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Functionalized polystyrene microspheres as Cryptosporidium surrogates.

Lu Liu1, Yinan Wang1, Ravin Narain2

  • 1Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2R3, Canada; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2R3, Canada.

Colloids and Surfaces. B, Biointerfaces
|December 28, 2018
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Summary
This summary is machine-generated.

Researchers developed modified microspheres as effective surrogates for Cryptosporidium oocysts in water filtration studies. These surrogates mimic surface properties, aiding in understanding pathogen removal in drinking water treatment.

Keywords:
CryptosporidiumPacked-bed columnQCM-DSurrogates

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Area of Science:

  • Environmental Science
  • Microbiology
  • Water Treatment Engineering

Background:

  • Cryptosporidium is a waterborne protozoan pathogen causing gastrointestinal illness.
  • Surface water used for drinking water often contains Cryptosporidium.
  • Filtration is key for Cryptosporidium removal, but oocyst-filter interactions are poorly understood.

Purpose of the Study:

  • To develop and validate suitable surrogates for Cryptosporidium oocysts.
  • To investigate the interactions between Cryptosporidium/surrogates and filter media.
  • To understand the impact of surface properties on oocyst transport in porous media.

Main Methods:

  • Modified polystyrene microspheres mimicking Cryptosporidium surface properties.
  • Quartz Crystal Microbalance with Dissipation monitoring (QCM-D) for molecular-scale analysis.
  • Laboratory-scale sand-packed column experiments for transport studies.

Main Results:

  • Surface charge and hydrophobicity significantly influence Cryptosporidium attenuation and transport.
  • Modified microspheres exhibited comparable surface properties and behaviors to live oocysts.
  • Copolymers-modified microspheres demonstrated suitable adsorption kinetics and transport in filter columns.

Conclusions:

  • Modified microspheres are appropriate surrogates for studying Cryptosporidium filtration.
  • Understanding surface characteristics is crucial for predicting Cryptosporidium transport.
  • This research enhances the evaluation of Cryptosporidium attenuation in aquatic environments.