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Related Experiment Videos

Extractive ultrafiltration.

J C Watters1, D A Miller, T T Le

  • 1Chemical Engineering Department, University of Louisville, Kentucky 40292.

Progress in Clinical and Biological Research
|January 1, 1989
PubMed
Summary
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Extractive ultrafiltration effectively removes water contaminants like toluene and monochlorobenzene. Optimal performance is achieved using minimal solvent and surfactant at ambient temperatures.

Area of Science:

  • Environmental Engineering
  • Separation Science
  • Chemical Engineering

Background:

  • Conventional water treatment methods struggle with removing small organic molecules.
  • Extractive ultrafiltration (EUF) offers a novel approach by combining liquid extraction with ultrafiltration.
  • EUF can overcome limitations of traditional membrane processes by emulsifying contaminants.

Purpose of the Study:

  • To investigate the efficacy of extractive ultrafiltration for removing specific organic toxins from water.
  • To optimize operating parameters for extractive ultrafiltration to maximize contaminant removal and permeate flux.
  • To evaluate the impact of temperature, solvent ratio, and surfactant concentration on the EUF process.

Main Methods:

  • The study employed a sequential process of liquid-liquid extraction followed by ultrafiltration.

Related Experiment Videos

  • Toluene and monochlorobenzene were used as model contaminants, extracted into heptane and hexane, respectively.
  • Key parameters including temperature, organic-to-water ratio, and surfactant concentration were systematically varied.

    • Main Results:

    • A five to ten-fold reduction in contaminant concentration was achieved in the permeate water.
    • Permeate fluxes exceeded 60% of the pure water flux, demonstrating process efficiency.
    • Optimal conditions involved ambient temperature, minimal surfactant, and reduced extraction solvent.

    Conclusions:

    • Extractive ultrafiltration is a viable technology for efficient removal of small organic molecules from water.
    • Process optimization is crucial for maximizing performance, with temperature, solvent, and surfactant as key factors.
    • The findings suggest EUF can be a cost-effective and high-flux alternative to conventional separation methods.