Study on the Preparation and Adsorption of Magnetic Iron Manganese Oxide and Surface Modification with Chitosan

• Main Authors: Yeh,Chih-hsien, 葉致賢
• Other Authors: Chen, I-Pin
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/r5ydvj

碩士 === 嘉南藥理大學 === 環境工程與科學系 === 104 === In this study, manganese-ferrite was synthesized using combustion synthesis process using fixed ratio of ferric nitrate, manganese nitrate, and urea.Then use MnFe2O4 coated by Chitosan to produce a Chi@MnFe2O4 nanocomposites and used as adsorbents. Different ignition temperature and time were used in preparing the Manganese ferrite (MnFe2O4) to determine the optimum condition and were characterized by SEM, XRD and SQUID VSM. The SEM analysis revealed that the morphology and particle size of the adsorbent contains nanoparticles of uniform circular structure. The evidence for the phase purity and formation of MnFe2O4 particles were validated by X-ray diffraction. The ferromagnetic behavior of prepared MnFe2O4 at temperature 400 ˚C, 600 ˚C and 800 ˚C was examined using VSM analysis and showed a saturation magnetization of 16.3 emu/g. The synthesized MnFe2O4 and Chi@MnFe2O4 were used in removing copper from aqueous solution. The experiment showed that MnFe2O4 obeys Langmuir Isotherm and maximum adsorption capacity is 0.571mg/g.; Chi@MnFe2O4 nanocomposite follows Freundlich Isotherm. Chi@MnFe2O4 showed a higher adsorption capacity over MnFe2O4 with maximum adsorption capacity of 2.638 mg/L.