The Preparation and Application of Magnetic Catalyst to Ozonation Process

• Main Authors: Chia-Ling Chiang, 江佳玲
• Other Authors: Cheng-Nan Chang
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/47280533730328757168

碩士 === 東海大學 === 環境科學與工程學系 === 95 === This study the magnetic perfluorooctylalumina (MPFOA) is used to enhance the efficiency of ozonation on the treatment of the eutrophic raw water of Te-Chi Reservoir. The investigation includes the preparation of the magnetic catalyst, miasmic study on the ozonation of the raw water and the variation of functional groups upon the ozonation. The water samples were collected from Te-Chi Reservoir which provides major domestic water supply in metropolitan central of the Taiwan area. The organic contents of water samples were extracted and classified into humic acids (HAs, 29.5 %), fulvic acids (FAs, 19.5 %), hydrophobic neutrals (37.9 %), hydrophobic bases (2.9 %) and hydrophilic fractions (10.2 %) by using of XAD-8 resins. The characteristics of MPFOA can be identified by the scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS), Superconducting quantum interference device (SQUID), X-ray powder diffraction (XRD) and Fourier-transform infrared spectrophotometer (FTIR). MPFOA has the more ability to adsorb ozone and organic matters, and furthermore to increase the ozone dissolving rate and stability. Therefore, the ozonation with MPFOA can raise the decomposition efficiency of toward to organic matters. During ozonation process, the ORP, DO3, and pH values were monitored and connected to an on-line oscilloscope to investigate the ozonation mechanisms. The data also used to establish the Nernst equation and simulate the possible ozonation mechanisms the presence of catalyst. The profile of functional groups during the ozonation was examined by both FTIR and 13C NMR spectra. The variation of functional groups can represent the destruction by ozonation and ozonation with MPFOA in this study.