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Related Concept Videos

Dialysis01:15

Dialysis

635
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 Exchange01:17

Ion Exchange

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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...
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Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

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Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

557
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Related Experiment Video

Updated: Jun 23, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Adsorbent-Embedded Polymeric Membranes for Efficient Dye-Water Treatment.

Junaid Saleem1, Zubair Khalid Baig Moghal2, Snigdhendubala Pradhan1

  • 1Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha 5825, Qatar.

Polymers
|June 19, 2024
PubMed
Summary

This study developed novel adsorbent-embedded polymeric membranes for efficient dye removal, eliminating the need for separate filtration. These reusable membranes, made from waste materials, show high adsorption capacity for methylene blue.

Keywords:
mineral-filled membranesplastic wastepolyethylene and mixed-matrix membranespolymeric films

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Area of Science:

  • Materials Science
  • Environmental Engineering
  • Polymer Chemistry

Background:

  • Traditional adsorbents require separate filtration, increasing complexity and cost.
  • Developing integrated adsorbent-polymer systems is crucial for efficient water purification.

Purpose of the Study:

  • To create adsorbent-embedded polymeric membranes for dye removal without additional filtration.
  • To utilize waste polyethylene and calcium carbonate for sustainable membrane fabrication.

Main Methods:

  • Adsorbent integration into a polymer matrix via dissolution-dispersion, spin-casting, and heat-stretching.
  • Fabrication of thin, porous membranes from waste polyethylene and calcium carbonate.
  • Investigating parameters like polymer-adsorbent ratio, dye concentration, and annealing temperature.

Main Results:

  • Membranes exhibited selective dye capture and water permeability.
  • Langmuir isotherm best described equilibrium data, with maximum adsorption capacities of 35 mg/g (25 °C) and 43 mg/g (45 °C).
  • Recyclable membranes achieved 97% dye removal efficiency.

Conclusions:

  • Adsorbent-embedded polymeric membranes offer a promising template for efficient dye removal.
  • The developed membranes are cost-effective, sustainable, and reusable.
  • Tailoring adsorbents can further enhance adsorption capacity and efficiency.