ABSTRACT
The Fenton reaction has been applied to the degradation of 4-chlorophenol in aqueous solutions containing various anions. The rate of the reaction was found to decrease in the following order of anions (at the same concentrations): CIO (4) ~ NO (3)- > SO(4) (2-) > CI(-)> >HPO(4) (2-) > HCO(3)(-). Degradation of the pollutant containing the above anions at concentrations typical of those found in groundwater and surface waters was affected in a similar way. The results are discussed in terms of the effects of these anions on the rates of the oxidation of ferrous anion as well as on their role in the scavenging of hydroxyl radical
Subject(s)
Chlorophenols/metabolism , Fresh Water/chemistry , Groundwater/chemistry , Anions/chemistry , Chlorophenols/chemistry , Half-Life , Time Factors , Water Pollutants, Chemical/chemistry , Water Pollutants, Chemical/metabolismABSTRACT
The effect of several sulphur compounds: sodium sulphate, sodium sulphide, ferrous sulphide,pyrite and an organosulphonic acid on the kinetics of the iron (Fe °) induced degradation of carbon tetrachloride was examined under aerobic conditions. It was observed that all of the sulphur compounds investigated significantly accelerated the reaction. The mechanisms of the processes studied as well as their possible influence on the efficiency of the iron-induced dehalogenation of pollutants, both in situ and in above-ground treatment are discussed.
