◽  
Jarmila Oremusová
Keyword(s):  
Aqueous Solutions ◽  
Temperature Dependence ◽  
Cationic Surfactants ◽  
Ion Selective Electrodes ◽  
Specific Interactions ◽  
Cetylpyridinium Bromide ◽  
Semiempirical Equation

The critical micellar concentrations (cmc) of the title cationic surfactants were measured in aqueous solutions at 25 °C in the presence of KBr, KF, KCl, KI, KSCN, KNO3, KAc and HCOOK. The conductometric and, in part, potentiometric methods employing ion selective electrodes were used. For 1-cetylpyridinium bromide in the absence of any of the electrolytes, the decreasing temperature dependence of cmc was measured conductometrically over the region of 12 - 40 °C and the association degree of the micelles with Br- anions was calculated. The decrease in cmc of the two surfactants due to the presence of electrolytes (in concentrations up to tenfold cmc) was expressed by means of a semiempirical equation. There are indications that I- and SCN- anions enter into specific interactions with micelles.

Contrasting effect of 1-butanol and 1, 4-butanediol on the triggered micellar self-assemblies of C16-type cationic surfactants

2021 ◽  
Author(s):  
Vinod Kumar ◽  
Rajni Verma ◽  
Dwarkesh Satodia ◽  
Debes Ray ◽  
Ketan Kuperkar ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Cationic Surfactant ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Alkyl Chain ◽  
Cetylpyridinium Bromide ◽  
Quaternary Salts ◽  
Head Groups ◽  
Contrasting Effect ◽  
Cetyltrimethylammonium Tosylate

Self-assembly in aqueous solutions of three quaternary salts based C16-type cationic surfactant with different polar head groups and identical carbon alkyl chain viz., cetylpyridinium bromide (CPB), cetyltrimethylammonium tosylate (CTAT), and...

Temperature dependence of thermal diffusion for aqueous solutions of monosaccharides, oligosaccharides, and polysaccharides

2012 ◽  
Vol 14 (29) ◽  
pp. 10147 ◽  
Author(s):  
Yuki Kishikawa ◽  
Haruka Shinohara ◽  
Kousaku Maeda ◽  
Yoshiyuki Nakamura ◽  
Simone Wiegand ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Temperature Dependence ◽  
Thermal Diffusion

Temperature dependence of the acid–base and Ca2+-complexation equilibria of d-gluconate in hyperalkaline aqueous solutions

Polyhedron ◽  
2019 ◽  
Vol 158 ◽  
pp. 117-124 ◽  
Author(s):  
Ákos Buckó ◽  
Bence Kutus ◽  
Gábor Peintler ◽  
István Pálinkó ◽  
Pál Sipos
Keyword(s):  
Aqueous Solutions ◽  
Temperature Dependence ◽  
Acid Base ◽  
Complexation Equilibria

Temperature Dependence ofgValues for Aqueous Solutions Irradiated with 23 MeV2H+and 157 MeV7Li3+Ion Beams

1996 ◽  
Vol 100 (21) ◽  
pp. 9014-9020 ◽  
Author(s):  
A. John Elliot ◽  
Monique P. Chenier ◽  
Denis C. Ouellette ◽  
Vernon T. Koslowsky
Keyword(s):  
Aqueous Solutions ◽  
Temperature Dependence ◽  
Ion Beams

Adsorption Morphologies of Polyethylene Glycol and Cationic Surfactants in HCl-containing H2SO4 Aqueous Solutions

2020 ◽  
Vol 49 (8) ◽  
pp. 952-955
Author(s):  
Takahiro Fukui ◽  
Kenji Kubota ◽  
Yoshie Tarutani ◽  
Masaaki Akamatsu ◽  
Kenichi Sakai ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Aqueous Solutions ◽  
Cationic Surfactants

scholarly journals Equilibrium, Kinetic, and Thermodynamic Studies of Anionic Dyes Adsorption on Corn Stalks Modified by Cetylpyridinium Bromide

2018 ◽  
Vol 3 (1) ◽  
pp. 4 ◽  
Author(s):  
Liudmyla Soldatkina ◽  
Marianna Zavrichko
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Cationic Surfactant ◽  
Kinetic Studies ◽  
Batch Adsorption ◽  
Cetylpyridinium Bromide ◽  
Anionic Dyes ◽  
Pseudo Second Order ◽  
Dyes Adsorption

Corn stalks (CS) were modified by a cationic surfactant, cetylpyridinium bromide (CPB), and used as an adsorbent (CS-CP) to remove anionic dyes [Acid Red (AR) and Acid Orange (AO)] from aqueous solutions. The FTIR analysis and the obtained calculations based on the determination of the adsorption capacity of CS towards CPB confirmed that the cationic surfactant had been adsorbed on the surface of corn stalks. Adsorption of the anionic dyes on modified corn stalks was investigated in a series of batch adsorption experiments at 303–328 K. The adsorption data were analyzed using Langmuir, Freundlich, and Temkin models. The Langmuir model was found to be more suitable for the experimental data of the anionic dyes on CS-CP than other adsorption models. Kinetic studies revealed that the pseudo-second order model showed the best fit to the experimental data. The thermodynamic parameters indicated that the adsorption process was spontaneous and exothermic. Mechanisms involving ion exchange and chemisorption might be responsible for the uptake of the anionic dyes on CS-CP. Obtained results imply that CS-CP could be applied as an effective adsorbent to remove anionic dyes from aqueous solutions.

Cu(II) Ion-Selective Electrodes Based on Cu(II) Complex with Cyclized Salophen

2003 ◽  
Vol 58 (7) ◽  
pp. 658-662 ◽  
Author(s):  
Manal R. Al-Saraj ◽  
Salman M. Saadeh ◽  
Monzir S. Abdel-Latif
Keyword(s):  
Aqueous Solutions ◽  
Ion Selective Electrodes ◽  
Similar Response ◽  
Membrane Composition ◽  
Experimental Conditions ◽  
Selectivity Coefficients ◽  
Potentiometric Selectivity ◽  
Coated Disc ◽  
Coated Wire

Several versions of Cu(II) ion selective electrodes (ISE), based on cyclized N,N'-bis(salicylidene)-o-phenylenediamine (salophen) complexes with Cu(II), were fabricated for determination of Cu(II) in aqueous solutions. The response of the ISE was optimized by variation of membrane composition and evaluation of various experimental conditions. Near Nernstian slopes (~ 28-32 mV/decade) were obtained for some preparations. The linear range of the ISE ranged from 5 × 10-5 to 1 × 10-2M Cu(II). Coated-wire and coated disc ISE resulted practically in a similar response as screen printed electrodes (SPE). The potentiometric selectivity coefficients (Kij) for all electrodes were determined for Na+, NH4+, Ca2+, Mg2+, Ni2+, Pb2+, Zn2+, Cd2+, Co2+, Fe3+, Hg2+, CO32-, H2PO4-, HPO42-, SO42-, CH3COO-, Br-, I-, NO3-, and SCN-. The selectivity coefficients were in the range from 10-2 to 10-3 for all ions tested except Hg2+, I-, and to less extent Fe3+. Fabricated ISE using the Cu(II)-salophen complex are reliable and stable.

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