Recyclable hydrolyzed polymers of intrinsic microporosity-1/Fe_(3)O_(4) magnetic composites as adsorbents for selective cationic dye adsorption  

作　　者：Feng Zhang Shuainan Xu Xiumei Geng Meixia Shan Yatao Zhang 

机构地区：[1]School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Frontiers of Chemical Science and Engineering》2024年第2期113-125,共13页化学科学与工程前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.22178327 and 52003250);China Postdoctoral Science Foundation(Grant No.2020M682351);Excellent Youth Foundation of Henan Scientific Committee(Grant No.222300420018);Key Scientific Research Project of Universities in Henan Province(Grant No.21zx006).

摘　　要：Polymers of intrinsic microporosity shows great potential for dye adsorption and magnetic Fe_(3)O_(4) are easy to be separated.In this work,hydrolyzed polymers of intrinsic microporosity-1/Fe_(3)O_(4) composite adsorbents were prepared by phase inversion and hydrolysis process for cationic dye adsorption.The chemical structure and morphology of the composite adsorbents were systematically characterized by several characterization methods.Using methylene blue as the target dye,the influences of solution pH,contact time,initial dye concentration,and system temperature on the methylene blue adsorption process were investigated.The incorporation of Fe_(3)O_(4) particle into hydrolyzed polymers of intrinsic microporosity-1 endow the adsorbent with high magnetic saturation(20.7 emu·g^(–1))which allows the rapid separation of the adsorbent.Furthermore,the adsorption process was simulated by adsorption kinetics,isotherms and thermodynamics to gain insight onto the intrinsic adsorption mechanism.In addition,the composite adsorbents are able to selectively adsorb cationic dyes from mixed dyes solution.Hydrolyzed polymers of intrinsic microporosity/Fe_(3)O_(4) shows only a slight decrease for methylene blue adsorption after 10 adsorption/regeneration cycles,demonstrating the outstanding regeneration performance.The high adsorption capacity,outstanding regeneration ability,together with simple preparation method,endow the composite adsorbents great potential for selective removal of cationic dyes in wastewater system.

关 键 词：polymers of intrinsic microporosity magnetic adsorbent cationic dye adsorption 

分 类 号：O64[理学—物理化学]