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Related Experiment Videos

Forces dictating colloidal interactions between viruses and soil.

S Chattopadhyay1, R W Puls

  • 1National Risk Management Research Laboratory, Subsurface Protection and Remediation, Ada, OK 74820, USA. chattopadhyay.sandip@epamail.epa.gov

Chemosphere
|July 20, 2000
PubMed
Summary

Attractive van der Waals forces are key to virus sorption on soil particles. This study quantifies forces influencing virus transport in environmental matrices, using bacteriophages and clays to understand soil sorption mechanisms.

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Area of Science:

  • Environmental Science
  • Soil Science
  • Microbiology

Background:

  • Understanding virus fate and transport in soil and aquatic environments is crucial for environmental risk assessment.
  • Sorption of viruses onto soil particles influences their mobility and persistence.
  • Classical DLVO theory provides a framework for analyzing interaction forces between particles.

Purpose of the Study:

  • To investigate the forces governing the sorption of viruses on soil particles.
  • To quantify electrostatic and van der Waals forces involved in virus-soil interactions.
  • To determine the predominant forces driving virus sorption on clay surfaces.

Main Methods:

  • Applied classical DLVO theory to calculate repulsive electrostatic and attractive van der Waals forces.

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  • Utilized bacteriophages as model sorbates and various clays as model sorbents.
  • Employed equations for free energy change (deltaG) that account for sorbent surface roughness.

    • Main Results:

    • Calculated repulsive electrostatic and attractive van der Waals forces between bacteriophages and clay particles.
    • Found that attractive van der Waals forces play a predominant role in the sorption process.
    • Demonstrated the influence of surface roughness on the energy changes during sorption.

    Conclusions:

    • Attractive van der Waals forces are the primary drivers of bacteriophage sorption onto clay surfaces.
    • The findings contribute to a better understanding of virus transport and fate in soil environments.
    • This research highlights the importance of considering surface interactions in environmental modeling of virus behavior.