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ENHANCED ADSORPTION OF PERFLUORO ALKYL SUBSTANCES IN GROUNDWATER: DEVELOPMENT OF A NOVEL IN-SITU GROUNDWATER REMEDIATION METHOD
Aly, Y.H., Ph.D. dissertation, University of Minnesota, 117 pp, 2019
This thesis explores the amendment of natural soil by two cationic coagulants (polydiallyldimethylammonium chloride [PDM] and poly (epichlorohydrin-dimethyl) amine [PA]) in order to increase adsorption and retention of PFAS in groundwater. PFAS adsorption onto natural soil was increased significantly based on batch and column tests. 19Fluorine-NMR spectra and PFOS ion-specific electrode analysis indicated that perfluoro carboxylates (PFCAs) were strongly bound in a solution of PA and PDM. There was little release detected, indicating that PFAS are strongly bound in solution and that this binding interaction potentially reduces bioavailability of enhancers when bound with PFAS. https://conservancy.umn.edu/handle/11299/202916
This thesis explores the amendment of natural soil by two cationic coagulants (polydiallyldimethylammonium chloride [PDM] and poly (epichlorohydrin-dimethyl) amine [PA]) in order to increase adsorption and retention of PFAS in groundwater. PFAS adsorption onto natural soil was increased significantly based on batch and column tests. 19Fluorine-NMR spectra and PFOS ion-specific electrode analysis indicated that perfluoro carboxylates (PFCAs) were strongly bound in a solution of PA and PDM. There was little release detected, indicating that PFAS are strongly bound in solution and that this binding interaction potentially reduces bioavailability of enhancers when bound with PFAS. https://conservancy.umn.edu/handle/11299/202916
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