Thought Leaders Series: Mechanisms for PFAS contaminant transportation

Start time: 1.00pm AEDT. Hear from subject matter experts as they discuss PFAS contaminant.
Thought Leaders Series: Mechanisms for PFAS contaminant transportation

About this event

Geosynthetic clay liners (GCLs) are now generally accepted as part of a robust composite barrier systems for many landfills and leachate ponds, mining waste containment facilities, heap leach pads and industrial waste repositories.

The primary function of the GCL is to prevent or reduce the flow of fluids which may contain contaminants, such as Per- and Polyfluoroalkyl Substances (PFAS). PFAS pose undesired risks to the performance of barrier systems, including GCLs that rely on the hydraulic performance of bentonite for effective containment of wastes.

Join us as subject matter experts talk through the high mobility of PFAS, their known transport and partitioning mechanisms will be discussed from a clay science perspective, showcasing the importance of matching barrier performance to leachate chemistry.

Our speakers will discuss recent quantitative research data relating to the hydraulic performance and PFAS transport through a standard GCL containing only bentonite and a hybrid GCL containing a blend of bentonite and a high specific surface area activated carbon.

Further information

Key takeaways

  • Learn about transportation of contaminant (PFAS) through Bentonite and Hybrid Geosynthetic Barriers Containing Activated Carbon
  • Education around PFAS in landfill leachates
  • Key performance aspects of activated carbon and how to specify hybrid GCLs with this component for containment projects

Who should attend?

Civil Engineers, Consulting Engineers, Environmental Engineers and Designers along with others with an interest in soil contamination prevention.

About the speakers


Will Gates
Associate Professor, Deakin University

Will Gates has worked with clay minerals, and in particular bentonites and bentonite products, for 30 years.  Since 2006 he has focused much of his research on the performance attributes of bentonites used in geosynthetic clay liners. That research has led to bentonite specifications being adapted by the Victorian EPA 2010 BPEM Landfill Design Guidelines.
More recently he has developed various instrumental methods to better probe the fundamental mechanisms of water-clay behaviour, with the goal to better understand leachate-barrier interactions.  He has been an active member of, and has promoted Australian bentonites within, both the USA-based Clay Minerals Society and the Australian Clay Minerals Society.

Daniel Gibbs
General Manager of Technical, Research and Innovation
Geofabrics Australasia

Daniel is the General Manager of Technical, Research and Innovation at the Geofabrics’ Centre for Geosynthetic Research, Innovation and Development (GRID). The GRID provides solutions to engineering and environmental challenges through geotechnical review, empirical research and product development. Daniel has over 17 years of quality management, research, specification and method development, auditing, innovation, and analytical techniques in Geosynthetics with a specific focus on Bentonite and Geosynthetic Clay Liners. He has authored or co-authored 11 research papers on Geosynthetic performance and is an active member of various professional bodies including ASTM Committees D35 on Geosynthetics and D18 on Soil and Rock and The Australian Chapter of the International Geosynthetics Society (ACIGS).


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PLEASE NOTE: This event is available as a webinar only. Register to access webinar details.

21 / 10 / 2021 - 01:00 pm to 02:30 pm
Registration Closes
21 / 10 / 2021 01:00 pm
  • Member Rate: $0.00 ($0.00 excl. GST)
  • Technical Society Member Rate: $0.00 ($0.00 excl. GST)
  • Student: $0.00 ($0.00 excl. GST)
  • Non-Member Rate: $0.00 ($0.00 excl. GST)
Event Contact
  • Contact:
    Engineers Australia Member Services
  • Phone:
    1300 653 113
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