نتایج جستجو برای: surfactant enhanced emulsification microextraction

تعداد نتایج: 370005  

Journal: :Journal of hazardous materials 2010
Y S Ng N S Jayakumar M A Hashim

The percentage removal of phenol from aqueous solution by emulsion liquid membrane and emulsion leakage was investigated experimentally for various parameters such as membrane:internal phase ratio, membrane:external phase ratio, emulsification speed, emulsification time, carrier concentration, surfactant concentration and internal agent concentration. These parameters strongly influence the per...

2014
Y. S. Ng N. S. Jayakumar M. A. Hashim

The percentage removal of phenol from aqueous solution by emulsion liquid membrane and emulsion leakage was investigated experimentally for various parameters such as membrane: internal phase ratio, membrane: external phase ratio, emulsification speed, emulsification time, carrier concentration, surfactant concentration and internal agent concentration. These parameters strongly influence the p...

2014
Caili Dai Kai Wang Yifei Liu Jichao Fang Mingwei Zhao

An investigation was conducted to study the reutilization of clear fracturing flowback fluids composed of viscoelastic surfactants (VES) with additives in surfactant flooding, making the process more efficient and cost-effective. The clear fracturing flowback fluids were used as surfactant flooding system with the addition of α-olefin sulfonate (AOS) for enhanced oil recovery (EOR). The interfa...

Journal: :Ecotoxicology and Environmental Safety 2021

The present study investigated the stability and efficacy of a biosurfactant produced by Klebsiella sp. KOD36 under extreme conditions its potential for enhancing solubilization degradation phenanthrene in various environmental matrices. mono-rhamnolipids with low critical micelle concentration (CMC) value. was stable (60 °C, pH 10 10% salinity) could lower surface tension 30% maintained an emu...

Journal: :Chemical Engineering Science 2022

Environmental concerns on contamination of subsurface porous media by toxic chemicals have motivated the petroleum industry to replace them with environmentally sustainable (green) and biodegradable alternatives. Green surfactants emerged such as sugar, enzymatic, microbial based surfactants. However, their emulsification different oils salinity conditions is unknown. In this study, oil brine s...

The present work was aimed to develop and characterize rosuvastatin loaded self emulsifying drug delivery system for the effective management of hypolipidemia (RSEDDS) for improving bioavailability, to enhance solubility, to prolong residence time and to provide sufficient amount of drug to a target site in a sustained release manner. Self-emulsifying drug delivery system was prepared by simple...

2013
Xiaoji Cao Lingxiao Shen Xuemin Ye Feifei Zhang Jiaoyu Chen Weimin Mo

An effective and environmentally friendly method based on ionic liquid-based ultrasound-assisted emulsification microextraction (IL-USAEME) and high performance liquid chromatography (HPLC) has been developed for the determination of nine hormones including three glucocorticoids, one androgen and five progestogens in cosmetics. Several factors that affect the extraction efficiency, such as the ...

Journal: :Applied and environmental microbiology 2001
J D Van Hamme O P Ward

Methods to enhance crude oil biodegradation by mixed bacterial cultures, for example, (bio)surfactant addition, are complicated by the diversity of microbial populations within a given culture. The physical and metabolic interactions between Rhodococcus sp. strain F9-D79 and Pseudomonas sp. strain JA5-B45 were examined during growth on Bow River crude oil. The effects of a nonionic chemical sur...

Journal: :International journal of pharmaceutics 2010
Yi Zhao Changguang Wang Albert H L Chow Ke Ren Tao Gong Zhirong Zhang Ying Zheng

The aim of the present study was to develop a self-nanoemulsifying drug delivery system (SNEDDS) for the oral delivery of Zedoary turmeric oil (ZTO), an essential oil extracted from the dry rhizome of Curcuma zedoaria. Pseudo-ternary phase diagrams were constructed to identify the efficient self-emulsification regions. ZTO could serve as a partial oil phase with the aid of the second oil phase ...

Journal: :Soft Matter 2021

Giant polymer vesicles are obtained from double emulsion droplets stabilized by low molecular weight block copolymers. The method is based on a simple two-step emulsification, with no additional surfactant required other than the copolymer.

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