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

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

Research output: Contribution to journalArticle

17 Scopus citations

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.

Original languageEnglish
Pages (from-to)1660-1669
Number of pages10
JournalJournal of Zhejiang University: Science A
Volume10
Issue number11
DOIs
StatePublished - 1 Dec 2009

Keywords

  • Hydrogen peroxide assisted ultraviolet (UV/H O) process
  • Hydroxyl radical
  • Microcystin-LR (MC-LR)
  • Photochemical degradation
  • Reaction kinetics

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