Application of a green emulsion liquid membrane for removing copper from contaminated aqueous solution: Extraction, stability, and breakage study using response surface methodology

Zereshki, S.; Shokri, Amin; Karimi, Akram

doi:10.1016/j.molliq.2020.115251

Cited by 39 publications

(5 citation statements)

References 65 publications

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“…The volume of the sample bottle used in this study was 40 ml, and it is possible to expand the reaction volume to the "liter" level or even larger. And there are also other TLPSs, such as oil-aqueous two phase system [26,27], and liquid membranes [28][29][30], that have been extensively studied in the field of active ingredient extrac-tion and heavy metal removal. It is conceivable that these TLPSs can be carried out by coaxial liquid centrifugal platforms through the four possible transfers of substances (Figure 2D) to achieve the conversion of laboratory results to industrial production.…”

Section: Stability Test Of the Coaxial Centrifugal Owo-tlpsmentioning

confidence: 99%

Construction of coaxial liquid centrifugal platform for the extraction of active ingredients from natural products

Xiong

Chen

Duan

et al. 2023

J of Separation Science

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In the classical natural product extraction and separation process, it is tedious and requires large amounts of reagents and time. In this study, an efficient coaxial liquid centrifugal oil‐water‐oil triple‐liquid‐phase system with a simple structure and convenient operation was successfully constructed and used to extract flavonoids from Platycladi Cacumen. The results showed that the coaxial liquid centrifugal platform constructed in this study had good stability and 6 ml was the minimum volume of the middle phase for 1000 rpm to stabilize the system. Besides, it was easy to repeat the operation: the relative standard deviations of the extraction yields of flavonoids and sugar in six parallel operations were all less than 10%. Moreover, it was only one‐tenth of the time required for this method as traditional liquid‐liquid extraction while reducing the use of volatile organic reagents. Finally, the new method was more selective than the traditional method for the extraction of flavonoids. Therefore, this study provides a possibility for the coaxial liquid centrifugal platform to be used in multi‐liquid phase systems to achieve the simultaneous extraction of different parts of natural products by different liquid phases. It is expected to provide a reliable reference for further expansion of small‐scale experimental operations to industrial production.

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Section: Stability Test Of the Coaxial Centrifugal Owo-tlpsmentioning

confidence: 99%

Construction of coaxial liquid centrifugal platform for the extraction of active ingredients from natural products

Xiong

Chen

Duan

et al. 2023

J of Separation Science

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“…The stability of an emulsion is defined as liquid membrane resistance to high shear stress during solute extraction. The best stability level is essential in the ELM process [13], as it is produced using the appropriate surfactant to overcome the…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Emulsion Liquid Membrane on Chlorpyrifos Pesticide Removal: Stability, Mass Transfer Coefficient, and Extraction Efficiency Studies

Al-Damluji

Mohammed²

2023

Eng. Technol. Appl. Sci. Res.

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Emulsion Liquid Membrane (ELM) is an emerging technology that removes contaminants from water and industrial wastewater. This study investigated the stability and extraction efficiency of ELM for the removal of Chlorpyrifos Pesticide (CP) from wastewater. The stability was studied in terms of emulsion breakage. The proposed ELM included n-hexane as a diluent, span-80 as a surfactant, and hydrochloric acid (HCl) as a stripping agent. Parameters such as mixing speed, aqueous feed solution pH, internal-to-organic membrane volume ratio, and external-to-emulsion volume ratio were investigated. A minimum emulsion breakage of 0.66% coupled with a maximum chlorpyrifos extraction and stripping efficiency were achieved at 96.1% and 95.7% at best-operating conditions of 250/50 external-to-emulsion volume ratio, external feed solution pH 6, 250rpm mixing speed, and 1:1 internal-to-membrane volume ratio at 10min contact time without utilizing a carrier agent. A study of extraction kinetics and estimation of mass transfer coefficient was also conducted (3.89×10-9m/s). The results of this work can be extended to the removal of other types of pesticides from wastewater.

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“…13 However, in most cases, the ELM is insufficiently stable and requires a large amount of petroleum-based volatile organic solvents. 14 Membrane stability also depends on its composition, the shear produced by agitation, and the internal emulsion diameter. 15 Emulsion instability is another issue, resulting from the membrane breakage and thus causing leakage of the internal aqueous phase into the external phase.…”

Section: Introductionmentioning

confidence: 99%

“…The ELM possesses several advantages, such as solute extraction even in minute quantities, high interfacial area, and selective separation with high extraction efficiency . However, in most cases, the ELM is insufficiently stable and requires a large amount of petroleum-based volatile organic solvents . Membrane stability also depends on its composition, the shear produced by agitation, and the internal emulsion diameter .…”

Section: Introductionmentioning

confidence: 99%

Vegetable Oil–Ionic Liquid-Based Emulsion Liquid Membrane for the Removal of Lactic Acid from Aqueous Streams: Emulsion Size, Membrane Breakage, and Stability Study

et al. 2022

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In this study, we present a highly stable vegetable oil ionic liquid (IL)-based emulsion liquid membrane (VOILELM) for the removal of lactic acid from water streams. The system developed as a part of this work comprises a non-ionic surfactant Span 80, sodium hydroxide as an internal stripping agent, sunflower canola oil as a green diluent, and IL—tetramethylammonium acetate [TMAm][Ac]—as a carrier. VOILELM stability was evaluated in terms of breakage, emulsion diameter, and standalone stability. The effect of various parameters, namely, concentration of the surfactant, concentration of the internal stripping agent, concentration of the carrier, phase ratio, homogenizer speed, and homogenization time, on the VOILELM stability was studied. The results revealed that VOILELM was highly stable, with 1.34% minimum breakage, 1.16 μm emulsion diameter, and 131 min standalone stability. The optimal process parameters were 0.1 wt % Span 80, 0.1 M NaOH, 0.3 wt % IL, 0.25 phase ratio, 5000 rpm homogenizer speed, and 5 min homogenization time. At these optimized conditions, 96.08% lactic acid extraction efficiency was achieved. Thus, a highly effective VOILELM was developed, with minimal breakage and emulsion diameter and maximum stability.

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Application of a green emulsion liquid membrane for removing copper from contaminated aqueous solution: Extraction, stability, and breakage study using response surface methodology

Cited by 39 publications

References 65 publications

Construction of coaxial liquid centrifugal platform for the extraction of active ingredients from natural products

Construction of coaxial liquid centrifugal platform for the extraction of active ingredients from natural products

Performance Evaluation of Emulsion Liquid Membrane on Chlorpyrifos Pesticide Removal: Stability, Mass Transfer Coefficient, and Extraction Efficiency Studies

Vegetable Oil–Ionic Liquid-Based Emulsion Liquid Membrane for the Removal of Lactic Acid from Aqueous Streams: Emulsion Size, Membrane Breakage, and Stability Study

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