Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34123
Title: The influence of pH on the degradation of phenol and chlorophenols by potassium ferrate
Authors: Graham, N
Jiang, CC
Li, XZ
Jiang, JQ
Ma, J
Keywords: Chlorophenols
Oxidation
Phenols
Potassium ferrate
Trichloroethylene
Issue Date: 2004
Publisher: Pergamon Press
Source: Chemosphere, 2004, v. 56, no. 10, p. 949-956 How to cite?
Journal: Chemosphere 
Abstract: This paper presents information concerning the influence of solution pH on the aqueous reaction between potassium ferrate and phenol and three chlorinated phenols: 4-chlorophenol (CP), 2,4-dichlorophenol (DCP), 2,4,6-trichlorophenol (TCP). The redox potential and aqueous stability of the ferrate ion, and the reactivity of dissociating compounds, are known to be pH dependent. Laboratory tests have been undertaken over a wide range of pH (5.8-11) and reactant concentrations (ferrate:compound molar ratios of 1:1 to 8:1). The reactivity of trichloroethylene was also investigated as a reference compound owing to its non-dissociating nature. The extent of compound degradation by ferrate was found to be highly pH dependent, and the optimal pH (maximum degradation) decreased in the order: phenol/CP, DCP, TCP; at the optimal pH the degree of degradation of these compounds was similar. The results indicate that for the group of phenol and chlorophenols studied, the presence of an increasing number of chlorine substituent atoms corresponds to an increasing reactivity of the undissociated compound, and a decreasing reactivity of the dissociated compound.
URI: http://hdl.handle.net/10397/34123
ISSN: 0045-6535
EISSN: 1879-1298
DOI: 10.1016/j.chemosphere.2004.04.060
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