INVESTIGATION OF THE BIOSORPTION OF PHENOL AND MONOCHLORINATED PHENOLS ON THE DRIED ACTIVATED-SLUDGE

The biosorption of phenol, o-chlorophenol and p-chlorophenol from aque ous solutions on dried activated sludge has been investigated. The pol lutant binding capacity of the biosorbent was shown as a function of i nitial pH, initial pollutant concentration and substituted group. The maximum loading capacity of biosorbent was found to be 86.1 mg g(-1) f or phenol, 102.4 mg g(-1) for o-chlorophenol and 116.3 mg g(-1) for p- chlorophenol at 100 mg litre(-1) initial pollutant concentration. The Freundlich and Langmuir adsorption isotherms were used for the mathema tical description of the biosorption and the isotherm constants were e valuated for each pollutant. (C) 1998 Elsevier Science Ltd. All rights reserved.