The Effect of Emulsifiers on the Emulsion Stability and Extraction Efficiency of Cr(VI) Using Emulsion Liquid Membranes (ELMs) Formulated with a Green Solvent

The stability of emulsion liquid membranes (ELMs) and their ability to extract Cr(VI) were investigated. The objective of this study is to compare different ELM formulations using combinations of two hydrophilic (Tween 20 and Tween 80) and two lipophilic (polyglycerol polyricinoleate (PGPR) and Span...

Full description

Saved in:
Bibliographic Details
Published in:Membranes (Basel) 2020-04, Vol.10 (4), p.76
Main Authors: Anarakdim, Katia, Gutiérrez, Gemma, Cambiella, Ángel, Senhadji-Kebiche, Ounissa, Matos, María
Format: Article
Language:English
Subjects:
Aqueous solutions
Chromium
chromium extraction
double emulsion stability
Double emulsions
Efficiency
Emulsifiers
Emulsions
Inspection
Lipophilic
liquid membrane
Liquid membranes
Oils & fats
PGPR
Polyglycerols
Potassium
Size distribution
Solvents
Spectrum analysis
Stability
Sunflower oil
Sunflowers
Trioctylphosphine oxide
vegetable oil
Vegetable oils
Zeta potential
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The stability of emulsion liquid membranes (ELMs) and their ability to extract Cr(VI) were investigated. The objective of this study is to compare different ELM formulations using combinations of two hydrophilic (Tween 20 and Tween 80) and two lipophilic (polyglycerol polyricinoleate (PGPR) and Span 80) emulsifiers. TOPO (tri-n-octylphosphine oxide) as a carrier and a green solvent (sunflower oil) were used to provide high extraction efficiency of Cr(VI). All these double emulsions were characterized in droplet size distribution, zeta potential, visual inspection with a microscope, and stability. The best formulation was obtained with PGPR as the inner stabilizer and Tween 80 as the outer stabilizer, leading to Cr(VI) ion removal efficiency of up to 96%.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes10040076