scholarly journals Removal of Copper (II), Zinc (II), Cobalt (II), and Nickel (II) Ions by PIMs Doped 2-Alkylimidazoles

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 16
Author(s):  
Elzbieta Radzyminska-Lenarcik ◽  
Kamila Maslowska ◽  
Wlodzimierz Urbaniak
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Cellulose Triacetate ◽  
Methyl Ethyl ◽  
Transport Parameters ◽  
Base Polymer

Polymer inclusion membranes (PIMs) are an attractive approach to the separation of metals from an aqueous solution. This study is concerned with the use of 2-alkylimidazoles (alkyl = methyl, ethyl, propyl, butyl) as ion carriers in PIMs. It investigates the separation of copper (II), zinc (II), cobalt (II), and nickel (II) from aqueous solutions with the use of polymer inclusion membranes. PIMs are formed by casting a solution containing a carrier (extractant), a plasticizer (o-NPPE), and a base polymer such as cellulose triacetate (CTA) to form a thin, flexible, and stable film. The topics discussed include transport parameters, such as the type of carrier, initial fluxes, separation coefficients of copper in relation to other metals, as well as transport recovery of metal ions. The membrane was characterized using AFM and SEM to obtain information on its composition.

scholarly journals Selective Transport of Ag(I) through a Polymer Inclusion Membrane Containing a Calix[4]pyrrole Derivative from Nitrate Aqueous Solutions

2020 ◽  
Vol 21 (15) ◽  
pp. 5348
Author(s):  
Anna Nowik-Zajac ◽  
Iwona Zawierucha ◽  
Cezary Kozlowski
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Aqueous Phase ◽  
Cellulose Triacetate ◽  
Inclusion Membrane ◽  
Selective Transport ◽  
Effective Transport ◽  
Different Temperatures ◽  
Nitrate Solutions

Cellulose-triacetate-based polymer inclusion membranes (PIMs) with different concentrations of a calixpyrrole ester derivative as the membrane carrier were studied to determine their ability to transport Ag(I) from aqueous nitrate solutions. The effects of the concentrations of ion carriers and metal ions, the pH of the source aqueous phase, and stripping agents on the effective transport of Ag(I) were assessed. All studied parameters were found to be important factors for the transport of Ag(I) metal ions. The initial fluxes were determined at different temperatures. The prepared membranes were found to be highly permeable. The selectivity of silver transport from an aqueous solution containing Ag(I), Cu(II), Pb(II), Cd(II), Ni(II), Zn(II), and Co(II) ions was also investigated.

scholarly journals Synthesis of Polymer Inclusion Membranes based on Cellulose Triacetate for Recovery of Lanthanum(III) from Aqueous Solutions

2019 ◽  
Vol 19 (3) ◽  
pp. 288-292 ◽  
Author(s):  
Adam Makowka ◽  
Beata Pospiech
Keyword(s):  
Aqueous Solution ◽  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Polymer Matrix ◽  
Tributyl Phosphate ◽  
Cellulose Triacetate ◽  
Nitrophenyl Octyl Ether ◽  
Source Phase ◽  
Ion Carrier

Abstract Polymer inclusion membrane (PIM) containing cellulose triacetate (CTA) as a polymer matrix and 2-nitrophenyl octyl ether (NPOE) as a plasticizer was developed. This membrane also contained di(2-ethylhexyl)phosphoric acid (D2EHPA) and tributyl phosphate (TBP) as the carriers of metal ions. The facilitated transport of lanthanum(III) from aqueous nitrate(V) solutions across PIM was studied. It was observed that metal ions were transported from the source phase into 2M H2SO4 as the receiving phase. The transport through PIM with D2EHPA as the ion carrier was found as the more effective method of lanthanum(III) removal from the aqueous solution than transport through PIM with TBP as the ion carrier.

Removal of Pb(II) and Cd(II) From Aqueous Solution by Adsorption Using Agrowaste-Modified Kaolinite Clay

2021 ◽  
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Metal Ion ◽  
Low Cost ◽  
Ion Concentration ◽  
Kaolinite Clay ◽  
Adsorbent Surface ◽  
Initial Adsorption ◽  
Adsorption Rates

This study showed that kaolinite clay modified with Moringa oleifera pods is a promising low cost adsorbent for the removal of metals from aqueous solution because the resultant composite has higher adsorption capacities, and hence a better metal ions removal efficiency. The efficiencies of these adsorbents for the removal of Pb (II) and Cd (II) ions from aqueous solutions were studied as a function of pH, time, adsorbate concentration and adsorbent dose. Adsorption results showed that pH did significantly affect removal of heavy metal ions between pH 3 and 6. Increasing contact time and initial metal ion concentration increased the sorption capacity of the adsorbent for the metal ions. Adsorbent dosage indicated mainly surface phenomena involving sharing of electrons between the adsorbent surface and the metal ion species. The adsorption of metal ions from aqueous solutions of both metal ions at different initial metal ion concentrations reduced the initial adsorption rates of the adsorption of Pb (II) and Cd (II) by unmodified and modified kaolinite clay.

Synthesis of “three-legged” tri-dentate podand ligands incorporating long-chain aliphatic moieties, for water remediators, and for isolating metal ions in non-aqueous solution

2018 ◽  
Vol 3 (11) ◽  
Author(s):  
Justin Pothoof ◽  
Michal Ruprecht ◽  
Ben D. Sliwinski ◽  
Ben M. Sosnowski ◽  
Polly R. Fitzgerald ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Ambient Temperature ◽  
Water Remediation ◽  
Schiff’S Base ◽  
Aliphatic Aldehydes ◽  
Long Chain

Abstract Two molecules, each including tris-2-amino-ethyleneamine (tren), have been produced using a Schiff’s base condensation and long-chain, aliphatic aldehydes. The syntheses are straightforward and can be run in air at ambient temperature. The ability of these molecules to complex with metal ions makes them good candidates for water remediation. The ability of these ligands to hold metal ions in 0.03 M non-aqueous solutions was unexpected. Their syntheses and characterization are discussed.

scholarly journals Acetylacetone functionalized magnetic carbon microspheres for the highly-efficient adsorption of heavy metal ions from aqueous solutions

RSC Advances ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 3337-3344 ◽  
Author(s):  
Jie Ma ◽  
Mengya Sun ◽  
Yulan Zeng ◽  
Zhenhua Liu ◽  
Manman Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Solid Phase ◽  
Carbon Microspheres ◽  
Highly Efficient ◽  
Magnetic Carbon

Herein, Acac-C@Fe3O4, a magnetic carbon (C@Fe3O4) modified with acetylacetone (Acac), was first prepared and used as a solid-phase adsorbent for adsorbing some heavy metal ions from aqueous solution.

A novel sensing membrane for the determination of ferric ions in aqueous solutions

2015 ◽  
Vol 7 (7) ◽  
pp. 3089-3095
Author(s):  
Wenjuan Fu ◽  
Xiangfeng Guo ◽  
Lihua Jia ◽  
Ying Ding
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Fluorescence Intensity ◽  
Fast Response ◽  
Ferric Ions ◽  
Sensing Membrane

A new sensing membrane is proposed for the determination of Fe3+ over other common metal ions in an aqueous solution based on the quenching of the fluorescence intensity of the membrane by Fe3+. The fluorescence intensity of the membrane showed distinct changes towards Fe3+ with fast response, satisfactory stability and excellent sensitivity.

scholarly journals Heavy metal ions removal from aqueous solution by xanthate-modified cross-linked magnetic chitosan/poly(vinyl alcohol) particles

RSC Advances ◽  
2017 ◽  
Vol 7 (45) ◽  
pp. 27992-28000 ◽  
Author(s):  
Long Lv ◽  
Nan Chen ◽  
Chuanping Feng ◽  
Jing Zhang ◽  
Miao Li
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Vinyl Alcohol ◽  
Heavy Metal Ions ◽  
Poly Vinyl Alcohol ◽  
Magnetic Chitosan ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Xanthate-modified cross-linked magnetic chitosan/poly(vinyl alcohol) particles (XCMCP) were synthesized and applied to remove Pb(ii) and Cu(ii) ions from aqueous solutions.

scholarly journals The Adsorption of Europium on to Titanium Oxide from Aqueous Solutions

1994 ◽  
Vol 11 (3) ◽  
pp. 187-191 ◽  
Author(s):  
M.A. Rauf ◽  
S.M. Hasany ◽  
M. Ikram ◽  
A.M. Shamsi
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Titanium Oxide ◽  
The Given

The adsorption of europium on to titanium dioxide from aqueous solution at pH 4 has been studied in relation to the concentration of the adsorbate. The conditions for maximum adsorption were optimized and the effects of added cations, anions and other metal ions studied. The oxide was found to separate europium from TeIV, CoII and MnII in appreciable amounts under the given conditions.

scholarly journals PHYTIC ACID: AN ANALYTICAL INVESTIGATION

1961 ◽  
Vol 39 (6) ◽  
pp. 1290-1297 ◽  
Author(s):  
E. C. Brown ◽  
M. L. Heit ◽  
D. E. Ryan
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Phytic Acid ◽  
Titration Curve ◽  
Analytical Investigation ◽  
Acid Base ◽  
Acid Structure

Acid–base titrations in aqueous and non-aqueous solutions, titrations with metal ions, and analyses of various metal phytates support beyond question the 18-acid structure of phytic acid. Six of the hydrogens are too weakly acidic to be ordinarily titratable in water; in aqueous solution, two distinct breaks occur in the titration curve corresponding to the titration of 8 and 12 protons of phytic acid.

Recent progresses in luminescent metal–organic frameworks (LMOFs) as sensors for the detection of anions and cations in aqueous solution

2021 ◽  
Vol 50 (6) ◽  
pp. 1950-1972 ◽  
Author(s):  
Jing Jin ◽  
Juanjuan Xue ◽  
Yanchen Liu ◽  
Guoping Yang ◽  
Yao-Yu Wang
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Metal Organic Frameworks ◽  
Metal Organic ◽  
Anions And Cations

This work mainly reviews the recent progresses in luminescent metal–organic frameworks (LMOFs) as sensors for detecting various metal ions and anions in aqueous solutions.

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