摘要
以聚四氟乙烯(PTFE)中空纤维膜为载体,通过亲水和胺化修饰,原位生长钴铁普鲁士蓝类似物,经低温煅烧(300℃)得到钴铁双金属负载的PTFE中空纤维催化膜.利用扫描电镜(SEM)、显微红外光谱仪(FTIR)和接触角测量仪(CA)等手段对膜的物化特性进行表征,还研究了其催化降解性能和长效稳定性.在连续24 h错流过滤下,催化活化过硫酸盐(PMS)产生以单线态氧(^(1)O_(2))为主的多种活性氧(ROS),实现了对罗丹明B(RhB)的瞬时去除,去除率达99%以上,分别研究了pH、PMS用量以及阴离子种类和浓度对催化性能的影响.结果表明,钴铁双金属负载的PTFE中空纤维催化膜可有效实现高含盐废水中有机污染物的降解,并具有较好的运行稳定性,有望用于实际的工业废水的深度处理.
In this study,polytetrafluoroethylene(PTFE)hollow fiber membranes were used as carriers to grow cobalt-iron Prussian blue analogs in situ by hydrophilic and amination modifications,following with calcination at low temperature(300℃)to obtain cobalt-iron bimetallic loaded PTFE hollow fiber catalytic membranes.The physical and chemical properties of the membranes were characterized by scanning electron microscopy(SEM),Micro-Fourier transform infrared(Micro-FTIR)spectrometer and contact angle(CA)measurement,and the membranes catalytic degradation performance and long-term stability were also investigated.Under cross-flow filtration for 24 h,the catalytic activation of peroxymonosulfate(PMS)produced ^(1)O_(2) dominated reactive oxygen species(ROSs),achieving instantaneous removal of Rhodamine B(RhB)(>99%).The effects of pH,PMS dosage,and anion species and concentration on the catalytic performance were investigated separately.The results showed that the cobalt-iron bimetallic loaded PTFE hollow fiber catalytic membrane could effectively achieve the degradation of organic pollutants in the high-salinity wastewater with good operational stability.It is expected to be used in the actual advanced treatment of industrial wastewater.
作者
郑礼芃
林海波
王晓
刘富
ZHENG Lipeng;LIN Haibo;WANG Xiao;LIU Fu(Institute of Material Science and Chemical Engineering,Ningbo University,Ningbo 315211,China;Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Chemical Engineering,Qinghai University,Xining 810016,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2023年第2期24-34,共11页
Membrane Science and Technology
基金
中科院国际伙伴计划-全球共性挑战专项(181GJHZ2022038GC)
浙江省重点研发计划(2021C03170)。
