本文利用廢棄咖啡渣在不同溫度下先進行焦化，然後使用不同濃度之氫氧化鉀(KOH)使其活化，再以800oC燒結，製得一系列活性碳。分別經由相關儀器檢測，一方面探討活性碳應用於染料廢水脫色處理之可行性；另方面檢測活性碳分別與染料之間相互作用。由檢測結果可發現活性碳焦化溫度越高及活化時KOH濃度越高，比表面積越大，染料脫色效果越佳，其中以活性碳7003之比表面積為最大且脫色效果為最佳，最高脫色率可達到98%。對於不同染料脫色率之比較，可以發現其脫色效果之順序為酸性染料>反應染料>直接染料。其次活性碳與染料相互作用後，其粒徑以7003吸附時為最大值可達3199nm，而提升吸附溫度對其脫色效果反而越差。透過能量分散式光譜儀(EDS)可以得知，吸附染液後之活性碳具有染料的S元素，造成粒徑變大，而非活性碳自身發生反應而產生團聚造成變大。

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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