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Enhanced Sorption of Perfluoro-alkyl...

Aly, Yousof Hussein.

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Enhanced Sorption of Perfluoro-alkyl Substances (PFASs) onto Ottawa Sand.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Enhanced Sorption of Perfluoro-alkyl Substances (PFASs) onto Ottawa Sand./
Author:	Aly, Yousof Hussein.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	69 p.
Notes:	Source: Masters Abstracts International, Volume: 55-04.
Contained By:	Masters Abstracts International55-04(E).
Subject:	Environmental health. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10076336
ISBN:	9781339586373

Enhanced Sorption of Perfluoro-alkyl Substances (PFASs) onto Ottawa Sand.
Aly, Yousof Hussein.

Enhanced Sorption of Perfluoro-alkyl Substances (PFASs) onto Ottawa Sand. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 69 p.

Source: Masters Abstracts International, Volume: 55-04.

Thesis (M.S.)--University of Minnesota, 2016.

Sorption to mineral surfaces is an important process in controlling the fate, mobility, and bioavailability of perfluoroalkyl substances (PFASs) in aquatic systems. Unlike other persistent organic pollutants, PFASs are highly water-soluble due to their hydrophilic head group and thus their solid-phase partitioning is limited under natural conditions. However, recent research has shown that sorption of PFASs to suspended solids in surface water can be enhanced by addition of cationic coagulants, through a combination of electrostatic and hydrophobic effects. Whether coagulant-enhanced sorption can be adapted for in situ remediation of PFAS-contaminated groundwater remains an open question. We investigated sorption of six PFASs at environmentally relevant concentrations in the presence of four cationic coagulants: polyaluminum chloride, polyamine, polydiallyldimethyl ammonium chloride (polyDADMAC), and a tannin-based cationic polymer. PFAS adsorption isotherms were determined on Ottawa sand and on aquifer material from a known PFAS-contaminated site. Preliminary results suggest that this method shows promise for in situ remediation of PFAS-contaminated groundwater.

ISBN: 9781339586373Subjects--Topical Terms:

543032
Environmental health.

Enhanced Sorption of Perfluoro-alkyl Substances (PFASs) onto Ottawa Sand.
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520 $a Sorption to mineral surfaces is an important process in controlling the fate, mobility, and bioavailability of perfluoroalkyl substances (PFASs) in aquatic systems. Unlike other persistent organic pollutants, PFASs are highly water-soluble due to their hydrophilic head group and thus their solid-phase partitioning is limited under natural conditions. However, recent research has shown that sorption of PFASs to suspended solids in surface water can be enhanced by addition of cationic coagulants, through a combination of electrostatic and hydrophobic effects. Whether coagulant-enhanced sorption can be adapted for in situ remediation of PFAS-contaminated groundwater remains an open question. We investigated sorption of six PFASs at environmentally relevant concentrations in the presence of four cationic coagulants: polyaluminum chloride, polyamine, polydiallyldimethyl ammonium chloride (polyDADMAC), and a tannin-based cationic polymer. PFAS adsorption isotherms were determined on Ottawa sand and on aquifer material from a known PFAS-contaminated site. Preliminary results suggest that this method shows promise for in situ remediation of PFAS-contaminated groundwater.
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