Practical applications of the fenton reaction to the removal of chlorinated aromatic pollutants

Abstract

In applying practical Fenton-type degradation systems to heavily polluted wastes, either for the pre-treatment of waters with a high COD value prior to biodegradation or for complete mineralization of pollutants, the set up of appropriate reaction conditions appears to be a key factor. Also, it is desirable to keep the concentration of iron salts within the lower limits in order to minimize the production and disposal of iron oxide sludges.

Mechanism of the anodic oxidation of 4-chloro-3-methyl phenol in aqueous solution using Ti/SnO2–Sb/PbO2 electrodes

“…In this way, in the anodic oxidation of CMP, the first step was the release of the chloride ion from the aromatic ring to form phenolics or quinones. As for the dechlorination mechanism, in previous studies dealing with other chloro-phenolics, it was usually suggested that the predominant chlorine removal mechanism was the hydroxyl substitution on the phenolic ring structure (ipsosubstitution) [30,48]. Our results were in accordance with this fact, as discussed above.…”

Role of hydrogen peroxide and hydroxyl radical in pyrite oxidation by molecular oxygen

“…By promoting the formation of OH radicals, either in the subsurface or in pump-and-treat remediation systems, it is possible to convert non-biodegradable xenobiotic compounds into biodegradable compounds (Watts et al, 1999;Teel et al, 2001;Detomaso et al, 2003;Kavitha and Palanivelu, 2004).…”

Assessment of the generation of chlorinated byproducts upon Fenton-like oxidation of chlorophenols at different conditions

“…Advanced oxidation processes (AOPs) can be regarded as a potential solution [5,6]. Specifically, Fenton and Fenton-like oxidation are being increasingly used for the abatement of water pollutants [7][8][9][10][11].…”