Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Feasibility study of heavy metal separation in fly ash using microbubbles from cavitation

미세공동기포를 이용한 비산재의 중금속 분리에 대한 타당성 연구

  • Hyeonwoo Kim (School of Mechanical Engineering, PNU) ;
  • Jinho Oh (School of Mechanical Engineering, PNU) ;
  • Hyunduk Seo (Hanwha Aerospace Co., Ltd.) ;
  • Jaehwan Eun (Zero Next Materials Co., Ltd.) ;
  • Kyung Chun Kim (School of Mechanical Engineering, Pusan National University)
  • 김현우 ;
  • 오진호 ;
  • 서현덕 ;
  • 은재환 ;
  • 김경천
  • Received : 2024.10.25
  • Accepted : 2024.11.29
  • Published : 2024.11.30
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Abstract

This study aims to confirm the feasibility of separating heavy metals and chlorine from fly ash generated in power plants and incinerators, enabling its potential reuse. A closed-loop Venturi system was used as the cavitation generator, applying the Bernoulli principle. Cavitation occurs when local pressure drops below the vapor pressure, and the energy released during the collapse of cavitation bubbles effectively detaches contaminants bound to the surface of the fly ash. Preliminary experiments visualizing cavitation in water confirmed the cavitation occurrence zone. After washing two types of fly ash, component analysis revealed a reduction in chlorine ions by 76-86.1% and lead by 89.5%. In additional experiments using a different fly ash sample, reductions in lead (80.7%), copper (99.5%), and hexavalent chromium (at least 63.6%) were observed. While there may be some errors due to measurement limitations, these results demonstrate the efficiency of this system in cleaning contaminated fly ash.

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Acknowledgement

이 논문은 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임.(No. 2020R1A5A8018822, RS-2024-00345535). 추가적인 연구비는 GS건설 사내벤처팀((주)제로넥스트머터리얼즈)으로부터 지원받음.