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PAHs로 오염된 침전물의 초음파 처리시 입자크기가 미치는 영향

The Effect of Different Particle Size from PAHs Contaminated Sediment by Ultrasonic Irradiation

  • 나승민 ;
  • 김지형 (고려대학교 건축사회환경공학과) ;
  • 최명찬 (고려대학교 건축사회환경공학과) ;
  • 안윤경 (한국기초가학지원연구원, 서울센터 분석연구부) ;
  • Na, Seung-Min (Department of Civil and Environmental and Geodetic Science, Ohio State University) ;
  • Khim, Jee-Hyeong (Department of Civil Environmental and Architecture, Korea University) ;
  • Cui, Ming-Can (Department of Civil Environmental and Architecture, Korea University) ;
  • Ahn, Yun-Gyong (Korea Basic Science Institute) ;
  • Weavers, Linda K. (Department of Civil and Environmental and Geodetic Science, Ohio State University)
  • 투고 : 2010.02.04
  • 심사 : 2010.03.23
  • 발행 : 2010.03.31

초록

Sediments of Little Scioto (LS) River in Ohio was contaminated by poor disposal of creosote from Baker Wood Creosoting Facility. Among the primary compounds of creosote, Polycyclic Aromatic Hydrocarbons (PAHs) are the most common ingredient PAHs are known for toxic, carcinogenic and mutagenic compounds. There are many difficulties to remove the PAHs in nature environment because their characteristics are having a less water-solubility, volatile and low mobility properties as increasing the molecular weight. The generation of hydroxyl radicals (${\cdot}OH$) and hydrogen peroxide ($H_2O_2$) forms as well as high temperature (5000 K) and pressure (1000 atm) by a physico-chemical effects of ultrasound during a cavitation collapse can promote the degradation and desorption of PAHs in sediment And it can also produces shock wave and microjets which are able to change the size and surface of particle in solid-liquid system as one of physical effects. Therefore, we explored to understand the role of particle size, the effect of elimination for PAHs concentration by ultrasound and optimize the conditions for ultrasonic treatment. The condition of various size of particles (> $150{\mu}m$, < $150{\mu}m$) and solid-liquid ratio (12.5g/L, 25g/L) for the treatment was considered and ultrasonic power (430 W/L) with liquid - hexane extraction and microwave extraction method were applied after ultrasound treatment.

키워드

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