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Related Concept Videos

Filtration00:53

Filtration

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Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
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Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding
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Self-Assembled Graphene Composites for Flow-Through Filtration.

Deepthi Varghese, Jennifer L Bento, Shawn P Ward

    ACS Applied Materials & Interfaces
    |June 4, 2020
    PubMed
    Summary

    Pristine graphene creates conductive filters for continuous water purification, offering a cost-effective and eco-friendly alternative to graphene oxide for removing organic dyes.

    Keywords:
    dye adsorptionflow-through filtrationgraphenepolystyrene compositeresistive heating

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    Area of Science:

    • Materials Science
    • Environmental Engineering
    • Nanotechnology

    Background:

    • Graphene-based materials are explored for water treatment.
    • Existing methods often use costly or environmentally challenging graphene oxide.
    • Batch processes limit scalability for water purification.

    Purpose of the Study:

    • To develop electrically conductive filters using pristine graphene for continuous water treatment.
    • To investigate the formation mechanism of graphene-templated polymer foams.
    • To assess the efficiency of these filters for organic dye adsorption.

    Main Methods:

    • Spontaneous exfoliation of pristine graphene from natural flake graphite.
    • Templating polymer foam formation using graphene-stabilized emulsions.
    • Characterization using acoustic spectroscopy and electron microscopy.
    • Filtration experiments for organic dye adsorption.

    Main Results:

    • Electrically conductive filters were successfully fabricated using pristine graphene.
    • The filters demonstrated continuous water treatment capability.
    • Resistive heating was shown as a viable method for filter cleaning.
    • A correlation between graphite concentration, temperature, and cell size was established.

    Conclusions:

    • Pristine graphene can be effectively used as a surfactant to create conductive filters for water purification.
    • This continuous, cost-effective, and eco-friendly approach offers advantages over existing graphene-based methods.
    • The developed filters show promise for efficient organic dye removal and regeneration.