| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 104 === In this paper, the waste coffee grounds was first coked at different temperatures, then it was activated at different concentrations of potassium hydroxide (KOH) , and heated up to 800℃ for sintering to obtain a series of activated carbon. They were measured with relevant instruments, respectively. It was discussed that the feasibility of activated carbon was applied to remove dyeing wastewater. In addition, the interaction between the dye and the activated carbon was also studied. The results show that the higher coking temperature or the higher KOH concentration, the greater the surface area and the better the decolorization effect are. The activated carbon 7003 possesses the largest specific surface area and the best decolorization effect. Its decolorization rate is up to 98%. To compare decolorization rate in various dyes, it can be found in the order as follows: acid dyes> reactive dyes> direct dyes. When the particle size is up to 7003, it has the maximum adsorption at 3199nm. When the adsorption temperature is increased, the decolorization becomes worse. From the analysis of energy dispersive spectrometer (EDS), the activated carbon sample include S element after adsorption of dye. This result leads to form larger particle size. It is an evidence that the larger particle size is not caused by the aggregation of the activated carbon itself.
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