Preparation of Magnetic Fe3O4/Carbon Nanocomposites by Co-precipitation Method for Removal of Copper Ions from Aqueous Solution

• Main Authors: Zhi-Feng Yang, 楊志鋒
• Other Authors: Chien-Te Hsieh
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/09366709340664966772

碩士 === 元智大學 === 化學工程與材料科學學系 === 105 === With the rapid development of semiconductor manufacturing, the treatment of liquid waste in the production process cause increasingly the attention of the enterprises. In this reaserch, the magnetic Fe3O4/Carbon nanocomposites prepared by co-precipitation method was used as absorbent for the absorption of copper ions. The efficient separation of the absorbent and absorbate and the recycling of absorbent were realized by the magnetic propert. In this reaserch, XRD, XPS, FTIR, TEM and SEM were used to analyze the micromorphology and component of the pruducts. Using the isotherm models of Langmuir, Freundlich and Dubinin-Radushkevich were to analyze the adsorption equilibrium datas of diffrenet proportion of carbon and Fe3O4 in order to study mechanism of adsorption. The results of XRD and XPS indicate the high purity of products and the results of SEM and TEM indicate the size of Fe3O4 nanoparticles is approximately 20 nm with a highly dispersed. The theoretical maximum adsorbing capacity of CNT@Fe3O4 and GO@Fe3O4 for copper ions was calculated by Langmuir isothermal equation is between 9.32 and 9.48 mg g-1, 15.43 and 32.49 mg g-1 respectively, which indicate a slight adding of Fe3O4 can enhance adsorbing capacity of GO. The type of adsorption of them is belong to ino-exchange type and belong to endothermic process. In this study, the alkaline solution was succeedly used to desorb the Cu2+ from magnetic Fe3O4/Carbon nanocomposites, and it work best when pH is 11.