Calixarenes as Ligands in Environmentally-Benign Liquid-Liquid Extraction Media

2000 ◽  
pp. 223-236 ◽  
Author(s):  
Ann E. Visser ◽  
Richard P. Swatloski ◽  
Deborah H. Hartman ◽  
Jonathan G. Huddleston ◽  
Robin D. Rogers
Keyword(s):  
Liquid Extraction ◽  
Environmentally Benign ◽  
Liquid Liquid Extraction

Aqueous Polymeric Solutions as Environmentally Benign Liquid/Liquid Extraction Media

1999 ◽  
Vol 38 (7) ◽  
pp. 2523-2539 ◽  
Author(s):  
Jonathan G. Huddleston ◽  
Heather D. Willauer ◽  
Scott T. Griffin ◽  
Robin D. Rogers
Keyword(s):  
Liquid Extraction ◽  
Environmentally Benign ◽  
Liquid Liquid Extraction ◽  
Polymeric Solutions

Hydrophobic Deep Eutectic as a New Solvent for Liquid-Liquid Extraction and Its Potential Application in Ligandless Extraction of Cu (II)

2020 ◽  
Vol 7 (1) ◽  
pp. 32-39
Author(s):  
Nur Hidayah Sazali ◽  
Tham Wei Jie ◽  
Nurul Yani Rahim
Keyword(s):  
Contact Time ◽  
Capric Acid ◽  
Cost Effective ◽  
Liquid Extraction ◽  
Environmentally Benign ◽  
Optimum Conditions ◽  
Initial Concentration ◽  
Liquid Liquid Extraction ◽  
Ft Ir ◽  
The Cost

Background: The cost-effective and environmentally benign solvent of hydrophobic deep eutectic (DES) was prepared for the removal of Cu (II) from aqueous solution. Hydrophobic DES has been gaining increasing attention from researchers for the replacement of hazardous solvent consumption in liquid-liquid extraction (LLE). Objectives: To synthesize the hydrophobic DES and optimize the parameters for ligandless LLE using DES, and LLE with DES-LIG, respectively. Materials and Methods: The fatty acid-based DES was prepared using a mixture of capric acid (C10) and lauric acid (C12) as a potential solvent for the extraction of Cu (II). The DES was characterized via FT-IR, NMR, and TGA. The removal percentage of Cu (II) was compared between ligandless LLE and other conventional LLE techniques. DES was used as the solvent in the ligandless LLE, while 1,10-phenanathroline ligand with DES (DES-LIG) was used in the conventional LLE techniques. The optimized parameters such as pH, initial concentration, and contact time for Cu (II) removal were studied and analyzed using atomic absorption spectroscopy (AAS). Results and Discussion: The ligandless LLE with DES demonstrated the highest removal percentage of Cu (II) at optimum conditions of pH 8, initial concentration of 80 μg mL-1, and contact time of 45 minutes. Conclusion: The removal of Cu (II) was more effective in ligandless LLE using DES.

Comparison of Sorption and Extraction Methods for Recovery of Trace Organics from Water

1983 ◽  
Vol 15 (6-7) ◽  
pp. 149-159 ◽  
Author(s):  
V C Blok ◽  
G P Slater ◽  
E M Giblin
Keyword(s):  
Solvent Extraction ◽  
Methylene Chloride ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Standard Mixture ◽  
Liquid Liquid Extraction ◽  
Trace Organics ◽  
Tenax Gc

Several commercially available adsorbents were compared with solvent extraction methods for their utility in recovering trace organics from water. The adsorbents examined included Amberlite XAD-2, XAD-4 and XAD-8, Ambersorb XE340 and XE348 and Tenax-GC. All were found to produce high artifact levels, even after extensive clean-up, making them unsuitable for the analysis of trace organics in water. Quantitatively, Likens-Nickerson or continuous liquid-liquid extraction with méthylene chloride gave better recoveries than the adsorbents. Qualitatively, extractive methods were preferred as they yielded much lower levels of impurities than the adsorbents. These methods of recovering trace organics were evaluated using a standard mixture of compounds added to the water at a level of 55 µg/l. Likens-Nickerson extraction gave comparable recoveries of this mixture at 55 µg/l and 11 µg/l.

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