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Related Concept Videos

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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Related Experiment Video

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Author Spotlight: Optimizing Hollow-Fiber Membranes for Continuous Liquid-Liquid Extraction of Medium-Chain Fatty Acids
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Using Tannic-Acid-Based Complex to Modify Polyacrylonitrile Hollow Fiber Membrane for Efficient Oil-In-Water

Micah Belle Marie Yap Ang1, Wei-Lin Hsu1, You-Syuan Wang1

  • 1R&D Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan.

Membranes
|March 29, 2023
PubMed
Summary

This study enhanced polyacrylonitrile (PAN) membranes for oil-water separation using tannic acid (TA) and FeIII complex. The modified membrane shows improved antifouling and reusability, crucial for wastewater treatment.

Keywords:
hollow fibermembraneoil–water separationpolyacrylonitrile

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Area of Science:

  • Materials Science
  • Environmental Engineering
  • Chemical Engineering

Background:

  • Membrane separation is a cost-effective wastewater treatment method.
  • Polyacrylonitrile (PAN) hollow fiber membranes offer chemical resistance but suffer from low antifouling properties.
  • Efficient oil-water separation is vital for resource reuse and economic processes.

Purpose of the Study:

  • To enhance the antifouling properties and separation efficiency of PAN hollow fiber membranes.
  • To investigate the surface modification of PAN membranes using tannic acid (TA) and FeIII complex.
  • To evaluate the impact of different reaction times on membrane performance.

Main Methods:

  • Surface modification of PAN hollow fiber membranes using tannic acid (TA) and FeIII complex.
  • Investigating the effect of varying reaction times on the modification process.
  • Testing membrane performance using oil-in-water emulsions and measuring water flux and oil adhesion.

Main Results:

  • The TA-FeIII complex coating did not impede water flux through the PAN membrane pores.
  • Oil-in-water emulsion flux increased from 50 to 66 LMH after modification, indicating reduced oil adhesion.
  • The modified membrane exhibited superior antifouling capabilities and enhanced reusability compared to the pristine membrane.

Conclusions:

  • Hydrophilic modification with TA-FeIII complex significantly improves the performance of PAN membranes for oil-water separation.
  • The enhanced antifouling and reusability make TA-FeIII modified PAN membranes suitable for wastewater treatment.
  • Surface modification is a viable strategy to overcome the limitations of conventional membranes.