Oxidation of Chlorophenols by MnO2 Supported on Kaolinite
International Journal of Environmental Protection and Policy
Volume 5, Issue 3, May 2017, Pages: 32-37
Received: May 4, 2017; Published: May 5, 2017
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Authors
Xiong Yang, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
Shao Xiaoling, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
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Abstract
Chlorophenols (CPs) are of significant concern because of their wide use, toxicity and persistence in environments. In the present study, -MnO2 supported on kaolinite was used as an oxidant to oxidize three kinds of CPs, 4-chlorophenol (CP), 2, 4-dichlorophenol(DCP) and 2, 4, 6-trichlorophenol(TCP). XRD pattern showed that the synthetic MnO2 has a poor crystallinity, and SEM results revealed that MnO2 was evenly coated on kaolinite with a loading amount of 8.64mg/g. All three CPs were efficiently degraded by supported MnO2 with a removal order of 2, 4, 6-TCP>2, 4-DCP>4-CP. The degradation of CPs obviously accompanied with the release of Mn2+. Results also showed the increased oxidant’s dosage promotes the removal of CPs. The reaction of CPs with MnO2 is strictly pH-dependent, the removal of CPs decreased with pH increasing.
Keywords
Supported MnO2, CPs, Removal, Reaction
To cite this article
Xiong Yang, Shao Xiaoling, Oxidation of Chlorophenols by MnO2 Supported on Kaolinite, International Journal of Environmental Protection and Policy. Vol. 5, No. 3, 2017, pp. 32-37. doi: 10.11648/j.ijepp.20170503.11
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