Journal
CHEMOSPHERE
Volume 75, Issue 10, Pages 1392-1400Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2009.02.049
Keywords
Quantification; Bioregeneration; Activated carbon; Activated rice husk; Phenolic compounds
Categories
Funding
- Ministry of Science, Technology and Innovation, Malaysia (MOSTI) [02-01-05-SF0069]
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The bioregeneration efficiencies of powdered activated carbon (PAC) and pyrolyzed rice husk loaded with phenol and p-nitrophenol were quantified by oxygen uptake measurements using the respirometry technique in two approaches: (i) simultaneous adsorption and biodegradation and (ii) sequential adsorption and biodegradation. It was found that the applicability of the simultaneous adsorption and biodegradation approach was constrained by the requirement of adsorption preceding biodegradation in order to determine the initial adsorbent loading accurately. The sequential adsorption and biodegradation approach provides a good estimate of the upper limit of the bioregeneration efficiency for the loaded adsorbent in the simultaneous adsorption and biodegradation processes. The results showed that the mean bioregeneration efficiencies for PAC loaded with phenol and p-nitrophenol, respectively, obtained using the two approaches were in good agreement. (C) 2009 Elsevier Ltd. All rights reserved.
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