Adsorptive Treatment Dimetal-contaminated Liquid Wastes by Using Iron Nanoparticles and It’s Appliation on Ferrite Synthesis

• Main Authors: Tzu-Ting Chien, 簡子婷
• Other Authors: Kuen-SongLin
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/72316820288003143445

碩士 === 元智大學 === 化學工程與材料科學學系 === 100 === In recent years, waste pollution by heavy metals is a very serious problem in Taiwan. The contaminants are known to be toxic and carcinogenic, produced by industries such as electroplating, spinning, and dyeing industries. A lot of solid waste generated from steelworks and electrons arc furnace (EAF). The wastes are mainly composed of heavy metals. The disposal of the waste without proper treatment has posed an environmental problem. Therefore, the main objectives of the present study were investigation the absorptive treatment of dimetal-contaminated liquid wastes (DMCLWs) using ZVINs and synthesis and characterization of ferrite from the products of treatments. Experimentally, it has found that the ZVINs have high uptake capacity to remove some metal cations such as Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ) form wastewaters. From the ICP-OES experiments the optimum absorptive treatment obtained at pH=6. Ferrite were produced in presence of different kinds of additives such as ZnO , NiO and flyash. utilizing ball milling and then calcined in different temperatures. From FE-SEM analyses, the ferrite particle has a diameter around 100 nm. The Ni-ferrite at 2θ= 30.2°, 35.56°, 43.16°, 62.92°, and the Zn-ferrite at 2θ= 35.28°, 42.92°, and 56.64°, respectively analyzed by XRD. From XPS spectra, calcination greatly affects the number of metal on the surface of ferrite. The optimum temperature for calcinations found to be 800℃. Furthermore, zinc ferrite was synthetized using both flyash and zinc oxide. Results show that the size of ferrite particles increase from 70 nm to 120 nm when the temperature rises to 800℃ while the particle shape changes from ball to cube. Moveover, XANES spectra and EXAFS data also showed that after adsorption of DMCLWs using ZVINs and synthesis of ferrite respectively. The first shell is made of Zn-O bonding with bond distances of 2.06, and 2.00 Å, and coordination numbers both are 3.79 respectively.