Emulsion liquid membrane extraction of lactic acid from aqueous solutions and fermentation broth

1993 ◽  
Vol 42 (1) ◽  
pp. 50-58 ◽  
Author(s):  
C. Schöller ◽  
J. B. Chaudhuri ◽  
D. L. Pyle
Keyword(s):  
Lactic Acid ◽  
Aqueous Solutions ◽  
Liquid Membrane ◽  
Fermentation Broth ◽  
Membrane Extraction ◽  
Emulsion Liquid Membrane ◽  
Liquid Membrane Extraction

scholarly journals Emulsion Liquid Membrane Extraction of Turquoise Blue Reactive Dye–Study on Membrane Breakage and Swelling

2017 ◽  
Vol 11 (1) ◽  
Author(s):  
N. Othman ◽  
S. N. Zailani ◽  
N. Mili
Keyword(s):  
Liquid Membrane ◽  
Raw Materials ◽  
Extraction Process ◽  
Reactive Dye ◽  
Point Of View ◽  
Membrane Extraction ◽  
Hydrodynamic Condition ◽  
Emulsion Liquid Membrane ◽  
Liquid Membrane Extraction ◽  
Span 80

Reactive dyes are the principal dyes used in batik industry in Malaysia. From the environmental point of view the dyes should be removed from wastewater because they are toxic in nature. Therefore, the removal and recovery of dyes from batik industry wastewater is absolute necessity in order to save raw materials and to protect environment from hazardous compounds. An experiment was carried out using emulsion liquid membrane (ELM) process in batch system to study the extraction behaviour of Turquoise Blue which is commonly used in batik industry. Several parameters have been studied such as carrier and surfactant/emulsifier concentrations, stripping agent and extraction time. The liquid membrane was formulated using kerosene as diluent, SPAN 80 as emulsifier and tri-dodecylamine (TDA) as a carrier. Hydrodynamic condition to generate extraction process was at 1:3 treat ratio and 250 rpm stirring speed for 10 minutes while the emulsification was done at 12000 rpm for 5 minutes using homogenizer. The result obtained shows that, more than 70% of Turquoise Blue was extracted at favourable condition of 0.07 M TDA, 7% (w/v) SPAN 80 and 0.5 M Thiourea in 1 M NaOH.

scholarly journals Emulsion Liquid Membrane Extraction of Silver from Photographic Waste using Tetramethylthiuram Disulfide (TMTDS) as a Mobile Carrier

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Norasikin Othman ◽  
Chan Kit Hie ◽  
Chiong Tung ◽  
Hanapi Mat ◽  
Masahiro Goto
Keyword(s):  
Heavy Metals ◽  
Liquid Membrane ◽  
Raw Materials ◽  
Precious Metals ◽  
Membrane Extraction ◽  
Industrial Wastes ◽  
Emulsion Liquid Membrane ◽  
Tetramethylthiuram Disulfide ◽  
Mobile Carrier ◽  
Liquid Membrane Extraction

The recovery of precious metals such as silver from photographic wastes is required in order to save raw materials and to protect the environment from dispersed compound, especially heavy metals. For that matter, several technologies have been used such as precipitation, electrolytic, and ion exchange processes which offer some advantages as well as drawbacks over others. Recently, emulsion liquid membrane extraction has been recognized to be a potential process for industrial wastes treatment and recovery of heavy metals. This process has the ability to selectively separate and rapidly concentrate metals through its very thin layer liquid membrane which has a large interfacial area. An attempt was made to recover silver from liquid photographic wastes using tetramethylthiuram disulfide as a mobile carrier. The important variables affecting the emulsion liquid membrane (ELM) process including residence time, surfactant concentration, carrier concentration, level of agitation and phase ratio between emulsion and feed phase were investigated. The results showed that tetramethylthiuram disulfide is selective towards silver (>80%) compared to other metals in the photographic waste. The highest silver extraction is obtained using 0.05 M tetramethylthiuram disulfide, 3% (w/v) Span 80, 300 rpm stirring speed, 1.0 M thiourea in 0.1 M HCl stripping agent, 1:3 of treat ratio, and toluene as the diluent.

scholarly journals EMULSION LIQUID MEMBRANE EXTRACTION OF Zr AND Hf FROM ACID NITRIC USING EXTRACTANT TOPO

2017 ◽  
Vol 18 (1) ◽  
pp. 25
Author(s):  
Kris Tri Basuki ◽  
Sudibyo Sudibyo
Keyword(s):  
Liquid Membrane ◽  
Membrane Extraction ◽  
Emulsion Liquid Membrane ◽  
X Ray ◽  
Liquid Membrane Extraction ◽  
Span 80

EKSTRAKSI EMULSI MEMBRANE CAIR Zr dan HF DALAM LARUTAN ASAM NITRAT DENGAN EKSTRAKTAN TOPO. Telah dilakukan ekstraksi larutan Zr yang mengandung Hf menggunakan  extraktan TOPO. Sebagai fasa air digunakan larutan campuran ZrO(NO3)2 dan HfO(NO3)2 yang mengandung Zr 10 gr/L dan Hf 500 mg/L, sedangkan ekstraktan atau fasa organik adalah TOPO dengan variasi konsentrasi yang diencerkan dengan kerosen. Emulgator Span-80 digunakan untuk membuat membuat larutan membrane emulsi.Fasa internal yang digunakan adalah asam nitrat 3M dan fasa eksternal yang digunakan adalah asam fosfat 5M. Parameter yang diteliti yaitu konsentrasi ekstraktan, kecepatan pengadukan, waktu pengadukan, dan perbandingan fasa internal dan fasa eksternal. Untuk analisis Zr dan Hf digunakan metode X-Ray Fluorescence (XRF). Dari hasil optimasi proses ekstraksi Zr dan Hf dengan membran emulsi  dengan menggunakan ekstraktan TOPO diperoleh kesimpulan sebagai berikut: waktu pembuatan fasa membran adalah dengan kecepatan pengadukan 8000 rpm, konsentrasi TOPO 5% dalam kerosen, konsentrasi internal asam nitrat 3M, konsentrasi asam fosfat 5M, waktu ekstraksi pengadukan 10 menit dengan kecepatan pengadukan tetap 500 rpm , dan perbandingan fasa membran dan fasa eksternal 1 : 1. Pada kondisi ini diperoleh faktor pisah (FP) Zr-Hf = 17,39.

Sign in / Sign up

Export Citation Format

Share Document