In Situ Remediation Method for Enhanced Sorption of Perfluoro-Alkyl Substances onto Ottawa Sand

Aly, Yousof H.; Liu, Chen; McInnis, Daniel P.; Lyon, Bonnie A.; Hatton, James W.; McCarty, Michael E.; Arnold, William A.; Pennell, Kurt D.; Simcik, Matt F.

doi:10.1061/(asce)ee.1943-7870.0001418

Cited by 32 publications

(36 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because CO2 is more soluble in water than air, assembled columns were initially flushed with CO2 for 5 minutes to replace air trapped in columns during the packing 46 and then saturated with a 10 mM NaCl (Mallinckrodt, ACS reagent) background solution at a flow rate of 0.5 mL/min outside of the glovebox.…”

Section: Column Experimentsmentioning

confidence: 99%

Anisotropic oxidative growth of goethite-coated sand particles in column reactors during 4-chloronitrobenzene reduction by Fe(ii)/goethite

Soroush

Penn

Arnold

2022

Environ. Sci.: Nano

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Column Experimentsmentioning

confidence: 99%

Anisotropic oxidative growth of goethite-coated sand particles in column reactors during 4-chloronitrobenzene reduction by Fe(ii)/goethite

Soroush

Penn

Arnold

2022

Environ. Sci.: Nano

Self Cite

View full text Add to dashboard Cite

show abstract

“…Binding of polyquaternium polymers to soil (eq 11) from Tinker Air Force Base has been studied in detail in a previous study for the same conditions used here. 20 This binding leads to a reduction of the concentration of the polymer in solution. However, soil-bound polymer still binds PFOS (eq 12), although with an affinity expected to be different from that of the dissolved polymer.…”

Section: Resultsmentioning

confidence: 99%

“…Polyquaternium polymers, which are polycationic polymers that are often added to water to remove organic and inorganic anions by coagulation, are also suited for PFOS sequestration. Advantages of their use are their low cost, the ability to inject these polymers as solutions into the subsurface, the rapid reduction in aqueous phase PFOS, and the in situ application . Because there are currently no efficient techniques available for in situ destruction of PFOS, polymer sequestrants are an attractive approach to stop expanding PFAS plumes, effectively immobilizing PFOS.…”

Section: Introductionmentioning

confidence: 99%

“…Two polyquaternium polymers have been used to bind PFOS by electrostatic and nonpolar interactions. , Importantly, it was shown that these polyquaternium polymers bind to Ottawa sand and to soil from Tinker Air Force Base (Oklahoma City, Oklahoma), which immobilizes the PFOS–polymer aggregates and thereby results in effective containment. Although the sequestration of PFOS to Ottawa sand-bound polyquaternium polymers was studied to determine the quantity of PFOS that can be retained, a quantitative understanding of PFOS binding to these polymers and to polymer–soil aggregates under environmental conditions has been lacking.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Remediation of Perfluorooctylsulfonate Contamination by in Situ Sequestration: Direct Monitoring of PFOS Binding to Polyquaternium Polymers

et al. 2019

Self Cite

View full text Add to dashboard Cite

In situ methods for the sequestration of perfluorooctyl-1-sulfonate (PFOS) that are based on PFOS binding to polyquaternium polymers were reported previously, providing an approach to immobilize and concentrate PFOS in situ. To apply these methods in real life, the concentrations of polymers that permit efficient sequestration must be determined. This is only possible if the stoichiometry and strength of PFOS binding to polyquaternium polymers are known. Here, we report on the use of fluorous-phase ion-selective electrodes (ISEs) to determine the equilibrium constants characterizing binding of PFOS to poly(dimethylamine- co -epichlorohydrin) and poly(diallyldimethylammonium) in simulated groundwater and in soil suspensions. We introduce a new method to interpret potentiometric data for surfactant binding to the charged repeat unit of these polyions by combining a 1:1 binding model with the ISE response model. This allows for straightforward prediction and fitting of experimental potentiometric data in one step. Data fit the binding model for poly(diallyldimethylammonium) and poly(dimethylamine- co -epichlorohydrin) chloride in soil-free conditions and in the presence of soil from Tinker Air Force Base. When the total PFOS concentration in a soil system is known, knowledge of these PFOS binding characteristics permits quantitative prediction of the mobile (free) and polymer-bound fractions of PFOS as a function of the concentrations of the polyquaternium polymer. Because the technique reported here is based on the selective in situ determination of the free ionic surfactant, we expect it to be similarly useful for determining the sequestration of a variety of other ionic pollutants.

show abstract

“…These multiply charged polymers are used for a broad variety of applications, including medical studies, 1,2 wastewater treatment, 3 consumer products (up to 3 wt%), 4,5 and environmental contaminant remediation. 6,7 Due to their widespread use, toxicity studies of these compounds have been pursued. Recent findings suggest that common polyquaternium polymers are toxic to eastern mosquitofish, with EC50 values of approximately 1 mg L -1 .…”

Section: Introductionmentioning

confidence: 99%

Indirect Potentiometric Determination of Polyquaternium Polymer Concentrations by Equilibrium Binding to 1-Dodecyl Sulfate

2019

View full text Add to dashboard Cite

Polyquaternium polymers are polycationic polymers that are contained in many hair shampoos and conditioners and are also often added to water to remove organic and inorganic anions by floc formation. While polyquaternium analysis is not trivial, electroanalytical methods have been proposed for their detection using either irreversible emf responses or reversible potential-driven extraction into and out of polymeric sensing membranes. We present here an alternative technique for the determination of a representative polyquaternium polymer, poly(dimethylamine-co-epichlorohydrin) chloride, by equilibrium binding with a singly charged anionic surfactant, 1-dodecyl sulfate. Binding of an anionic surfactant to the polyquaternium polymer simplifies electrochemical detection as the concentration of unbound surfactant can be monitored using the equilibrium Nernstian emf response of ion-exchanger membranes. The latter can be used to determine the nature of the binding interaction and allows for the straightforward determination of polyquaternium polymer concentrations by titration. Fig. 1 Repeat unit structure of poly(dimethylamine-co-epichlorohydrin) chloride.

show abstract

In Situ Remediation Method for Enhanced Sorption of Perfluoro-Alkyl Substances onto Ottawa Sand

Cited by 32 publications

References 42 publications

Anisotropic oxidative growth of goethite-coated sand particles in column reactors during 4-chloronitrobenzene reduction by Fe(ii)/goethite

Anisotropic oxidative growth of goethite-coated sand particles in column reactors during 4-chloronitrobenzene reduction by Fe(ii)/goethite

Remediation of Perfluorooctylsulfonate Contamination by in Situ Sequestration: Direct Monitoring of PFOS Binding to Polyquaternium Polymers

Indirect Potentiometric Determination of Polyquaternium Polymer Concentrations by Equilibrium Binding to 1-Dodecyl Sulfate

Contact Info

Product

Resources

About