title: Synthesis of magnetic epichlorohydrin cross-linked carboxymethyl cellulose microspheres and their adsorption behavior for methylene blue.
abstract: Epichlorohydrin cross-linked carboxymethyl cellulose microspheres (ECH/CMC) obtained by inverse suspension method and magnetic Fe3O4nanoparticles encasing the ECH/CMC microspheres (M-ECH/CMC) obtained by two different methods were successfully prepared and compared. Their structures and morphologies were analyzed using polarizing microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. The adsorption behaviors of M1-ECH/CMC for methylene blue (MB) in the single cationic dye wastewater, the cationic/anionic dye mixture in the absence or presence of co-existed additives (salt and surfactant) wastewater, were also investigated with UV-vis spectrometer. The results showed that the magnetic Fe3O4nanoparticles were loaded readily in situ into ECH/CMC by specific, chemical interactions between COO-groups of ECH/CMC and magnetic responsive Fe3O4. The Langmuir isotherm and pseudo-second-order kinetic model provide best correlation with the experimental data for the adsorption of MB onto ECH/CMC and M1-ECH/CMC microspheres, while the Langmuir isotherm and pseudo-first-order kinetic model for M2-ECH/CMC. These microspheres are easily recyclable and exhibit high desorption and adsorption, which suggests that they can be applied as potential environmental adsorbents.
authors: a Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an , Shaanxi , China.
authors: Qingwen
authors: Q
authors: Lin
authors: a Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an , Shaanxi , China.
authors: Jiali
authors: J
authors: Chang
authors: a Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an , Shaanxi , China.
authors: Mengfan
authors: M
authors: Gao
authors: a Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an , Shaanxi , China.
authors: Hongzhu
authors: H
authors: Ma
mesh_terms: D000327:Adsorption; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry*; D004811:Epichlorohydrin / Q000737:chemistry*; D006801:Humans; D008751:Methylene Blue / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D017550:Spectroscopy, Fourier Transform Infrared; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D002266:Carboxymethylcellulose Sodium; D003432:Cross-Linking Reagents; D004811:Epichlorohydrin; D008751:Methylene Blue; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Adsorption; carboxymethyl cellulose; epichlorohydrin; magnetic microsphere; methylene blue; recyclable