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자료유형
학술대회자료
저자정보
저널정보
한국지반환경공학회 한국지반환경공학회 학술발표회논문집 한국지반환경공학회 2005년도 학술발표회논문집
발행연도
2005.9
수록면
133 - 138 (6page)

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Laboratory batch experiments were conducted to evaluate the degradation rates of polycyclic aromatic hydrocarbons (PAHs). Fenton’s reactions for the degradation of phenanthrene were carried out with aqueous and slurry phase, to investigate the effects of sorption of PAH onto solid phase. Various types of surfactants and electrolyte solutions were also used to evaluate the effects on the PAH removal rates by Fenton’s reaction. In aqueous phase reaction, inhibitory effects of synthetic surfactants in the removal of phenanthrene were observed, implying that surfactant molecules also acted as strong scavenger of hydroxyl radicals. However, use of carboxymethyl-β-cyclodextrin (CMCD), natural surfactant, showed a slight enhancement in the degradation of phenanthrene. It was also shown that Fenton degradation of phenanthrene were greatly enhanced by addition of NaCl, indicating that potent radical ion (OCl-) played an important role in the phenanthrene degradation, although chloride ion might be acted as scavenger of radicals at low concentrations. Phenanthrene in slurry phase was resistant to Fenton degradation. It might be due to the fact that free radicals were mostly reacting with dissolved species much faster than with sorbed PAH. Even though synthetic surfactants were added to increase the phenanthrene concentration in dissolved phase, low degradation efficiency was obtained because of the scavenging of radicals by surfactants molecules. As an alternative, use of Fenton reaction with CMCD could be considered to increase degradation rates of phenanthrene desorbed from solid phase.

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SYNOPSIS

1. INTRODUCTION

2. MATERIALS AND METHODS

3. RESULTS AND DISCUSSION

4. CONCLUSIONS

References

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