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Degradation of 2, 4-D acid using Mn2+ as catalyst under UV irradiation

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Wuhan University Journal of Natural Sciences

Abstract

In this paper, the oxidative degradation of 2, 4-dichlorophenoxyacetic acid (2, 4-D) using Mn2+/H2O2 reagent under UV irradiation was studied. The results show that 2, 4-D was degraded more completely in Mn2+/H2O2 solution than traditional Fenton solutions. The effects of the concentration of Mn2+, H2O2 and pH were also investigated. And under the optimal condition of \( c_{Mn^{2 + } } \) 1.48×10−4 mol/L, \( c_{H_2 O_2 } \) 8.99×10−5 mol/L and pH 3.38, the formation of ·OH was the most, both the decomposition rate of H2O2 and the degradation rate of 2, 4-D were the fastest. In addition, the photoreaction process was monitored using spin-trapping electron paramagnetic resonance (EPR), and the results indicated that the oxidative process was predominated mainly by the hydroxyl radical (·OH) gennerated in the system.

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Authors and Affiliations

  1. Alan G. MacDiarmid Research Institute of Renewable Energy, China Three Gorges University, Yichang, 443002, Hubei, China

    Yingping Huang, Xiangling Liu, Yanfen Fang & Qi Wang

  2. School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin, Ireland

    Kingtong Lau

Authors
  1. Yingping Huang
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  2. Xiangling Liu
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  3. Yanfen Fang
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  4. Qi Wang
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  5. Kingtong Lau
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Corresponding author

Correspondence to Yingping Huang.

Additional information

Foundation item: Supported by the National Basic Research Program of China (973 Program) (2008CB417206), the National Natural Science Foundation of China (20877048) and Hydrology and National Key Laboratory Open Funds of Water Resources and Hydraulic Engineering Science(2006412311)

Biography: HUANG Yingping (1964–), Professor, Ph. D., research direction: pollution ecology and water pollution control.

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Huang, Y., Liu, X., Fang, Y. et al. Degradation of 2, 4-D acid using Mn2+ as catalyst under UV irradiation. Wuhan Univ. J. Nat. Sci. 14, 262–266 (2009). https://doi.org/10.1007/s11859-009-0314-6

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  • DOI: https://doi.org/10.1007/s11859-009-0314-6

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