Upcycling PET microplastics via alkaline hydrolysis to defective iron metal-organic frameworks for water treatment
In order to effectively remove polyetylene terephthalate(PET)microplastics,the PET microplastics were alkaline hydrolysed and upcycled to defective iron metal organic frameworks(Fe-MOFs)for the treatment of printing and finishing wastewater.The results showed that the removal rate of PET microplastics reached 100%with 97.4%yield of sodium terephthalate(Na2TPA)at the conditions of 2mol/L NaOH,120℃hydrolysis temperature of,and 120min reaction time..Two facile methods using PET microplastics hydrolysates as precursors were developed for the preparation of defective Fe-MOFs catalysts.Scanning electron microscopy(SEM),powder X-ray diffractometer(XRD),Fourier transform-infrared spectroscopy(FT-IR),and X-ray photoelectron spectroscopy(XPS)techniques were employed to characterize the morphologies,crystal structures,molecular structures,and elemental compositions of resultant catalysts.Finally,their catalytic ozonation performances was further evaluated and compared by the degradation of AO-7.The results revealed that D-Fe-MOF could completely remove AO-7 within 3 min at a degradation rate constant of 0.926 min-1,which was 3.6 and 7.3-fold times higher than those of W-Fe-MOF and ozonation alone process.
PET microplasticsalkaline hydrolysisupcyclingdefective metal-organic frameworkscatalytic ozonation
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维普
