固定床过滤中颗粒活性炭吸附的模型研究。
Model studies on granular activated carbon adsorption in fixed bed filtration.
作者信息
Jusoh A B, Noor M J M M, Plow S B
机构信息
Faculty of Science & Technology, Kolej Universiti Sains & Teknologi Malaysia, Kuala Terengganu.
出版信息
Water Sci Technol. 2002;46(9):127-35.
The removal of natural organic matter (NOM) using a continuous flow fixed bed granular activated carbon (GAC) column was studied and the results were then fitted with the Adams-Bohart, Bed-Depth-Service-Time and Clarks models. The GAC, KI-6070 and KI-8085 used in the study had external surface areas of 277 m2/g and 547 m2/g, respectively. Adsorption of NOM by the GAC was complex and involved more than one rate-limiting step. The critical bed depths for KI-6070 and KI-8085 were 0.24 m and 0.3 m, respectively. The Clark model was more effective in simulating the absorbent breakthrough process as compared to the Adams-Bohart model. The lower empty bed contact time (EBCT) i.e. 15 minutes gave a better fit to the Clark Model as compared to EBCT of 20 and 30 minutes.
研究了使用连续流固定床颗粒活性炭（GAC）柱去除天然有机物（NOM）的情况，然后将结果与亚当斯-博哈特模型、床层深度-服务时间模型和克拉克模型进行拟合。研究中使用的GAC、KI-6070和KI-8085的外表面积分别为277平方米/克和547平方米/克。GAC对NOM的吸附过程复杂，涉及多个限速步骤。KI-6070和KI-8085的临界床层深度分别为0.24米和0.3米。与亚当斯-博哈特模型相比，克拉克模型在模拟吸附剂穿透过程方面更有效。与20分钟和30分钟的空床接触时间（EBCT）相比，较低的空床接触时间即15分钟对克拉克模型的拟合效果更好。
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