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An innovative strategy for polyester microplastic fiber elimination from laundry wastewater via coupled separation and degradation using TiO2-based photocatalytic membrane reactor
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Degradation of microplastic fibers in laundry wastewater via immobilized silver-titanium dioxide based photocatalytic membrane reactor / Biao Wang
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Researchers developed an immobilised silver-titanium dioxide photocatalytic membrane reactor (PMR) to remove and degrade polyester microplastic fibers (PMPF) from laundry wastewater, coating Ag-TiO2 catalyst onto Al2O3 ceramic membranes. The system achieved up to 99.9% rejection of both simulated and real PMPF and a 23.2% degradation rate after 48 hours of UVC irradiation, with FESEM and FTIR/GC-MS analysis confirming significant polyester fiber degradation.
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Researchers evaluated a hybrid system combining TiO2 photocatalysis with membrane filtration for degrading microplastics in wastewater. The photocatalytic membrane reactor demonstrated effective removal and degradation of polyethylene, polypropylene, and PET microplastics, suggesting that integrated photocatalytic-membrane systems could improve microplastic removal beyond what conventional wastewater treatment achieves.
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Researchers reviewed emerging catalytic technologies for removing microplastics from water bodies, documenting the scale of aquatic microplastic contamination and evaluating which treatment approaches show the most promise for protecting drinking water and aquatic ecosystems from these virtually indestructible pollutants.
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"Researchers synthesized a polyester fiber modified with a g-C3N4/TiO2 photocatalyst that can self-degrade under solar illumination, achieving near-complete breakdown into CO2 and water after 400 hours of light exposure. Designing plastics that decompose under sunlight rather than fragmenting into persistent microplastics offers a proactive materials-level strategy to reduce the volume of synthetic polymer pollution entering ecosystems."
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