Degradation and formation of wood odorant β-cyclocitral during permanganate oxidation

Ke Jia Zhang, Nai Yun Gao, Hung Kai Yen, Yi Ting Chiu, Tsair Fuh Lin

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

The effect of permanganate oxidation on the formation and degradation of wood odorant β-cyclocitral in water was investigated. Oxidation experiments were conducted for β-cyclocitral prepared from pure chemicals and extracted from Microcystis aeruginosa. The data were simulated with appropriate kinetic rate models. The formation and degradation of β-cyclocitral during the oxidation of β-carotene were also monitored and modeled. The degradation of β-cyclocitral prepared from pure chemicals followed second-order kinetics with a rate constant of 91.7±2.4M-1s-1, and that of the β-cyclocitral precursor, β-carotene, followed first-order kinetics with a rate constant of 0.0054±0.0004min-1. During the oxidation of β-carotene, β-cyclocitral was produced. The formation and degradation can both be simulated by first-order kinetics with respect to β-carotene and β-cyclocitral concentrations, respectively. The degradation rate of β-cyclocitral produced from β-carotene was found to be much slower than that for β-cyclocitral obtained from pure chemicals, very likely due to a mass transfer limitation. The kinetic models were further employed to simulate the oxidation of β-cyclocitral in the presence of β-carotene and for β-cyclocitral extracted from M. aeruginosa, respectively. The models well predict/fit the experimental data, with rate constants similar to other experiments, indicating that the models may be used for simulating the formation and degradation of β-cyclocitral in water treatment systems.

原文English
頁(從 - 到)362-368
頁數7
期刊Journal of Hazardous Materials
194
DOIs
出版狀態Published - 2011 十月 30

All Science Journal Classification (ASJC) codes

  • 環境工程
  • 環境化學
  • 廢物管理和處置
  • 污染
  • 健康、毒理學和誘變

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