Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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A Study on Generative Characteristics of Radicals in Aqueous Solutions of Humic Acids using Electron Spin Resonance

전자기공명기법을 이용한 Humic Acid 용액에서의 라디칼 발생 특성에 관한 연구

  • Han, Sang-Kuk (Department of Marine Environmental Engineering, Faculty of Ocean System Engineering, Mokpo National University)
  • 한상국 (목포해양대학교 해양시스템공학부 해양환경공학)
  • Published : 2008.06.30
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Abstract

We studied to determine quantitatively the radical species generated from humic acid (HA) solutions by irradiation(>400 mn). The formation of radical species from HA solutions was investigated with ESR spectroscopy. We gave ESR spectrum with g-value 2.0048 and line width 0.559mT, coincided with those of the semiquinone radical. 0.1 mg/L HA solution generated the radicals of $1.2{\times}10^{-6}M$, increased with increasing HA concentration. Also, pH and ionic strength effect of the amount of the semiquinone radical generate from HA solution. In this study, we have found that the singlet oxygen affects the semiquinone radicals generation in HA solution.

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References

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