Remediation Technology Summit


Dung Nguyen
Dung Nguyen

Environmental Engineer/Laboratory Manager
CDM Smith

Mr. Nguyen is an environmental engineer experienced with soil and groundwater remediation investigation, design, implementation, sampling, and monitoring activities. His experience includes field program support, design support, field sampling for remedial investigations under laboratory as well as field settings. He has designed, set up, and executed various bench-scale treatability studies focusing on developing innovative remedial technologies such as gaseous electron donor injection (GEDIT), in situ biogeochemical transformation, in situ chemical oxidation (ISCO), in situ chemical reduction (ISCR), and in situ enhanced anaerobic bioremediation (EAB).

POSTER PRESENTATION

Evaluation of PFAS Removal Efficacy Using Commercially-Available GACs and Ion Exchange Resins – A Bench-Scale Treatability Study

A bench-scale treatability study was conducted to evaluate the efficacy of a number of commercially-available granular activated carbons (GACs) and ion exchange resins (IX resins) in removing perfluoroalkyl substances (PFAS) in impacted drinking water wells at a confidential drinking water treatment facility in Eastern United States. The rapid small-scale column test (RSSCT) experimental approach was employed to minimize the study duration as well as the volume of site-specific groundwater required for testing. Impacts of residual chlorine removal and GAC-pre-treatment on treatment media’s longevity, and regenerability of the IX resins using brine solutions were also evaluated. Preliminary results indicate that different GAC and IX resin types behave differently with respect to PFAS removal efficacy. In addition, shorter-chained PFAS tend to break through faster than their longer-chained counterparts. Brine regeneration was generally ineffective in prolonging the longevity of the two IX resins tested.


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