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http://dx.doi.org/10.7857/JSGE.2013.18.4.050

Oxidative Degradation of Phenol Using Zero-Valent Iron-Based Fenton-Like Systems  

Kim, Hak-Hyeon (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST))
Lee, Hye-Jin (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST))
Kim, Hyung-Eun (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST))
Lee, Hongshin (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST))
Lee, Byeong-Dae (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Lee, Changha (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST))
Publication Information
Journal of Soil and Groundwater Environment / v.18, no.4, 2013 , pp. 50-57 More about this Journal
Abstract
For the last couple of decades, the Fenton (-like) systems have been extensively studied for oxidation of organic contaminants in water. Recently, zero-valent iron (ZVI) has received attention as a Fenton catalyst as well as a reducing agent capable of producing reactive oxidants from oxygen. In this study, the ZVI-based Fenton reaction was assessed for the oxidative degradation of phenol using $ZVI/O_2$, $ZVI/H_2O_2$, ZVI/Oxalate/$O_2$ and hv/ZVI/Oxalate/$O_2$ systems. Reaction parameters such as pH and reagent dose (e.g., ZVI, $H_2O_2$, and oxalate) were examined. In the presence of oxalate (ZVI/Oxalate/$O_2$ and hv/ZVI/Oxalate/$O_2$ systems), the degradation of phenol was greatly enhanced at neutral pH values. It was found that ZVI accelerates the Fenton reaction by reducing Fe(III) into Fe(II). The conversion of Fe(III) into Fe(II) by ZVI was more stimulated at acidic pH than at near-neutral pH values.
Keywords
Advanced oxidation process; Fenton reaction; Zero-valent iron; Hydroxyl radical; Phenol oxidation;
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