Shujuan Xiao,Xiaowen Huo,Shuxin Fan,Kui Zhao,Shouwu Yu,Xiaoyao Tan
To enhance the performance of the polyphenylene sulfone (PPSU) membrane, a novel mixed matrix membrane with hydrophilicity and antifouling properties was prepared. Using PPSU as the basic membrane material, polyvinyl pyrrolidone (PVP) as the porogen, N -Methyl pyrrolidone (NMP) as the solvent, and MOF-CAU-1 (Al 4 (OH) 2 (OCH 3 ) 4 (H 2 N-BDC) 3 · x H 2 O) as the filler, PPSU/CAU-1 mixed matrix membrane (MMM) was prepared by an immersion precipitation and phase transformation technique. By changing the amount of MOF-CAU-1, the properties and performance of the MMM membrane were investigated in terms of hydrophilicity, pore morphology, surface roughness, and dye removal. The results show that the highest pure water flux of the mixed reached 47.9 L·m −2 ·h −1 , when the CAU-1 addition amount was 1.0 wt%, which was 23% higher than that of the pure PPSU membrane. Both the rejection rate and the antifouling performance of the MMM membrane also noticeably improved.
The widespread use and subsequent accumulation of florfenicol (FFC), a common antibiotic, through the food chain poses significant risks to aquatic ecosystems and human health, necessitating effective strategies for its removal from water bodies. To solve the challenge, herein, we developed a novel aluminum-based metal–organic framework CAU-1, engineered for the efficient adsorption of FFC. CAU-1 contains the plentiful –NH 2 and μ-OH groups with the positively charged on the surface. In the adsorption process, CAU-1 perform hydrogen bonding interactions with FFC’s functional groups (−F, –OH, −Cl, –NH–, and −SO 2 –). Furthermore, the positively charged surface of CAU-1 enhances FFC adsorption via electrostatic attraction together. FFC adsorption equilibrium on CAU-1 is attained within 180 min with a monolayer adsorption capacity of 386 mg/g at 303 K, surpassing most of the reported adsorbents. The exothermic FFC adsorption process on CAU-1 remains largely unaffected by coexisting ions. Additionally, CAU-1 can be efficiently regenerated using a mixed solution of 0.1 M HCl and ethanol–water as an eluent. This work highlights CAU-1’s potential as an effective adsorbent for FFC removal, emphasizing the importance of tuning or designing surface functional groups on adsorbents to boost their adsorption capabilities.
危险品化学品经营许可证（带存储）