scholarly journals Recovery of Ionized Nanosilver from Wash Water Solution using Emulsion Liquid Membrane Process

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
Raja Norimie Raja Sulaiman ◽  
Norasikin Othman ◽  
Nor Aishah Saidina Amin
Keyword(s):  
Liquid Membrane ◽  
Water Solution ◽  
Absorption Spectrometry ◽  
Wash Water ◽  
Extraction Time ◽  
Ionic Form ◽  
Emulsion Liquid Membrane ◽  
Sorbitan Monooleate ◽  
Cyanex 302 ◽  
Internal Phase

The increasing numbers of product containing nanosilver have raised a great concern about their possible impact in the environment especially in the ionic form which leads to the toxicity problem when the association occurs with the organism cells. Therefore, the main focus of this study was to investigate several parameters influencing the recovery of ionized nanosilver from wash water using emulsion liquid membrane (ELM) process. This process involves three phases dispersion system including external, membrane and internal phase. The membrane phase was prepared by dissolving bis [2, 4, 4-trimethylpentyl] monothiophosphinic acid (Cyanex 302) as a carrier and Sorbitan Monooleate (Span 80) as a surfactant in kerosene as a diluent. Thiourea in Sulfuric acid (H2SO4) was used as a stripping agent in the internal phase. The important parameters such as extraction time, carrier and stripping agent concentrations were investigated. All experiments were conducted in batch system. The concentration of the ionized nanosilver was measured using Atomic Absorption Spectrometry (AAS). The result demonstrated that almost 100% of silver ion was extracted with 91% have been recovered within 5 minute of extraction time using 0.005 M Cyanex 302 and 1.0 M Thiourea in 1.5 M H2SO4. Hence, ELM was proven to be a very promising technique for the simultaneous extraction and recovery of ionized nanosilver from wash water.

Parameter Study of Ionized Nanosilver Recovery from Wash Water using Emulsion Liquid Membrane Process

2014 ◽  
Vol 67 (4) ◽  
Author(s):  
Raja Norimie Raja Sulaiman ◽  
Norasikin Othman ◽  
Nor Aishah Saidina Amin ◽  
Norul Fatiha Mohamed Noah
Keyword(s):  
Liquid Membrane ◽  
Absorption Spectrometry ◽  
Aquatic Organism ◽  
Agitation Speed ◽  
Wash Water ◽  
Organic Chemical ◽  
Parameter Study ◽  
Emulsion Liquid Membrane ◽  
Internal Phase ◽  
External Phase

Ionized nanosilver is a harmful and highly toxic owing to its association with other organic chemical especially with the aquatic organism cells. Therefore, it is crucial to treat the ionized nanosilver to preserve the environment. In this study, experiments were carried out using emulsion liquid membrane (ELM) process in order to investigate the performance of extraction and recovery of ionized nanosilver from wash water. This process involves three phase dispersion systems including external phase, membrane phase and internal phase. The ELM formulation consists of bis [2,4,4-trimethylpentyl] monothiophosphinic acid (Cyanex 302) as a carrier, Span 80 as a surfactant, kerosene as a diluent and thiourea in sulphuric acid (H2SO4) solution as stripping agent. This study has highlighted several effects of parameters including agitation speed, pH of external phase, and treat ratio. The concentration of the ionized nanosilver was measured using Atomic Absorption Spectrometry (AAS). The results have demonstrated that at optimum conditions, the percentages of extraction, stripping and recovery were 96, 84 and 80% respectively at 150 rpm of agitation speed, pH 2 and 0.33 of treat ratio.

Carrier Assisted Emulsion Liquid Membrane Process for Recovery of Basic Dye from Wastewater using Continuous Extractor

2014 ◽  
Vol 67 (2) ◽  
Author(s):  
Norasikin Othman ◽  
Ooi Zing-Yi ◽  
Norlisa Harruddin ◽  
Raja Norimie ◽  
Norela Jusoh ◽  
...  
Keyword(s):  
Textile Industry ◽  
Liquid Membrane ◽  
Volume Ratio ◽  
Extraction Process ◽  
Membrane Phase ◽  
Emulsion Liquid Membrane ◽  
Sorbitan Monooleate ◽  
Internal Phase ◽  
Span 80 ◽  
Dye Extraction

Nowadays, water pollution has become major issue especially dye contaminated wastewaters from the textile industry. Dye causes serious environmental pollution and health problems. The removal of color from dye-contaminated wastewaters in the related industries becomes a major concern all over the world. In this research, several parameters of dye extraction and recovery in the continuous emulsion liquid membrane (ELM) process were investigated. This process consisted of three phases which are external (feed) phase, membrane phase and internal phase. The membrane phase was prepared by dissolving extractant bis(2-ethylhexyl)phosphoric acid (D2EHPA) and hydrophobic surfactant sorbitan monooleate (Span 80) in kerosene as diluents. The internal phase consisted of an aqueous solution of sulfuric acid (H2SO4). The important parameters governing the extraction process of dye such as stirring speed, initial dye concentration, Span 80 concentration and treat ratio (volume ratio of emulsion to external phase) were studied. The results showed that the optimum condition for 25ppm initial concentration of dye extraction are 250 rpm stirring speed, 5% (w/v) Span 80 and treat ratio 1:5. At this condition, the percentage of dye extraction, stripping and recovery were 98%, 82% and 81% respectively. Hence, continuous ELM technique is proven to be a very promising technique in industrial wastewater treatment and recovery of dye.

scholarly journals Removal of Ibuprofen at Low Concentration Using a Newly Formulated Emulsion Liquid Membrane

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 740
Author(s):  
Abdul Latif Ahmad ◽  
Mohd Hazarel Zairy Mohd Harun ◽  
Mohd Khairul Akmal Jasni ◽  
Nur Dina Zaulkiflee
Keyword(s):  
Liquid Membrane ◽  
Volume Ratio ◽  
Pharmaceutical Product ◽  
Ionic Surfactant ◽  
Emulsion Liquid Membrane ◽  
Sorbitan Monooleate ◽  
Low Concentration ◽  
Optimum Parameters ◽  
Internal Phase ◽  
Stirring Time

Ibuprofen (IBP) is a pharmaceutical product that is widely prescribed as an over-the-counter painkiller. It has been classified as a contaminant of emerging concern (CEC) that has received global attention in the search for a better wastewater separation technology. The emulsion liquid membrane (ELM) is one of the potential solutions for IBP removal from wastewater owing to its advantages, such as the ability to remove a highly soluble solute, energy efficient and tuneable formulation. To develop this ELM, a series of parameters such as stirring speed, emulsification time, organic to internal phase volume ratio (O/I), internal phase concentration, carrier concentration and surfactant concentration were studied. The extraction was carried out for 15 min stirring time and the concentration of IBP in the feed phase was determined using a UV-Vis spectrophotometer. The optimum formulation for the ELM was found at 300 rpm stirring speed, 20 min emulsification time, 3:1 of O/I, 0.1 M ammonia, NH3 (stripping agent), 6 wt% trioctylamine, TOA (carrier) and 2 wt% sorbitan monooleate, Span 80 (non-ionic surfactant). IBP removal of 89% was achieved at the optimum parameters of ELM. The current research demonstrated that a newly formulated ELM has great potential in removing a low concentration IBP from wastewater.

Removal of Hexavalent Chromium-Contaminated Wastewater by Micro-Emulsion Liquid Membrane Method

2011 ◽  
Vol 356-360 ◽  
pp. 1962-1966
Author(s):  
Chun Shan Zhu ◽  
Li Qiu ◽  
Jia Song ◽  
Yan Li Yuan
Keyword(s):  
Hexavalent Chromium ◽  
Liquid Membrane ◽  
Removal Rate ◽  
Emulsion Liquid Membrane ◽  
Sorbitan Monooleate ◽  
Internal Phase ◽  
External Phase ◽  
Stirring Time ◽  
Naoh Solution ◽  
Micro Emulsion

The micro-emulsion liquid membrane (MELM) was prepared for the extraction of hexavalent chromium (Cr (Ⅵ)) from wastewater. The membrane phase consists of kerosene as a membrane solvent, tributyl phosphate (TBP) as a mobile carrier, and sorbitan monooleate(Span80) as a surfactant. A NaOH solution is the internal aqueous phase. The effects of different conditions on the extractive of Cr (Ⅵ) were discussed. The results showed that the removal rate of Cr (Ⅵ) could reach 99.78% when the NaOH concentration was of 0.1mol•L-1in internal phase, the pH values 1.0-1.75 in external phase, Rew of 1:3 and Roi of 2:1, stirring time of 12min and stirring rate of 320r•min-1, 10% of carrier and 15%-17% of surfactant.

CADMIUM REMOVAL USING VEGETABLE OIL BASED EMULSION LIQUID MEMBRANE (ELM): MEMBRANE BREAKAGE INVESTIGATION

2015 ◽  
Vol 75 (1) ◽  
Author(s):  
A. L. Ahmad ◽  
M. M. H. Shah Buddin ◽  
B. S. Ooi ◽  
Adhi Kusumastuti
Keyword(s):  
Vegetable Oil ◽  
Liquid Membrane ◽  
Corn Oil ◽  
Volume Ratio ◽  
Aliquat 336 ◽  
Emulsion Liquid Membrane ◽  
Cadmium Removal ◽  
Internal Phase ◽  
External Phase ◽  
Span 80

The aim of this research is to quantify the occurrence of membrane breakage in vegetable oil based Emulsion Liquid Membrane (ELM). Basically, ELM consists of three main phases; internal, external and membrane. In this work, the membrane phase was prepared by dissolving Span 80 as surfactant and Aliquat 336 as carrier in commercial grade corn oil. As a way to promote sustainable development, vegetable oil which is environmentally benign diluent was incorporated in the formulation of ELM. The influence of several important parameters towards membrane breakage were studied. They are carrier and surfactant concentration, W/O volume ratio, emulsification time, internal phase concentration as well as stirring speed. Based on the data obtained, emulsion prepared using 4 wt% Aliquat 336 and 3 wt% Span 80 resulted in the most stable emulsion with only 0.05% membrane breakage. The emulsion was produced using W/O volume ratio of 1/3 and it was homogenized with the assistance of ultrasound for 15 min. Moreover, emulsion produced able to provide a fair balance between emulsion stability and Cd(II) permeability as it able to remove 98.20% Cd(II) ions from the external phase. 

Extraction of Ionized Nanosilver by Emulsion Liquid Membrane Using Cyanex 302 as a Mobile Carrier

2014 ◽  
pp. 463-469
Author(s):  
Raja Norimie Raja Sulaiman ◽  
Norasikin Othman ◽  
Nor Aishah Saidina Amin ◽  
Noor Haziqah Kamaludin ◽  
Nur Na Illah Sallih Udin
Keyword(s):  
Liquid Membrane ◽  
Emulsion Liquid Membrane ◽  
Cyanex 302 ◽  
Mobile Carrier

A two-step approach for copper and nickel extracting and recovering by emulsion liquid membrane

2016 ◽  
Vol 74 (10) ◽  
pp. 2454-2461
Author(s):  
Qiang Bi ◽  
Juanqin Xue ◽  
Yingjuan Guo ◽  
Guoping Li ◽  
Haibin Cui
Keyword(s):  
Liquid Membrane ◽  
Volume Fraction ◽  
Process Variable ◽  
Phase Volume ◽  
Optimum Conditions ◽  
Application Technology ◽  
Emulsion Liquid Membrane ◽  
Phase Volume Fraction ◽  
Internal Phase ◽  
Valuable Metals

The recycling of copper and nickel from metallurgical wastewater using emulsion liquid membrane (ELM) was studied. P507 (2-ethylhexyl phosphonic acid-2-ethylhexyl ester) and TBP (tributyl phosphate) were used as carriers for the extraction of copper and nickel by ELMs, respectively. The influence of four emulsion composition variables, namely, the internal phase volume fraction (ϕ), surfactant concentration (Wsurf), internal phase stripping acid concentration (Cio) and the carrier concentration (Cc), and the process variable treat ratio on the extraction efficiencies of copper or nickel were studied. Under the optimum conditions, 98% copper and nickel were recycled by using ELM. The results indicated that ELM extraction is a promising industrial application technology to retrieve valuable metals in low concentration metallurgical wastewater.

scholarly journals Optimization of Emulsion Liquid Membrane for Lead Separation from Aqueous Solutions

2017 ◽  
Vol 7 (5) ◽  
pp. 2068-2072 ◽  
Author(s):  
E. Fouad ◽  
F. Ahmad ◽  
K. Abdelrahman
Keyword(s):  
Liquid Membrane ◽  
Volume Ratio ◽  
Lead Extraction ◽  
Emulsion Liquid Membrane ◽  
Pareto Chart ◽  
Optimum Parameters ◽  
Phase Concentration ◽  
Internal Phase ◽  
Optimal Values ◽  
Agitation Time

This study focuses on evaluating the process parameters and their effects on extraction of lead as well as emulsion breaking. The Signal / Noise ratios have been used to study the performance characteristics. Six parameters affecting extraction by emulsion liquid membrane, namely, TOPO, Span80, and internal phase concentration, feed/emulsion ratio, agitation time and feed pH have been optimized with considerations to lead extraction and emulsion breaking. The standardized effects of the independent variables and their interactions were tested by the analysis of variance (ANOVA) with 95% confidence limits (α= 0.05) and Pareto chart. The use of the optimal values of these parameters has been proved useful in maximizing the extraction efficiency and minimizing the emulsion breakage. TOPO concentration of 0.1498 M, Span 80 concentration of 3.007 v%, Internal phase concentration of 0.183 M, Feed/emulsion volume ratio of 1.407, agitation time of 30 minutes, and feed pH of 5 are determined as the optimum parameters.

scholarly journals Study on Mg2+ removal from ammonium dihydrogen phosphate solution by an emulsion liquid membrane

2014 ◽  
Vol 68 (3) ◽  
pp. 341-346 ◽  
Author(s):  
JianHong Luo ◽  
Jun Li ◽  
Bao Wang
Keyword(s):  
Extraction Efficiency ◽  
Liquid Membrane ◽  
Volume Fraction ◽  
Operating Conditions ◽  
Dihydrogen Phosphate ◽  
Phosphate Solution ◽  
Ammonium Dihydrogen Phosphate ◽  
Emulsion Liquid Membrane ◽  
Internal Phase ◽  
Initial Ph

Mg2+is extracted from ammonium dihydrogen phosphate (NH4H2PO4) solution by an emulsion liquid membrane (ELM) using mono-(2-ethylhexyl) 2-ethylhexyl phosphonate (HEHPEHE)as a carrier, sulfonated liquid polybutadiene (LYF) as a surfactant and kerosene as a solvent. To study the extraction efficiency and advantages of the ELM process in the separation of Mg2+,the effects of various operating conditions on the extraction -HEHPEHE volume fraction, reaction temperature, treat ratio (emulsion phase / external phase), phase ratio (membrane phase / internal phase), agitation speed, extraction time, internal phase concentration, surfactant LYF concentration and initial pH of NH4H2PO4 solution are experimentally investigated and discussed. The results show that Mg2+ in NH4H2PO4 solution can be effectively removed by the ELM process. An extraction efficiency of more than 83.1% is attained at the optimized parameters and superior-grade NH4H2PO4can be obtained by two levels of extraction.

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