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 DITHIZONE MODIFIED SILVER ELECTRODE FOR THE DETERMINATION OF METAL IONS IN AQUEOUS SOLUTION

2016 ◽  
Vol 20 (1) ◽  
pp. 197-204 ◽  
Author(s):  
Mohamad Aiman Firdaus Othman ◽  
Azrilawani Ahmad ◽  
Hafiza Mohamed Zuki
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Silver Electrode

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.

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.

Report Paper 4: Determination of Bonds between Metal Ions and Additives by Means of Surface Pressure and Infrared Spectra

1969 ◽  
Vol 184 (12) ◽  
pp. 201-206
Author(s):  
S. Friberg ◽  
H. Müller
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Infrared Spectra ◽  
Surface Pressure ◽  
Metal Ion ◽  
Specific Information ◽  
Bond Properties ◽  
Monomolecular Layers ◽  
Surface Balance

A surface balance of the Langmuir type was used to determine the effect of different metal ion specia in an aqueous solution on the surface pressure of monomolecular layers of additives. To gain more specific information about the bond properties, the monolayers were collected and the infrared spectra recorded. It is suggested that the results can be used as data when the bonds between the additives and the atom groups on a metal surface are being considered.

scholarly journals A chemical probe technique for the determination of reactive halogen species in aqueous solution: Part 2 – chloride solutions and mixed bromide/chloride solutions

2006 ◽  
Vol 6 (1) ◽  
pp. 941-979 ◽  
Author(s):  
C. Anastasio ◽  
B. M. Matthew
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Method Development ◽  
Companion Paper ◽  
Chemical Probe ◽  
Chloride Solutions ◽  
Reactive Halogen Species ◽  
A New Technique ◽  
Halogen Species

Abstract. Although reactive halogen species (X*=X●, ●X2−, X2 and HOX, where X=Br, Cl, or I) are important environmental oxidants, relatively little is known about their kinetics in condensed phases such as seawater and sea-salt particles. Here we describe a new technique to determine reactive chlorine and bromine species in aqueous solutions by using allyl alcohol (CH2=CHCH2OH) as a chemical probe. This probe is combined with competition kinetics in order to determine steady state concentrations of X*(aq). In some cases the technique also can be used to determine the rates of formation and lifetimes of X* in aqueous solution. In a companion paper we reported the results of our method development for aqueous solutions containing only bromide (Br−). In this paper, we discuss method development for solutions containing chloride (Cl−) alone, and for solutions containing both bromide and chloride.

scholarly journals A Novel Method for Determination of Protein in Human Serum Utilizing the Trihydroxylphenylfluorone-Molybdenum(VI) Complex as a Probe by Fluorescence Spectrometry

2007 ◽  
Vol 90 (1) ◽  
pp. 238-243 ◽  
Author(s):  
Qin Wei ◽  
Hongmin Ma ◽  
Caihong Duan ◽  
Jin Wang ◽  
Shuyuan Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Amino Acids ◽  
Detection Limit ◽  
Human Serum ◽  
Fluorescence Intensity ◽  
Acetate Buffer Solution ◽  
Buffer Solution ◽  
Protein Assay ◽  
Novel Method

Abstract The fluorescence intensity of the trihydroxylphenylfluorone-molybdenum(VI) Mo(VI) complex is quenched by protein. Based on this, a novel method for protein assay in aqueous solution was developed. With pH 3.75 acetic acidsodium acetate buffer solution, in the presence of p-octyl polyethylene glycol phenyl ether microemulsion, the quenched fluorescence intensity is proportional to the concentration of bovine serum albumin (BSA) in the range of 07.00 μg/mL, and the detection limit of BSA is 5.65 ng/mL. There is no interference from amino acids and most metal ions. The method developed in this paper has been used for the successful determination of protein in human serum.

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