scholarly journals Facilitated Chromium(VI) Transport across an Ionic Liquid Membrane Impregnated with Cyphos IL102

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2437 ◽  
Author(s):  
Francisco Jose Alguacil
Keyword(s):  
Ionic Liquid ◽  
Liquid Membrane ◽  
Present System ◽  
Liquid Membranes ◽  
Green Solvents ◽  
Chromium Vi ◽  
Aqueous Streams ◽  
Hazardous Element ◽  
General Concern ◽  
Key Parameter

Chromium(VI) is a well-known hazardous element, thus, its removal from aqueous sources is of a general concern. Among the technologies used for the removal of this type of toxic elements, liquid membranes are gaining in importance and the same has occurred with the use of ionic liquids, considered for many, due to their properties, as green solvents. Thus, the present work joined the three previous points, presenting an experimental study about the removal of chromium(VI) by the use of a liquid membrane operation which used the commercially available Cyphos IL102 ionic liquid as a carrier. The experimental variables included: the stirring speed applied to the feed and receiving solution (a key-parameter to gain maximum transport), acid, chromium(VI), sodium hydroxide and Cyphos IL102 concentrations in their various phases. Additionally, the performance of the present system was evaluated both against the presence of other metals in solution and other carriers. The experimental results confirmed that Cyphos IL102 is a good carrier for chromium(VI) transport and, thus, its removal from aqueous streams, and it also performed well in the presence of accompanying metals and against the performance of other commercially available carriers.

Ionic Liquids as Green Solvents for the Treatment of Endocrine Disrupting Compounds Using Liquid Membranes

2016 ◽  
Vol 5 (6) ◽  
pp. 258-270
Author(s):  
Santhi Raju Pilli ◽  
Tamal Banerjee ◽  
Kaustubha Mohanty
Keyword(s):  
Endocrine Disruptors ◽  
Liquid Membrane ◽  
Endocrine Disrupting Compounds ◽  
Membrane Technology ◽  
Liquid Membranes ◽  
Green Solvents ◽  
Endocrine Disrupting ◽  
Water And Wastewater ◽  
Living Organisms ◽  
Supported Ionic Liquid Membranes

Presence of endocrine disruptors in water and wastewater pose a serious threat to all living organisms. The removal of such disruptors is a major challenge especially most of the time they are present in trace amounts. Several technologies were tested to see if 100% removal can be achieved. Most of the existing technologies failed to achieve the target and have their own limitations. Membrane technology and especially liquid membrane technology has of late generated extreme interest among the researchers working with pollutants in trace amounts. In this work, experiments on three endocrine disruptors such as BPA, PCP and ES are carried out using supported ionic liquid membranes to see their removal efficiencies. The effects of various process parameters were studied to optimize them.

Constructing CO2-facilitated transport highway in supported ionic liquid membranes

2014 ◽  
Vol 07 (02) ◽  
pp. 1450012 ◽  
Author(s):  
Xiang Jun Sun ◽  
Ju Jie Luo ◽  
Meng Zhang ◽  
Jin Ping Li
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Upper Bound ◽  
Liquid Membrane ◽  
Facilitated Transport ◽  
Reversible Reaction ◽  
Liquid Membranes ◽  
Supported Ionic Liquid ◽  
Selective Membrane ◽  
Supported Ionic Liquid Membranes

A Carbon dioxide-facilitated transport highway ( CO 2-FTH) on the microporous surface of a membrane matrix was designed using the amino carrier 3-aminopropyltriethoxysilane (APTES). Owing to the reversible reaction between CO 2 molecules and fixed-site carriers, this supported ionic liquid membrane was able to selectively transfer CO 2 more quickly. This concept may inspire means of fabricating a highly permeable and selective membrane to break through Robeson's upper bound.

Supported liquid membrane system for Cr(III) separation from Cr(III)/Cr(VI) mixtures

2014 ◽  
Vol 69 (12) ◽  
pp. 2476-2481 ◽  
Author(s):  
P. Religa ◽  
J. Rajewski ◽  
P. Gierycz ◽  
R. Świetlik
Keyword(s):  
Liquid Membrane ◽  
Membrane System ◽  
Liquid Membranes ◽  
Phase Mixing ◽  
Chromium Vi ◽  
Supported Liquid Membranes ◽  
Carrier Interaction ◽  
Oxidation Properties ◽  
Feed Phase ◽  
Phase Surface

This paper presents the results of analyses of the chromium(III) transport process from mixtures of Cr(III)/Cr(VI) ions using supported liquid membranes (SLM), in which dinonylnaphthalene sulfonic acid (DNNSA) and di(2-ethylhexyl) phosphoric acid (D2EHPA) were used as carriers. In both cases the membrane worked as a selective barrier for Cr(VI) ions. The increase in both the time of Cr(VI) ions–carrier interaction and the Cr(VI) concentration in the feed phase negatively influenced the Cr(III) separation. The polarizing layer consisting of Cr(VI) ions prevents the access of Cr(III) ions to the inter phase surface and leads to the deactivation of the carrier, which is the result of the strong oxidation properties of Cr(VI) ions. These factors meant that, in the case of the membrane with DNNSA, the membrane could not be used for the effective separation of Cr(III) from the Cr(III)/Cr(VI) mixture. On the other hand, the membrane with D2EHPA can be used for fast and efficient transport of Cr(III) ions, but only for strictly defined process parameters, i.e. where the level of chromium(VI) concentration is below 10−3M and with intensive feed phase mixing.

Catalytic Ionic-Liquid Membranes: The Convergence of Ionic-Liquid Catalysis and Ionic-Liquid Membrane Separation Technologies

ChemPlusChem ◽  
2017 ◽  
Vol 83 (1) ◽  
pp. 7-18 ◽  
Author(s):  
Pavel Izák ◽  
Felix D. Bobbink ◽  
Martin Hulla ◽  
Martina Klepic ◽  
Karel Friess ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Membrane ◽  
Membrane Separation ◽  
Liquid Membranes

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Ionic Liquid Membrane for Carbon Capture and Separation

2021 ◽  
pp. 1-20
Author(s):  
M. Zunita ◽  
R. Hastuti ◽  
A. Alamsyah ◽  
K. Khoiruddin ◽  
I. G. Wenten
Keyword(s):  
Ionic Liquid ◽  
Carbon Capture ◽  
Liquid Membrane

scholarly journals Investigating the Proton and Ion Transfer Properties of Supported Ionic Liquid Membranes Prepared for Bioelectrochemical Applications Using Hydrophobic Imidazolium-Type Ionic Liquids

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 359
Author(s):  
László Koók ◽  
Piroska Lajtai-Szabó ◽  
Péter Bakonyi ◽  
Katalin Bélafi-Bakó ◽  
Nándor Nemestóthy
Keyword(s):  
Mass Transfer ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microbial Fuel Cells ◽  
Transport Numbers ◽  
Liquid Membranes ◽  
Ion Transfer ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes ◽  
Transfer Properties

Hydrophobic ionic liquids (IL) may offer a special electrolyte in the form of supported ionic liquid membranes (SILM) for microbial fuel cells (MFC) due to their advantageous mass transfer characteristics. In this work, the proton and ion transfer properties of SILMs made with IL containing imidazolium cation and [PF6]− and [NTf2]− anions were studied and compared to Nafion. It resulted that both ILs show better proton mass transfer and diffusion coefficient than Nafion. The data implied the presence of water microclusters permeating through [hmim][PF6]-SILM to assist the proton transfer. This mechanism could not be assumed in the case of [NTf2]− containing IL. Ion transport numbers of K+, Na+, and H+ showed that the IL with [PF6]− anion could be beneficial in terms of reducing ion transfer losses in MFCs. Moreover, the conductivity of [bmim][PF6]-SILM at low electrolyte concentration (such as in MFCs) was comparable to Nafion.

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