Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 20, Pages 9497-9502Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.07.107
Keywords
Bioregeneration; Granular activated carbon; Adsorption; Biodegradation; Chlorophenols
Funding
- Universiti Sains Malaysia under the Research University (RU) [1001/PKIMIA/814071]
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The objectives of this study are to obtain the time courses of the amount of chlorophenol adsorbed onto granular activated carbon (CAC) in the simultaneous adsorption and biodegradation processes involving 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP), respectively, and to quantify the bioregeneration efficiency of GAC loaded with 4-CP and 2,4-DCP by direct measurement of the amount of chlorophenol adsorbed onto GAC. Under abiotic and biotic conditions, the time courses of the amount of chlorophenol adsorbed onto GAC at various GAC dosages for the initial 4-CP and 2,4-DCP concentrations below and above the biomass acclimated concentrations of 300 and 150 mg/L, respectively, were determined. The results show that the highest bioregeneration efficiency was achieved provided that the initial adsorbate concentration was lower than the acclimated concentration. When the initial adsorbate concentration was higher than the acclimated concentration, the highest bioregeneration efficiency was achieved if excess adsorbent was used. (C) 2011 Elsevier Ltd. All rights reserved.
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