Results 31 to 40 of about 32,922 (302)

Toxicity of nonionic surfactants [PDF]

WIT Transactions on Ecology and the Environment, 2008
Nonionic surfactants are amphilic chemicals that enhance desorption and bioavailability by increasing solubility and dispersion of poorly soluble hydrocarbons and oils. This study was conducted to determine the toxicity of commercial nonionic surfactants by using the Microtox Acute Toxicity test which is a rapid, simple test for toxicity. The test uses
K. Jahan, S. Balzer, P. Mosto
openaire   +1 more source

An experimental study of the physical mechanisms of fluid flow in tight carbonate core samples by binary surfactants

Heliyon
Binary surfactants present a promising approach to modifying the petrophysical mechanisms of rock formations to enhance fluid flow, particularly in challenging environments like carbonate rocks.
Ayomikun Bello, Anastasia Ivanova, Alexander Rodionov, Tagir Karamov, Andrey Morkovkin, Alexey Cheremisin   +5 more
doaj   +1 more source

Optimization of Oil-in-Water Emulsion Stability: Experimental Design, Multiple Light Scattering, and Acoustic Attenuation Spectroscopy [PDF]

, 2010
To find an optimal formulation of oil-in-water (O/W) emulsions (o = 0.05), the effect of emulsifier nature and concentration, agitation speed, emulsifying time, storage temperature and their mutual interactions on the properties and behavior of these ...
Bendjaballah, Malek, Canselier, Jean-Paul, Oumeddour, Rabah   +2 more
core   +2 more sources

The influence of surfactant structure on the dyeing of polyamide knitting with acid dyes [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2018
The influence of nonionic and anionic surfactants on the dyeing kinetics of polyamide 6 knitting was studied in this work. The influence of surfactants on the dyeing process is presented by determining the kinetic and thermodynamic parameters of dyeing ...
Ristić Nebojša N., Dodić Ivica R., Ristić Ivanka P.   +2 more
doaj   +1 more source

Analytical modeling of micelle growth. 2. Molecular thermodynamics of mixed aggregates and scission energy in wormlike micelles

, 2019
Hypotheses: Quantitative molecular-thermodynamic theory of the growth of giant wormlike micelles in mixed nonionic surfactant solutions can be developed on the basis of a generalized model, which includes the classical phase separation and mass action ...
Cook, Joanne L., Danov, Krassimir D., Kralchevsky, Peter A., Stott, Ian P., Stoyanov, Simeon D.   +4 more
core   +1 more source

Effects of Spray Surfactant and Particle Charge on Respirable Coal Dust Capture

Safety and Health at Work, 2017
Background: Surfactant-containing water sprays are commonly used in coal mines to collect dust. This study investigates the dust collection performance of different surfactant types for a range of coal dust particle sizes and charges. Methods: Bituminous
Mei W. Tessum, Peter C. Raynor
doaj   +1 more source

Study on the effect of NMR-based surfactants on pore wetting of high-order coal

Meitan kexue jishu, 2023
High-order coal has the characteristics of weak water absorption due to the development of micropores. From the perspective of micropores, it is of great significance to study the improvement effect of different types of surfactants on the wettability of
Ming YANG, Tao ZHANG, Xuebo ZHANG, Jing XU, Longxiang HAN, Ji MA   +5 more
doaj   +1 more source

Mixed adsorption and surface tension prediction of nonideal ternary surfactant systems [PDF]

, 2005
To deal with the mixed adsorption of nonideal ternary surfactant systems, the regular solution approximation for nonideal binary surfactant systems is extended and a pseudo-binary system treatment is also proposed.
Ben, Corkill, Cui, Cui, Cui, Graciaa, Holland, Holland, Hua, Isikawa, Isikawa, J. P. Canselier, Lucassen-Reynders, Matsuki, Nguyen, Puvvada, Rodenas, Rosen, Rosen, Sarmoria, Scamehorn, Shiloach, Shiloach, X.-Q. Zhou, Yu, Z.-G. Cui, Zimmerman   +26 more
core   +3 more sources

Study to improve an amphoteric sulfonate alkyl ester surfactant by mixing with nonionic surfactant to reduce brine–waxy oil interfacial tension and to increase oil recovery in sandstone reservoir: T-KS field, Indonesia

Journal of Petroleum Exploration and Production Technology, 2018
Crude oil with a high wax content and high pour point can be very challenging when enhanced oil recovery by surfactant flooding is to be applied. High wax content in crude oil will lead to high intermolecular interaction because of the increasing ...
Taufan Marhaendrajana, Rani Kurnia, Dimas Irfana, Doddy Abdassah, Deana Wahyuningrum   +4 more
doaj   +1 more source

Effects of nanoparticle composite surfactants on the adsorption/desorption and diffusion of CH4 in coal

Meitan xuebao, 2023
A solid (coal) - gas (CH4) - liquid (surfactant) three-phase interaction system model is established based on the Grand Canonical Monte Carlo (GCMC) and Molecular Dynamics (MD) methods.
Yu SHI, Meng YANG, Shugang LI, Junhua XUE, Pengxiang ZHAO, Yuhua MA   +5 more
doaj   +1 more source