PET微塑料水解再造缺陷铁基金属有机框架及其应用研究  

Upcycling PET microplastics via alkaline hydrolysis to defective iron metal-organic frameworks for water treatment

作　　者：蒋文斌 姜晨晨 韦选香 徐李聪 王姗丽 Hasan MD Shahib 吴明华[1,2] 余德游 JIANG Wen-bin;JIANG Chen-chen;WEI Xuan-xiang;XU Li-cong;WANG Shan-li;HASAN Md-Shahib;WU Ming-hua;YU De-you(MOE Engineering Research Center of Ecological Dyeing and Finishing Technology,College of Textile Science&Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Sci-Tech University Tongxiang Research Institute,Tongxiang 314500,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),浙江理工大学生态染整技术教育部工程研究中心,浙江杭州310018 [2]浙江理工大学桐乡研究院有限公司,浙江桐乡314500

出　　处：《中国环境科学》2024年第9期5222-5233,共12页China Environmental Science

基　　金：国家自然科学基金资助项目(22106141);中国博士后科学基金资助项目(2022M712827);浙江理工大学基本科研业务费专项资金资助(23202131-Y)。

摘　　要：为了有效去除聚对苯二甲酸乙二酯(PET)微塑料,采用碱性水解方法将PET微塑料升级再造,制备缺陷铁基金属有机框架(Fe-MOFs)催化剂,用于催化臭氧深度处理模拟印染废水.结果表明,在Na OH浓度为2mol/L、水解温度120℃、水解时间120min的条件下,PET微塑料去除率达100%,对苯二甲酸钠盐(Na_(2)TPA)产率达97.4%;以PET微塑料水解产物为前驱体,发展了2种简易方法制备缺陷型Fe-MOFs催化剂.通过扫描电子显微镜(SEM)、X射线粉末衍射仪(PXRD)、傅里叶红外光谱仪(FT-IR)及X射线光电子能谱仪(XPS)等对缺陷Fe-MOFs催化剂的形貌特征、晶体结构、分子结构以及元素种类进行表征,证明催化剂具有缺陷结构.研究评估了2种催化剂催化臭氧降解AO-7性能,其中D-Fe-MOF催化剂可在3min内完全降解AO-7,反应速率常数达0.926min^(-1),是W-Fe-MOF催化剂和单独臭氧的3.6倍和7.3倍.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 (Na_(2)TPA) 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.

关 键 词：PET微塑料 碱性水解 升级再造 缺陷金属有机框架 催化臭氧 

分 类 号：X703.1[环境科学与工程—环境工程]