Electrochemical impedance spectroscopy study of membrane fouling and electrochemical regeneration at a sub-stoichiometric TiO2 reactive electrochemical membrane
By Jing, Yin; Guo, Lun; Chaplin, Brian P.
Published in Journal of Membrane Science
NULL
2016
Abstract
Abstract In this study, a novel sub-stoichiometric TiO2 ultrafiltration reactive electrochemical membrane (REM) was synthesized and used for electrochemical regeneration of membranes fouled by humic acid (HA) and polystyrene beads (PS). A non-invasive and non-destructive electrochemical impedance spectroscopy (EIS) characterization technique was used to spatially characterize fouling at the {REM} and data were successfully interpreted by a transmission line model. Based on these analyses, a chemical free electrochemical regeneration (CFER) scheme in backwash mode was developed. The {CFER} in anodic treatment mode recovered the flux of a {HA} fouled {REM} from 3.0% to between 76% and 99% of the initial flux over 5 continuous fouling/regeneration cycles. Full flux recovery of a {PS} fouled {REM} (fouling 31% to 38%) was achieved when using either cathodic or anodic CFER. By contrast, regeneration without an applied potential showed only partial flux recovery of 66% and 62% on {HA} fouled and {PS} fouled membranes, respectively. The operating cost of {CFER} was $0.04 m?2 to $0.06 m?2 per regeneration cycle, which is only 1.3% the cost of NaOH cleaning. Results suggest that the {REM} can provide an efficient and cost effective regeneration scheme that allows it to function in a diverse set of water treatment applications.
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.