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Related Concept Videos

Dialysis01:15

Dialysis

Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
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Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
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Dye/water separation through supported liquid membrane extraction.

Grace M Nisola1, Eulsaeng Cho, Arnel B Beltran

  • 1Energy and Environment Fusion Technology Center (E(2)FTC), Department of Environmental Engineering and Biotechnology, Myongji University, San 38-2 Namdong, Cheoingu, Yongin City, Gyeonggi 449-728, South Korea. ace.nisola@gmail.com

Chemosphere
|June 18, 2010
PubMed
Summary
This summary is machine-generated.

This study enhances Rhodamine 6G dye separation from water using a blended liquid membrane system. Polysiloxane blending improved membrane stability and dye extraction efficiency.

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Area of Science:

  • Environmental Chemistry
  • Separation Science
  • Materials Science

Background:

  • Synthetic dyes like Rhodamine 6G pose environmental challenges.
  • Supported Liquid Membranes (SLMs) offer potential for efficient dye separation.
  • Optimizing SLM composition is crucial for enhanced performance and longevity.

Purpose of the Study:

  • To investigate the separation of Rhodamine 6G (R6G) from water using blended organic liquids in an SLM system.
  • To evaluate the efficacy of polysiloxane liquids as stabilizing agents in the liquid membrane.
  • To determine optimal conditions for dye extraction and assess the stability of the developed SLM.

Main Methods:

  • Utilized an SLM extraction system with octyl alcohol (OcOH) as the extractant and polysiloxane as a stabilizer.
  • Compared poly (phenyl methyl) siloxane (PPMS) and poly (octyl methyl) siloxane as blending agents.
  • Investigated the effect of feed solution pH, blending ratio (OcOH/PPMS), and hydrodynamic conditions on dye separation.

Main Results:

  • Poly (phenyl methyl) siloxane (PPMS) demonstrated superior performance as a blending agent compared to poly (octyl methyl) siloxane.
  • Optimal dye extraction was achieved at a feed solution pH of 1, yielding a distribution coefficient K(D) of 18.
  • A 1:1 (w/w) OcOH/PPMS blend significantly enhanced SLM longevity (>98% retention after 15 h) compared to pure OcOH SLMs.
  • Dye extraction followed Langmuir adsorption principles, with transport coefficients decreasing at higher feed concentrations due to saturation effects.

Conclusions:

  • Blended organic liquids, particularly with PPMS, significantly improve the stability and longevity of SLMs for Rhodamine 6G separation.
  • The developed SLM system demonstrates effective dye separation under optimized conditions, showing promise for wastewater treatment applications.
  • Understanding mass transfer limitations and hydrodynamic effects is key to further optimizing SLM performance and stability.