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Experimental and model comparisons of H2O2 assisted UV photodegradation of Microcystin-LR in simulated drinking water |
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| Authors: | Lei Li Nai-yun Gao Yang Deng Juan-juan Yao Ke-jia Zhang Hai-jun Li Di-di Yin Hua-se Ou Jian-wei Guo |
| Affiliation: | 1. State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China 2. Department of Civil Engineering and Surveying, University of Puerto Rico, Mayaguez, 00681, USA 3. Faculty of Material Science and Chemistry Engineering, China University of Geosciences, Wuhan, 430074, China |
| Abstract: | The degradation of Microcystin-LR (MC-LR) in water by hydrogen peroxide assisted ultraviolet (UV/H_2O_2) process was investigated in this paper. The UV/H_2O_2 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 H_2O_2, 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. |
| Keywords: | Microcystin-LR (MC-LR) Hydrogen peroxide assisted ultraviolet (UV/H_2O_2) process Hydroxyl radical Reaction kinetics Photochemical degradation |
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