Surfactant-enhanced remediation technology has shown promising potential for removing residual organics from contaminated soils and groundwater. Using a homologous series of cationic surfactants, alkylpyridinium bromide, it was found that the molar solubilization ratio (MSR) for naphthalene decreases with decreasing carbon number in the hydrophobic tail. In contrast, with nonylphenyl ethoxylate...

Surfactant flooding can mobilize trapped oil and change the wettability of rock to be more hydrophilic, which increases recovery factor. However, selection surfactants is difficult in case high salinity conditions. In this work, we synthesized three novel anionic-nonionic based on widely used nonionic surfactant nonylphenol polyethoxylated (NPEO) evaluated their efficiencies for enhanced (EOR) ...

Abstract The diffusion kinetics of a molecular probe—rhodamine B—in ternary aqueous solutions containing poly(vinyl alcohol), glycerol, and surfactants was investigated using fluorescence correlation spectroscopy dynamic light scattering. We show that the characteristics rhodamine B in such complex systems is determined by synergistic effect crowding intermolecular interactions between chemical...

In this work, a novel protocol was developed for size tuning and cetyltrimethylammonium bromide (CTAB) removal of gold nanorods using commercially available nonionic fluorosurfactants (FSN), an excellent candidate for PEG and other modification reagents. The tunable gold nanorods can easily be obtained by stopping the ligand replacement reaction at different time intervals. The FSN-coated gold ...

The apoprotein of human serum beta lipoprotein has been prepared in a lipid-free and soluble form by a technique of interfacial extraction in the presence of guanidinium hydrochloride and nonionic amphiphile. Gel permeation chromatography of maleylated apobeta lipoprotein separates two protein fractions with different amino acid compositions. The smaller particle has a molecular weight of 2.6 x...

Soil washing process with a surfactant solution is a potential technology for the rapid removal of hydrophobic organic compound (HOC) from soil. However, large amount of washed water would be produced during operation and this should be treated effectively by proper methods. The soil washed water for complex contaminated site with HOC and heavy metals might contain high amount of pollutants suc...

The aim of this work was to study intermolecular interactions in systems containing charged polyion (polyacrylate, PA(-)), charged surfactant (C(16)TA(+)) and nonionic surfactant (C(12)E(5) or C(12)E(8)). To achieve this we have created four different phase diagrams using two different so-called complex salts, C(16)TAPA(25) and C(16)TAPA(6000), both consisting of positively charged surfactant (...

of a dissertation by Ewelina Kalwarczyk A modern, twenty-first-century chemistry, not only continues the research conducted in previous centuries, but also brings together various branches of science and technology. The goal of this approach is usually to create new materials characterized by an interesting combination of physicochemical properties. In my studies, I followed this trend and appl...

Nonionic low osmolality contrast media (LOCMs) are used universally in computed tomography (CT) imaging. Although adverse reactions due to nonionic LOCMs are a common cause of emergency room (ER) admissions, few studies have investigated these adverse reactions. In the present study, we evaluated the characteristics of patients who were transferred from the CT room to the ER due to adverse reac...

We study adsorption of two nonionic surfactants (C12E5 and C12E8) on a dispersed suspension of negatively charged laponite particles. First, we quantify adsorption, i.e. the amount of adsorbed molecules per gram of dried solid. Then, we show that contrast variation experiments under controlled conditions along the adsorption isotherm of the surfactant on dispersed laponite particles allow to de...