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Experimental and model comparisons of H2O2 assisted UV photodegradation of Microcystin-LR in simulated drinking water

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Abstract

The degradation of Microcystin-LR (MC-LR) in water by hydrogen peroxide assisted ultraviolet (UV/H2O2) process was investigated in this paper. The UV/H2O2 process appeared to be effective in removal of the MC-LR. MC-LR decomposition was primarily ascribed to production of strong and nonselective oxidant-hydroxyl radicals within the system. The intensity of UV radiation, initial concentration of MC-LR, MC-LR purity, dosages of H2O2, the initial solution pH, and anions present in water, to some extent, influenced the degradation rate of MC-LR. A modified pseudo-first-order kinetic model was developed to predict the removal efficiency under different experimental conditions.

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Authors and Affiliations

  1. State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China

    Lei Li, Nai-yun Gao, Juan-juan Yao, Ke-jia Zhang, Di-di Yin, Hua-se Ou & Jian-wei Guo

  2. Department of Civil Engineering and Surveying, University of Puerto Rico, Mayaguez, 00681, USA

    Yang Deng

  3. Faculty of Material Science and Chemistry Engineering, China University of Geosciences, Wuhan, 430074, China

    Hai-jun Li

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  1. Lei Li
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  2. Nai-yun Gao
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  3. Yang Deng
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  4. Juan-juan Yao
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  5. Ke-jia Zhang
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  6. Hai-jun Li
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  7. Di-di Yin
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  8. Hua-se Ou
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  9. Jian-wei Guo
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Correspondence to Nai-yun Gao.

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Project supported by the National Key Technologies Supporting Program of China during the 11th Five-Year Plan Period (No. 2006BAJ08B06), the National Major Project of Science & Technology Ministry of China (No. 2008ZX07421-002), and the Shanghai Science & Technology Commission Key Scientific & Technological Project (No. 072312001), China

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Li, L., Gao, Ny., Deng, Y. et al. Experimental and model comparisons of H2O2 assisted UV photodegradation of Microcystin-LR in simulated drinking water. J. Zhejiang Univ. Sci. A 10, 1660–1669 (2009). https://doi.org/10.1631/jzus.A0820642

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  • DOI: https://doi.org/10.1631/jzus.A0820642

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