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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.
Pencemaran mikroplastik (MP), terutamanya daripada gentian mikroplastik polyester (PMPF) yang dikeluarkan semasa proses dobi, telah menjadi isu alam sekitar yang ketara. Kajian ini meneroka penyelesaian yang berkesan untuk menolak dan merendahkan kedua-dua simulasi dan PMPF sebenar dalam air sisa dobi menggunakan reactor membran fotomangkin (PMR) berasaskan TiO2. PMR tidak bergerak menyepadukan mangkin TiO2 (Ag-TiO2) yang dihias Ag pada membran seramik Al2O3, menggabungkan keupayaan fotokatalitik TiO2 dengan kecekapan dipertingkat yang disediakan oleh Kesan plasmonik nanopartikel perak. Persediaan ini bertujuan untuk mengoptimumkan degradasi PMPF di bawah penyinaran cahaya ultraviolet-C (UVC). Prestasi PMR tidak bergerak telah dinilai dengan simulasi dan air sisa dobi sebenar yang mengandungi PMPF. Keputusan menunjukkan bahawa membran pemangkin Ag-TiO2 mencapai penolakan sehingga 99.9% bagi kedua-dua simulasi dan PMPF sebenar, dan kadar degradasi 23.2% bagi PMPF simulasi selepas 48 jam penyinaran UVC. Analisis morfologi terperinci melalui FESEM dan pencirian kimia melalui FTIR dan GC/MS mengesahkan degradasi gentian poliester yang ketara. Kajian ini menunjukkan potensi PMR tak bergerak berasaskan TiO2 sebagai penyelesaian berskala dan cekap untuk mengurangkan pencemaran MP berserabut dalam air sisa. Pendekatan ini menggabungkan degradasi fotokatalitik dengan penapisan membran, menolak dan merendahkan ahli parlimen berserabut dengan berkesan, dengan itu mengurangkan kesan alam sekitar mereka.
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