Assessing the hazard from viruses in wastewater recharge of urban sandstone aquifers

E. Joyce, K. Charles, S. H. Rahman, M. F. Aller, V. Durand, M. S. Riley, R. B. Greswell, J. C. Renshaw, R. Mackay, M. O. Rivett, A. Hart, S. Pedley, J. H. Tellam

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

2 Citations (Scopus)
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Abstract

Increasing water demand in urban areas is focusing attention on the possibilities of the re-use of urban wastewaters, waters that often contain human and animal (including avian) viruses. In urban red-bed sandstone aquifers in the UK, which are predominantly matrix flow systems, evidence from well and piezometer monitoring shows that viable human viruses can be transported to depths of at least 80 m. The aim of the studies described here is therefore to determine the processes controlling the virus transport as a basis for risk assessment. Laboratory column experiments show that virus breakthrough is severely attenuated in synthetic groundwater solutions, some viruses remaining effectively irreversibly attached to the rock: attenuation capacity is only slowly reduced as more viruses are eluted. However, addition of silica colloids (which when injected by themselves are also severely attenuated) to the virus solutions, results in breakthrough of the injected virus particles and release of previously attached virus particles. Forced-gradient tracer field experiments suggest that (severely attenuated) virus breakthrough occurs, but only through specific pathways. Current fieldwork is aimed at determining the location, and hence the hydraulic and geochemical characteristics of these pathways. It appears, therefore, that virus attenuation is reduced by the presence of other colloidal matter, low ionic strength, and continuous virus loading, and that conditions for transport occur only in specific pathways. Future laboratory work will be aimed at further quantifying these processes and relating them to the petrographic and geochemical properties of the various sandstone (hydro)lithofacies which the field experiments indicate are important. This will provide the understanding necessary for a process-based risk assessment procedure. 

Original languageEnglish
Title of host publicationSecuring Groundwater Quality in Urban and Industrial Environments
Subtitle of host publicationProceedings of the 6th International Groundwater Quality Conference
EditorsMichael G. Trefry
Pages319-326
Number of pages8
Volume324
Publication statusPublished - 1 Dec 2008
EventGroundwater Quality 2007 Conference - Securing Groundwater Quality in Urban and Industrial Environments, GQ'07 - Fremantle, WA, United Kingdom
Duration: 2 Dec 20087 Dec 2008

Conference

ConferenceGroundwater Quality 2007 Conference - Securing Groundwater Quality in Urban and Industrial Environments, GQ'07
CountryUnited Kingdom
CityFremantle, WA
Period2/12/087/12/08

Keywords

  • artificial recharge
  • phage
  • sandstone
  • virus
  • wastewater

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    Joyce, E., Charles, K., Rahman, S. H., Aller, M. F., Durand, V., Riley, M. S., Greswell, R. B., Renshaw, J. C., Mackay, R., Rivett, M. O., Hart, A., Pedley, S., & Tellam, J. H. (2008). Assessing the hazard from viruses in wastewater recharge of urban sandstone aquifers. In M. G. Trefry (Ed.), Securing Groundwater Quality in Urban and Industrial Environments: Proceedings of the 6th International Groundwater Quality Conference (Vol. 324, pp. 319-326)