Model studies on granular activated carbon adsorption in fixed bed filtration.
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.
Jusoh
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AB
Faculty of Science & Technology, Kolej Universiti Sains & Teknologi Malaysia, Kuala Terengganu.
Noor
M J M M
MJ
Plow
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SB
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D005374:Filtration; D008962:Models, Theoretical; D009930:Organic Chemicals / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
D009930:Organic Chemicals; D002244:Carbon