Journal
WASTE MANAGEMENT
Volume 21, Issue 8, Pages 695-702Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0956-053X(01)00006-X
Keywords
o-chlorophenol; p-chlorophenol; adsorption/biosorption; dried activated sludge; fly ash; granular activated carbon
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The potential use of dried activated sludge and fly ash as a substitute for granular activated carbon for removing mono-chlorinated phenols (o-chlorophenol and p-chlorophenol) was examined. The pollutant binding capacity of the adsorbent/biosorbent was shown to be a function of substituted group, initial pH and initial mono-chlorinated phenol concentration. The working sorption pH value was determined as 1.0 and the equilibrium uptake increased with increasing initial mono-chlorinated phenol concentration up to 500 mg dm(-3) for all the mono-chlorinated phenol-sorbent systems. The suitability of the Freundlich, Langmuir and Redlich-Peterson adsorption models to the equilibrium data were investigated for each mono-chlorinated phenol-sorbent system. The results showed that the equilibrium data for all the mono-chlorinated phenol-sorbent systems fitted the Redlich-Peterson model best within the concentration range studied. (C) 2001 Elsevier Science Ltd. All rights reserved.
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