NZ750478A - Methods and systems for electrochemical oxidation of polyfluoroalkyl and perfluroalkyl contaminants - Google Patents

Methods and systems for electrochemical oxidation of polyfluoroalkyl and perfluroalkyl contaminants

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Publication number
NZ750478A
NZ750478A NZ750478A NZ75047817A NZ750478A NZ 750478 A NZ750478 A NZ 750478A NZ 750478 A NZ750478 A NZ 750478A NZ 75047817 A NZ75047817 A NZ 75047817A NZ 750478 A NZ750478 A NZ 750478A
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NZ
New Zealand
Prior art keywords
titanium oxide
phase titanium
pfass
magnéli phase
oxide material
Prior art date
Application number
NZ750478A
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NZ750478B2 (en
Inventor
Qingguo Huang
Hui Lin
Junfeng Niu
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Univ Georgia
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Publication date
Application filed by Univ Georgia filed Critical Univ Georgia
Publication of NZ750478A publication Critical patent/NZ750478A/en
Publication of NZ750478B2 publication Critical patent/NZ750478B2/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F1/46114—Electrodes in particulate form or with conductive and/or non conductive particles between them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
    • C25B11/031—Porous electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B3/00—Electrolytic production of organic compounds
    • C25B3/20—Processes
    • C25B3/23—Oxidation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0433—Molding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/664—Ceramic materials
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46133—Electrodes characterised by the material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46133—Electrodes characterised by the material
    • C02F2001/46138—Electrodes comprising a substrate and a coating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46152—Electrodes characterised by the shape or form
    • C02F2001/46157—Perforated or foraminous electrodes
    • C02F2001/46161—Porous electrodes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46152—Electrodes characterised by the shape or form
    • C02F2001/46171—Cylindrical or tubular shaped
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • C02F2101/14—Fluorine or fluorine-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/36—Organic compounds containing halogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001—Runoff or storm water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/346—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from semiconductor processing, e.g. waste water from polishing of wafers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/46115—Electrolytic cell with membranes or diaphragms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The present disclosure provides methods, electrodes, and systems for electrochemical oxidation of polyfluoroalkyl and perfluroalkyl (PFAS) contaminants using Magnéli phase titanium suboxide ceramic electrodes/membranes. Magneli phase titanium suboxide ceramic electrodes/membranes can be porous and can be included in reactive electrochemical membrane filtration systems for filtration, concentration, and oxidation of PFASs and other contaminants.

Claims (5)

Claims:
1. A method for ochemically oxidizing polyfluoroalkyl and oroalkyl substances (PFASs), the method comprising: contacting an aqueous composition contaminated with one or more PFASs with a ceramic electrode comprising a Magnéli phase titanium oxide material; and supplying ic t to the ceramic electrode in an electrochemical cell, whereby the Magnéli phase titanium oxide material of the ceramic electrode contacts the aqueous composition and electrochemically oxidizes the PFASs to oxidatively degrade the PFASs into mineral components, inorganic components, or both, wherein the Magnéli phase titanium oxide material comprises Ti4O7, Ti5O9, or a combination thereof, wherein the porous Magnéli phase um oxide material comprises a plurality of micropores having a diameter from about 10 nm to 10 µm, and wherein the porous Magnéli phase titanium oxide al has a porosity of about 5-75%.
2. The method of claim 1, wherein the composition contaminated with PFASs ses wastewater.
3. The method of claim 2, wherein the wastewater is pre-treated to concentrate the PFASs prior to contact with the Magnéli phase um oxide ceramic electrode.
4. The method of claim 3, wherein the wastewater is pre-treated via electrocoagulation to concentrate the PFSAs. 5. The method of claim 1, wherein the Magnéli phase titanium oxide material is porous. 6. The method of claim 1, wherein the micropores have an average pore diameter of about 0.1 µm to 5 µm. 7. The method of claim 5, wherein the porous Magnéli phase titanium oxide material comprises a plurality of ores and wherein at least a portion of the pores are interconnected. 8. The method of claim 1, wherein the PFASs se perfluoroalkyl acids (PFAAs). 9. The method of claim 8, wherein the PFAAs comprise perfluorooctanoate (PFOA), perfluorooctanesulfonate (PFOS), or both. 10. The method of claim 1, n the Magnéli phase um oxide material consists essentially of Ti4O7. 11. A porous Magnéli phase um oxide ceramic electrode comprising: a Magnéli phase titanium oxide material comprising Ti4O7, Ti5O9, or a combination thereof, and having a plurality of micropores in the material, the pores having an average diameter of about 1 µm to 5 µm, wherein the material has a porosity of about 5-75%, and wherein the Magnéli phase titanium oxide material is in t with the s composition contaminated with one or more PFASs when the electrode is inserted in the aqueous composition. 12. A system for electrochemical oxidation of polyfluoroalkyl and perfluoroalkyl substances (PFASs), the system comprising: a reservoir for containing an aqueous composition contaminated with PFASs; a first ceramic electrode sing a Magnéli phase titanium oxide material comprising Ti4O7, Ti5O9, or a combination thereof, the Magnéli phase titanium oxide material is configured to be in contact with the aqueous composition in the reservoir, wherein the electrode oxidatively degrades the PFASs to mineral components, inorganic components, or both, wherein the Magnéli phase titanium oxide material comprises Ti4O7, Ti5O9, or a ation thereof, wherein the porous Magnéli phase um oxide al comprises a plurality of micropores having a diameter from about 10 nm to 10 µm, and wherein the porous Magnéli phase titanium oxide al has a porosity of about 5-75%. 13. The system of claim 12, further comprising a pump for moving the aqueous composition through the system. 14. The system of claim 12, n the first ceramic electrode is the working electrode in an electrochemical cell, wherein the system further comprises a counter electrode. 15. The system of claim 12, further comprising a second ceramic electrode comprising Ti4O7, Ti5O9, or a combination thereof, wherein one of the first or second electrodes is the anode and the other is the cathode. 16. The system of claim 12, wherein the Magnéli phase titanium oxide material comprises a plurality of micropores,. 17. The system of claim 16, wherein the first ceramic electrode is both a working electrode and a filter through which the aqueous composition passes, and wherein the system further comprises a pump for moving the aqueous composition from the reservoir h the filter of the first ceramic electrode , wherein the filter oxidatively degrades the PFASs to mineral components, inorganic components, or both as the s composition passes through the filter. 18. The system of claim 17, further comprising a cathode, wherein the cathode comprises a Magnéli phase titanium oxide material comprising Ti4O7, Ti5O9, or a combination thereof and comprises a plurality of micropores, and wherein the porous Magnéli phase titanium oxide material also is a filter through which the aqueous composition passes. 19. The system of claim 13, wherein the aqueous composition contaminated with PFASs comprises wastewater. 20. The system of claim 12, wherein the PFASs comprise perfluoroalkyl acids (PFAAs). 21. The system of claim 20, wherein the PFAAs comprise perfluorooctanoate (PFOA), orooctanesulfonate (PFOS), or both. 22. The system of claim 12, wherein the Magnéli phase titanium oxide material consists ially of Ti4O7. 23. A method for ochemically oxidizing uoroalkyl and oroalkyl substances (PFASs) and trichloroethylene (TCE) in an aqueous composition, the method comprising: contacting an aqueous ition inated with one or more types of PFASs and TCE with at least two porous Magnéli phase titanium oxide ceramic membrane electrodes having at least a portion of the membrane coated with activated carbon fiber (ACF); and supplying electric t to one of the Magnéli phase titanium oxide ceramic membrane electrodes in an electrochemical cell, such that one electrode serves as the anode and electrochemically oxidizes the PFASs to oxidatively degrade the PFASs into mineral and/or inorganic components and wherein the other electrode serves as the cathode and s chlorate to Clwherein the Magnéli phase titanium oxide material ses Ti4O7, Ti5O9, or a combination thereof, wherein the porous Magnéli phase um oxide al comprises a plurality of ores having a diameter from about 10 nm to 10 µm, and n the porous Magnéli phase titanium oxide material has a porosity of about 5-75%. 24. The method of claim 23, wherein the electrodes are in a reactive electrochemical membrane (REM) system. 25. The method of claim 23, wherein the contaminated aqueous composition is filtered past the electrode membranes. 26. The method of claim 23, wherein the at least two porous Magnéli phase titanium oxide ceramic membrane electrodes have a tubular shape. 27. The method of claim 1, wherein the ceramic electrode ts of the Magnéli phase titanium oxide material. 28. The electrode of claim 11, wherein the ceramic electrode consists of the Magnéli phase titanium oxide material. 29. The system of claim 13, wherein the ceramic electrode consists of the Magnéli phase titanium oxide material. \.3 «w “mu “M.0RM ”EDD. $.61 0Q. 1..~‘..\..~.\\\\\\\\\\\\\\\\\\\k\‘033$nun."uuuuuuuuunnnunnn.uuuu¢\t G \\\\\\\\\\\\\\\§u.uvvvvvvvvvvvvvvvvvvvvvvvuwuuuuuuuuuxxxmtxxxtttttxxxxxxxxxxx§§.§ 7.02 .. .65 .iS?uuuuuuw. §\\buuuunxl 6.
5. {Sigi‘xxxtthhh?u“R““Rvuuhvituuuumhux. ..................... {xx ......... 4.:ka?“ua“““§““nuuuun...i .~tai§i-3vvvvvvuuuuvuuuuuuuu““““uRRRRnunnuanh..l 7.. 3mi\\\\h\.\h¢n?u\x
NZ750478A 2017-08-18 Methods and systems for electrochemical oxidation of polyfluoroalkyl and perfluroalkyl contaminants NZ750478B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662377120P 2016-08-19 2016-08-19
PCT/US2017/047641 WO2018035474A1 (en) 2016-08-19 2017-08-18 Methods and systems for electrochemical oxidation of polyfluoroalkyl and perfluroalkyl contaminants

Publications (2)

Publication Number Publication Date
NZ750478A true NZ750478A (en) 2025-06-27
NZ750478B2 NZ750478B2 (en) 2025-09-30

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US20230322589A1 (en) 2023-10-12
EP3500528A1 (en) 2019-06-26
US11512011B2 (en) 2022-11-29
AU2023203869B2 (en) 2025-09-25
US20190185351A1 (en) 2019-06-20
WO2018035474A1 (en) 2018-02-22
AU2017313906A1 (en) 2019-03-07
AU2017313906B2 (en) 2023-03-23
CA3033532A1 (en) 2018-02-22
EP3500528A4 (en) 2020-06-03
AU2023203869A1 (en) 2023-07-27

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