Effect of the pore size on the adsorption of dimeric cationic surfactants from aqueous solution onto aluminosilicate adsorbents with a hexagonal pore arrangement

2007 ◽  
pp. 72-76 ◽  
Author(s):  
M. J. Meziani ◽  
H. Benalla ◽  
J. Zajac ◽  
S. Partyka
Keyword(s):  
Aqueous Solution ◽  
Pore Size ◽  
Cationic Surfactants ◽  
Pore Arrangement

The microstructure of functionalized poLyacrylonitrile beads for bioseparations

1990 ◽  
Vol 48 (4) ◽  
pp. 1094-1095
Author(s):  
Eduardo A. Kamenetzky ◽  
David A. Ley
Keyword(s):  
Aqueous Solution ◽  
Affinity Chromatography ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Surface Coverage ◽  
Vacuum Impregnation ◽  
Thin Sections ◽  
Selective Staining ◽  
Low Viscosity ◽  
Diamond Knife

The microstructure of polyacrylonitrile (PAN) beads for affinity chromatography bioseparations was studied by TEM of stained ultramicrotomed thin-sections. Microstructural aspects such as overall pore size distribution, the distribution of pores within the beads, and surface coverage of functionalized beads affect performance properties. Stereological methods are used to quantify the internal structure of these chromatographic supports. Details of the process for making the PAN beads are given elsewhere. TEM specimens were obtained by vacuum impregnation with a low-viscosity epoxy and sectioning with a diamond knife. The beads can be observed unstained. However, different surface functionalities can be made evident by selective staining. Amide surface coverage was studied by staining in vapor of a 0.5.% RuO4 aqueous solution for 1 h. RuO4 does not stain PAN but stains, amongst many others, polymers containing an amide moiety.

Effects of Surface Properties and Solvent PH Values on the Adsorption/Desorption Abilities of Mesoporous SBA-15 to Methylene Blue Molecules

2012 ◽  
Vol 518-523 ◽  
pp. 352-355
Author(s):  
Hui Liu ◽  
Hong Liang Li ◽  
Meng Xue Wang ◽  
Jing Jing Sang ◽  
Xiu Song Zhao
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Surface Properties ◽  
Weak Base ◽  
Adsorption Ability ◽  
Ph Values ◽  
Model Molecule ◽  
Adsorption Desorption

Methylene blue (MB) was used as model molecule to investigate the effects of surface properties and solvent pH values on the adsorption and desorption (or release) behaviors of mesoporous SBA-15 materials. It was found that the treatment of SBA-15 with a pH 7.8 aqueous solution can enhance the adsorption rate and capacity in comparison with the pristine SBA-15. The effect of pH values on MB releasing from the weak base treated SBA-15 and the pristine one have been studied and been compared in pH values range from 0.5 to 7.0. Both of them showed a maximum releasing rate at about pH 2 and all of the treated SBA-15 samples showed a higher releasing quantity than the pristine ones. The influence mechanisms of base treatment on the adsorption ability and that of pH values on the releasing properties of SBA-15 samples have been analyzed and been discussed based on the composition, the morphology, the surface area and pore size distribution and adsorption/desorption measurements.

Thermodynamic properties of new gluconamide-based cationic surfactants in aqueous solution: Experimental and modeling approaches

2013 ◽  
Vol 66 ◽  
pp. 1-8 ◽  
Author(s):  
Bożenna Różycka-Roszak ◽  
Edyta Woźniak ◽  
Paweł Misiak ◽  
Renata Frąckowiak ◽  
Kazimiera A. Wilk
Keyword(s):  
Aqueous Solution ◽  
Thermodynamic Properties ◽  
Cationic Surfactants ◽  
Modeling Approaches

Structural Investigation of NaNO3 Nanophase Confined in Porous Silica

1994 ◽  
Vol 332 ◽  
Author(s):  
R. Mu ◽  
D. O. Henderson ◽  
F. Jin
Keyword(s):  
Aqueous Solution ◽  
Pore Size ◽  
Sodium Nitrate ◽  
Structural Investigation ◽  
Solid Phase ◽  
Porous Silica ◽  
Phase Region ◽  
Molecular Aggregates

ABSTRACTWe have demonstrated that thermal and vibrational investigations of sodium nitrate (NaNO3) physically confined in the porous silica hosts is an effective approach to mimic the solute clustering effects in aqueous solution. The results show that the structure of the NaNO3 confined in nanopores can be divided into three regions, i.e., the regular solid phase region, solution-like molecular aggregates region, and a new solid-like phase region. Depending upon the pore size of the porous host, the physical range of the three regions varies accordingly. For pore size d <2.5 nm, only the solution-like molecular aggregates phase remains.

Preparation of MgCl2-Coated Activated Carbon and its Adsorption Behavior of Azo Dye from Aqueous Solution

2009 ◽  
Vol 79-82 ◽  
pp. 295-298
Author(s):  
Jin Xiang Sun ◽  
Hai Zeng Wang ◽  
Bao Wei Sun
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Specific Surface ◽  
Pore Size ◽  
Azo Dye ◽  
Removal Rate ◽  
Weak Acid ◽  
Adsorption Behavior ◽  
Optimum Conditions ◽  
Mgcl2 Solution

The preparation of MgCl2/AC composite and its adsorption behavior of azo dye from aqueous solution were investigated. The pore size of the new kinds of adsorbent increased with increasing the dosage of MgCl2 solution, while specific surface area decreased. The removal rate of Weak Acid Red 2R from aqueous solution on the MgCl2/AC composite was 93.4 % at the optimum conditions of the preparation: activated carbon with 2 M MgCl2 solution at 110°C for 2 h.

Aggregation behaviours and bactericidal activities of novel cationic surfactants functionalized with amides and ether groups

RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 27197-27204 ◽  
Author(s):  
Guangzhou Cao ◽  
Xiangfeng Guo ◽  
Lihua Jia ◽  
Xuhua Tian
Keyword(s):  
Aqueous Solution ◽  
Surface Activity ◽  
Cationic Surfactants ◽  
High Surface ◽  
Bacterial Activity ◽  
Aggregation Behaviors ◽  
Bactericidal Activities ◽  
High Surface Activity

Novel cationic surfactants exhibit high surface activity, interesting aggregation behaviors in aqueous solution and excellent bacterial activity.

Adsorption Characteristics of Spiropyran-Modified Cationic Surfactants at the Silica/Aqueous Solution Interface

Langmuir ◽  
2010 ◽  
Vol 26 (12) ◽  
pp. 9283-9288 ◽  
Author(s):  
Kenichi Sakai ◽  
Yuki Imaizumi ◽  
Takakuni Oguchi ◽  
Hideki Sakai ◽  
Masahiko Abe
Keyword(s):  
Aqueous Solution ◽  
Cationic Surfactants ◽  
Adsorption Characteristics ◽  
Solution Interface
Sign in / Sign up

Export Citation Format

Share Document