公开(公告)号：US20230130585A1

公开(公告)日：2023-04-27

申请号：US17914156

申请日：2021-03-23

Applicant: Evoqua Water Technologies LLC

Inventor： SIMON P. DUKES ,  GEORGE GU ,  SAVVAS HADJIKYRIACOU ,  YANG CHEN

IPC: C02F1/469 ,  C02F1/42 ,  B01D69/02

Abstract: Methods of treating a waste stream containing perfluoroalkyl substances (PFAS) are disclosed. The methods include directing the waste stream to a dilution compartment of an electrochemical separation device, directing a treatment stream to a concentration compartment of the electrochemical separation device, and applying a voltage across the electrodes to produce a dilute stream substantially free of the PFAS and a concentrate stream. At least one of the waste stream and the treatment stream comprises a water miscible organic solvent. Methods of concentrating PFAS from a wastewater are also disclosed. PFAS concentration systems are also disclosed. The systems include a column comprising an ion exchange resin and an electrochemical separation device having a dilution compartment fluidly connected to an outlet of the column. Methods of facilitating treatment of a waste stream containing PFAS are also disclosed.

公开(公告)号：US20220062829A1

公开(公告)日：2022-03-03

申请号：US17281239

申请日：2019-09-25

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： George Gu ,  SAVVAS HADJIKYRIACOU ,  Simon P. DUKES ,  Michael J. SHAW

IPC: B01D69/02 ,  B01D61/44 ,  B01D69/10 ,  B01D69/12 ,  C02F1/469

Abstract: A monovalent selective ion exchange membrane is disclosed. The membrane includes a polymeric microporous substrate, a cross-linked ion-transferring polymeric layer on a surface of the substrate, and a charged functionalizing layer covalently bound to the ion-transferring layer by an acrylic group. A method of producing a monovalent selective cation exchange membrane is also disclosed. The method may include chemically adsorbing an acrylic intermediate layer comprising a chlorosulfonated methacrylate group to a cross-linked ion-transferring polymeric layer on a surface of a polymeric microporous substrate, aminating the chlorosulfonated methacrylate group to attach an amine group layer, and functionalizing the amine group layer with a charged compound layer to produce the cation exchange membrane. Water treatment systems including the monovalent selective cation exchange membrane and methods of facilitating water treatment including providing the monovalent selective cation exchange membrane are also disclosed.