Optimization of synergistic green emulsion liquid membrane stability for enhancement of silver recovery from aqueous solution

Extraction of Indigo dye from aqueous solution is studied in this research using Emulsion Liquid Membrane (ELM). Water/Oil (W/O) emulsion was prepared by mixing aqueous phase with organic phase at an elevated homogenizing speed. H2SO4 and Hexane were used as internal stripping agent and organic diluent respectively. Monooleate Sorbitan commonly known as Span-80 was used as surfactant in organic phase. This W/O emulsion was later mixed with external feed phase containing Indigo dye to make W/O/W double emulsion. Stability of the membrane was optimized by experimenting different operating parameters. The ELM prepared under the optimum conditions was finally used to remove Indigo dye from aqueous solution. The parametric study of the process parameters affecting the extraction efficiency was also performed. Under optimum conditions of parameters like volume ratio of emulsion/feed, dye concentration in feed, stirring speed and contact time of two phases, the extraction of Indigo dye was found to be 99%. Therefore, ELM was found to be an attractive and effective technique for the removal of dyes.

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EXTRACTION OF MIXED RARE EARTHS FROM AQUEOUS SOLUTION WITH EMULSION LIQUID MEMBRANE

New Frontiers in Rare Earth Science and Applications ◽

10.1016/b978-0-12-767661-6.50107-7 ◽

1985 ◽

pp. 419-422

Author(s):

Zhang Reihua ◽

Wang Dexian

Keyword(s):

Aqueous Solution ◽

Rare Earths ◽

Liquid Membrane ◽

Emulsion Liquid Membrane

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CARBON DIOXIDE REMOVAL IN EMULSION LIQUID MEMBRANE CONTAINING 2-AMINO-2-METHYL-1-PROPANOL /MONOETHANOLAMINE

Jurnal Teknologi ◽

10.11113/jt.v75.5187 ◽

2015 ◽

Vol 75 (6) ◽

Cited By ~ 2

Author(s):

S. N. Suahadah ◽

K. S. N. Kamarudin ◽

S. B. M. Najib ◽

N. Dolmat

Keyword(s):

Carbon Dioxide ◽

Aqueous Solution ◽

Liquid Membrane ◽

Interfacial Area ◽

Co2 Absorption ◽

Organic Solution ◽

Emulsion Liquid Membrane ◽

Rotating Disc ◽

Corrosion Problem ◽

Span 80

Absorption using aqueous alkanolamine is commonly used in industry to remove the carbon dioxide. However it has several weaknesses such as corrosion problem and low absorption rate. Emulsion liquid membrane is introduced as an alternatives method for CO2 absorption because it can reduce the corrosion problem and the formation water droplets creates large interfacial area for absorption to occur. 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA) present in the aqueous phase in the form of aqueous droplets, surrounded by the organic solution to form water in oil (w/o) emulsion. In this study, effects of amines ratios and amine quantities, and emulsification time and speed on the ELM stability and CO2 absorption were investigated. The ELM was prepared by homogenizing the aqueous and the organic phases. AMP and MEA were added into sodium hydroxide (NaOH) solution to form aqueous solution, and kerosene and Span-80 were mixed to form the organic solution. The absorption study was carried out in rotating disc contactor (RDC) column. A mixture of 12 v% MEA, 4 v% AMP in 100 ml aqueous solution and 8 v% Span-80 in 100 ml organic phase has high stability and can remove 60% of CO2. The stability of the emulsion remained high even after the absorption. This study proved that ELM has the potential to remove CO2 by using only small amount of amines.

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