Fabrication of Polyethyleneimine-Functionalized Chitosan Composite Microspheres for Efficient Removal of Diclofenac Sodium from Water: Behavior and Mechanism Study

被引：1
作者：
Wang, Hongyu [1 ]
Xie, Yi [1 ]
Xiao, Henglin [2 ]
Li, Lu [3 ]
Zhang, Shujia [3 ]
Wang, Bin [1 ]
Jiang, Can [1 ]
Hu, Xiaoling [1 ]
Zhou, Dao [1 ]
Nan, Dongyun [4 ]
机构：
[1] Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China
[2] Hubei Univ Technol, Key Lab Hlth Intelligent Percept & Ecol Restorat R, Minist Educ, Wuhan 430068, Peoples R China
[3] Cent & Southern China Municipal Engn Design & Res, Wuhan 430010, Peoples R China
[4] First Peoples Hosp Jiangxia Dist, Wuhan 430200, Peoples R China
来源：
WATER AIR AND SOIL POLLUTION | 2024年 / 235卷 / 04期
关键词：
Chitosan; Polyethyleneimine; Adsorption; Diclofenac sodium; ANTIINFLAMMATORY DRUG DICLOFENAC; PERSONAL CARE PRODUCTS; FACILE SYNTHESIS; ADSORPTION; PHARMACEUTICALS; CELLULOSE; NANOPARTICLES; ADSORBENTS; PARTICLES; LANGMUIR;
D O I：
10.1007/s11270-024-07063-y
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Ecotoxicity of diclofenac sodium (DS) even at low concentrations makes it urgent to remove DS from water. In this work, chitosan microspheres were prepared by one-step reversed-phase emulsion method, and then, polyethyleneimine (PEI) was successfully grafted to form CS/PEI composites. The CS/PEI was characterized by Fourier infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Effects of different influencing factors like material composition, dosage, pH, co-existing anions, and humic acid were investigated, and adsorption behavior of CS/PEI was explored by model simulation analysis. Results showed that adsorption process fits well with pseudo-second-order kinetic model and Langmuir adsorption isotherm model, indicating homogeneous and monolayer adsorption nature, and maximum Langmuir adsorption capacity was 364.12 mg/g at pH 6. The reusability of CS/PEI was confirmed by cyclic adsorption-desorption experiments, and electrostatic attraction and hydrogen bonding were the main mechanism for DS uptake by CS/PEI. Therefore, CS/PEI microspheres can be regarded as an efficient and convenient adsorbent for DS removal from aqueous media.
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页数：16
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