原位生长孤立铁4A-Fe/聚醚砜复合膜的制备及其类Fenton降解苯酚性能  

The preparation and Fenton degradation performance of in-situ grown isolated iron 4A-Fe/PES composite membrane

作　　者：吕婧 张涵 叶卉[1,2] 孙金鹏 辛清萍 赵莉芝[1,2] 林立刚[1,2] 丁晓莉[1,2] 张玉忠[1,2] 李泓[1,2] LU Jing;ZHANG Han;YE Hui;SUN Jin-peng;XIN Qing-ping;ZHAO Li-zhi;LIN Li-gang;DING Xiao-li;ZHANG Yu-zhong;LI Hong(State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China;School of Material Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学分离膜与膜过程国家重点实验室,天津300387 [2]天津工业大学材料科学与工程学院,天津300387

出　　处：《中国环境科学》2024年第12期6698-6707,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(21978217)。

摘　　要：将膜分离与Fenton氧化技术结合,旨在实现有机废水的高效降解和催化剂的连续再利用.采用非溶剂致相分离法制备4A沸石/PES混合基质膜,通过浸渍法在4A沸石表面原位生长孤立铁物种,制备了4A-Fe/PES复合膜.利用SEM、FTIR、XPS等手段对膜形貌和结构进行详细表征.探究该膜在静态和动态条件下对苯酚的降解性能,并比较4A-Fe催化剂在粉末和膜形态下对H_(2)O_(2)分解的影响.结果表明,孤立铁的原位生长使沸石表面粗糙.动态条件下的降解效率显著高于静态,在pH值为2、H_(2)O_(2)添加量为31.6mmol/L、苯酚浓度为200mg/L条件下,仅1min内降解率可达96.1%.催化动力学显示,在pH值为2时,膜态降解速率是粉末态的56倍.经过5次循环,该膜对苯酚的降解率仍保持在90%以上.The integration of separation with Fenton oxidation aims to achieve efficient degradation of organic wastewater and continuous reuse of catalysts.In this study,4A zeolite/PES mixed matrix membranes were prepared via non-solvent-induced phase separation and 4A-Fe/PES composite membranes were prepared by in situ growth of isolated iron species on the surface of 4A zeolite through an impregnation technique.Detailed characterization of membrane morphology and structure was conducted using SEM,FTIR,and XPS.The phenol degradation performance of this membrane was investigated under both static and dynamic conditions,with a comparative analysis of the H_(2)O_(2) decomposition efficiency between 4A-Fe catalysts in powder and membrane forms.The results indicated that in situ growth of isolated iron species increased surface roughness on the zeolite.Under dynamic conditions,the degradation efficiency was significantly higher than in static conditions,reaching a 96.1% degradation rate within 1minute at pH 2,with 31.6mM H_(2)O_(2) and an initial phenol concentration of 200mg/L.Catalytic kinetics revealed that,at pH 2,the degradation rate of the membrane form was 56times that of the powder form.Even After 5cycles,the membrane maintained a phenol degradation rate exceeding 90%.

关 键 词：孤立铁 催化膜 沸石 FENTON 苯酚 

分 类 号：X703.5[环境科学与工程—环境工程]