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CONTAMINANT ADSORPTION AND OXIDATION VIA FENTON REACTION
Citation:
Huling*, S G., R. G. Arnold, R. A. Sierka, P K. Jones*, AND D. Fine. CONTAMINANT ADSORPTION AND OXIDATION VIA FENTON REACTION. JOURNAL OF ENVIRONMENTAL ENGINEERING. American Society of Civil Engineers (ASCE), Reston, VA, 126(7):595-600, (2000).
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Description:
A ground water treatment process is proposed involving two cgemical processes: adsorption and oxidation. Adsorption of an organic compound onto granulated activated carbon (GAC) containing iron conveniently results in immobilizing and concentrating contaminants from the ground water onto the reactive media. Subsequently, hydrogen peroxide (H2O2) is applied which reacts with iron fixed on the GAC resulting in the formation of hydroxyl radicals whihc then oxidize sorbed contaminants. Here we present laboratory results which illustrate 2-chlorophenol (2CP) adsorption and oxidation via the H2O2 driven Fenton-mechanism. Transformation of 2CP was indicated by the formation of carboxylic acids and C1 release. 76% and 82% GAC regeneration was measured using H2O2 at 20,000 mg/L and 100,000 mg/L, respectively. The treatment efficiency was measured in 4 different GACs. The treatment efficiency increased with increased GAC Fe and 2CP concentration. The rate and extent of oxidation increased with increased [H2O2]. Lower treatment efficiency was measured at high [H2O2] (71,400 mg/L) and was attributed to increased OH scavenging by H2O2.
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