| Summary: | 碩士 === 中原大學 === 環境工程學系 === 105 === Traditional activated carbon consists predominantly of micropores. This property inhibits the removal of macromolecular contaminants. Therefore, to facilitate the removal of these contaminants, we prepared activated carbon with relatively larger pores using a new approach comprising three steps.
The adsorption test results indicated that the activated carbon prepared using three steps (K2CO3 to carbon ratio = 3:1) most effectively removed MG5 and AR1. At 10, 30, and 50 C, the respective adsorption capacity for MG5 was 755.74, 760.34, and 1334.23 mg/g; that for AR1 was 340.17, 476.49, and 552.8 mg/g. However, the traditional activated carbon (i.e., prepared using two steps) (K2CO3 to carbon ratio = 3:1) most effectively removed phenol; the adsorption capacity was 506.48, 466.18, 391.1 mg/g at 10, 30, and 50 C, respectively. From kinetics analysis, the adsorption rate of phenol was faster than that of either MG5 or AR1. According to thermodynamics, the adsorption of MG5 or AR1 was endothermic, and that of phenol was exothermic. The results of SEM and FTIR illustrated that the spherical shape of the activated carbon prepared using three steps was not affected by the high temperature during the preparation process, and its surface contained more functional groups. The BET analysis showed that the activated carbon prepared using three steps exhibited larger pores, but its specific surface area was maintained at more than 1000 m2/g.
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