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- W3190204890 abstract "Membranes remove contaminants from drinking water but require routine cleaning with harsh chemicals that are less conveniently accessed, handled, and disposed of in remote communities. This work demonstrates a nonchemical solar cleaning alternative using simulated sunlight that has been conveniently directed through a light-transmitting porous glass substrate to a thin TiO2 photocatalytic membrane coating. Dead-end filtration of nonpotable water with routine chemical-free backwashing showed the solar cleaning provided a 4.5-fold extension to the time needed before a chemical clean, as well as a 50% reduction in filtration pump electricity demand. These improvements were attributed to formation of hydroxyl radicals and subsequent oxidation of organic foulants, as well as the well-known photocatalytic superhydrophilic surface stimulation of TiO2 surfaces. Both effects acted together to reduce irreversible surface attachment of organic foulants. Size exclusion chromatography (SEC) indicated the effect only targeted the organic molecule–membrane surface interaction as little change was observed in the bulk organics profiles. Substrate light transmission onto photocatalytic membrane surfaces demonstrated in this work could be successfully applied as a membrane cleaning method during water treatment in remote communities. Future explorations can be made into potential for enhanced disinfection and antifouling functions on wider ranges of organic contaminated water supplies." @default.
- W3190204890 created "2021-08-16" @default.
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- W3190204890 date "2021-08-10" @default.
- W3190204890 modified "2023-10-01" @default.
- W3190204890 title "Sunlight-Transmitting Photocatalytic Membrane for Reduced Maintenance Water Treatment" @default.
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- W3190204890 doi "https://doi.org/10.1021/acsestwater.1c00073" @default.
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