Cloud Point Extraction For Separation Of Some Metal Ions From Aqueous Solutions By Using Polyethylene Glycol As A Surfactant

2017 ◽  
pp. 1
Author(s):  
Rihab H. Ezeldin
Keyword(s):  
Polyethylene Glycol ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Cloud Point ◽  
Cloud Point Extraction

Surfactivity of a Series of Nonionic Fluorocarbon Surfactant − Perfluorousnonenyl Polyethylene Glycol Ether

2015 ◽  
Vol 1101 ◽  
pp. 261-267
Author(s):  
Hong Xin Shi ◽  
Hao Miao Zhou ◽  
Hai Min Shen ◽  
Hong Ke Wu
Keyword(s):  
Polyethylene Glycol ◽  
Aqueous Solutions ◽  
Cloud Point ◽  
High Surface ◽  
Fluorocarbon Surfactant ◽  
Foaming Property ◽  
Lower Cloud ◽  
Surface Performance ◽  
Adsorption Quantity ◽  
High Surface Activity

The surfactivity of nonionic fluorocarbon surfactants, polyethylene glycol perfluoro-nonyl monoether (C9F17-PEG-n) and diether (C9F17-PEG-n-C9F17), was systematically investigated, including the surface tensions (γ), critical micelle concentration (CMC), cloud point, foaming property and emulsifiability. The relation between their surface performance and their chemical structure of C9F17-PEG-n and C9F17-PEG-n-C9F17were studied. The result showed that this series of fluorocarbon surfactant possessed high surface activity, the CMC < 2.8 × 10-4mol/L and the γCMC< 25 mN/m. Compared to C9F17–PEG-n, C9F17-PEG-n-C9F17have smaller minimum molecular area (Amin), greater saturated adsorption quantity (Γm), lower cloud point, poorer emulsifiability in toluene and greater foaming volume for their aqueous solutions. For either C9F17-PEG-n or C9F17-PEG-n-C9F17, with the increase of the PEG molecular weight (PEG-n), Γmdeclines, Aminincreases and the emulsifiability in toluene becomes better, the CMC, γCMCand cloud point of their aqueous solutions increases, and their foaming volumes increase first and then decline, getting the maximum value at n=1000.

Complex-forming organic ligands in cloud-point extraction of metal ions: A review

Talanta ◽  
2013 ◽  
Vol 110 ◽  
pp. 202-228 ◽  
Author(s):  
K. Pytlakowska ◽  
V. Kozik ◽  
M. Dabioch
Keyword(s):  
Metal Ions ◽  
Cloud Point ◽  
Cloud Point Extraction ◽  
Organic Ligands

scholarly journals Cloud Point Extraction for the Determination of Different Metal Ions by Using Bis(2-Acetyl Pyridine 4-Phenyl 3-Thiosemicarbazone) as Complexing Reagent

2019 ◽  
Vol 62 (2) ◽  
pp. 76-81
Author(s):  
Ambreen Shah ◽  
Fayyaz Ahmed Keerio ◽  
Saima Qayyum Memon ◽  
Ghulam Zuhra Memon
Keyword(s):  
Metal Ions ◽  
Cloud Point ◽  
Cloud Point Extraction ◽  
Sodium Dodecyl ◽  
Chelating Agent ◽  
Absorption Spectrometry ◽  
Micellar Phase ◽  
Flame Atomic Absorption ◽  
Effects Of Ph

A new method of cloud point extraction was determined for preconcentration and determination of different metal ions like copper(II), nickel(II) and cobalt(II) ions. The complexation has been done by bis(2-acetyl pyridine 4-phenyl 3-thiosemicarbazone) (APPT) using sodium dodecyl sulphate (SDS) as surfactant. Metal ions are extracted into the phase rich in SDS after centrifugation. Initially, micellar phase was dissolved in 10 mL of deionized water then acidified with 0.5 mol/L HNO3, enhanced the surfactant- rich phase and analyzed by flame atomic absorption spectrometry (FAAS). The effects of pH, the concen- trations of metal ions and chelating agent (APPT), volume of surfactant (SDS), equilibration temperature and time were studied on CPE. The preconcentration factor obtained was 25 and the limits of detection(DL) obtained for cobalt(II), nickel(II) and copper(II) were 1.5, 1.7 and 2.4 ng/mL, respectively. This method of preconcentration was effectively useful for the determination of cobalt(II), nickel(II) and copper(II) in water samples.

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