| Summary: | 碩士 === 大同大學 === 化學工程研究所 === 88 === This research was focused on the adsorption behavior of nonvolatile organic compounds such as phenol and p-nitrophenol (PNP) onto granular activated carbon (GAC). From the batch experiment test results, the carbon has a higher capacity for PNP than phenol. The single-component and binary adsorption equilibria in the aqueous solutions at different temperatures were determined by batch experiments. And the breakthrough curves of adsorption column operations were experimentally determined. In order to predict the breakthrough time by the wave propagation theory, the research tried many single-component and binary adsorption isotherm models to fit the adsorption data. Among many adsorption isotherm models, the Fritz-Schlunder model was found to best fit the single-component adsorption data, and the Ideal Solution Adsorption Theory with Freundlich model was found to best fit the binary adsorption data. Therefore, this research used Ideal Solution Adsorption Theory with the Freundlich model and the wave propagation theory to predict the breakthrough time and compared with the experiment data. As regard to the effect of temperature, the Toth model was found to best fit the adsorption data at different temperatures.
Another purpose of this research is to separate nonvolatile organic compounds by fixed-bed adsorption. From the batch experiment test results, NaOH was found to decrease the adsorption of both phenol and PNP on the activated carbon. Therefore, NaOH was used to separate these binary nonvolatile organic compounds by fixed-bed operation and the results show such separation is possible.
|
|---|
