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Related Experiment Videos

Flocs through the looking glass.

B Jefferson1, P Jarvis, E Sharp

  • 1School of Water Sciences, Cranfield University, Cranfield, Bedfordshire, MK43 0AL, United Kingdom. b.jefferson@cranfield.ac.uk

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|February 3, 2005
PubMed
Summary
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Hydrophobic organic matter in raw water is easily removed, forming flocs. Fulvic acid fraction (FAF) creates smaller, compact flocs and influences water

Area of Science:

  • Water treatment
  • Colloid and surface chemistry
  • Environmental science

Background:

  • Raw water composition significantly impacts water treatment processes.
  • Understanding organic matter fractions is crucial for efficient flocculation.
  • Hydrophobicity plays a key role in the behavior of organic matter in water.

Purpose of the Study:

  • To investigate the influence of raw water organic matter composition on flocculated suspension properties.
  • To characterize four organic fractions based on hydrophobicity.
  • To analyze the impact of these fractions on floc structure and zeta potential.

Main Methods:

  • Separation of organic matter into four fractions based on hydrophobicity.
  • Mesoscale, microscale, and nanoscale analysis of flocculated suspensions.

Related Experiment Videos

  • Zeta potential measurements.

    • Main Results:

    • Hydrophobic fractions are dominant in raw water and are readily removed.
    • Fulvic acid fraction (FAF) forms smaller, more compact flocs compared to other fractions.
    • Hydrophilic fractions result in open, dendritic floc structures.
    • FAF significantly influences the raw water's zeta potential.

    Conclusions:

    • The hydrophobicity of organic matter is a critical factor in raw water treatment.
    • FAF is a key determinant of floc properties and zeta potential.
    • Targeting hydrophobic fractions and FAF can optimize flocculation processes.