119th General Meeting of the KCS

Type Poster Presentation
Area 환경에너지
Room No. 포스터발표장
Time 4월 20일 (목요일) 11:00~12:30
Code ENVR.P-514
Subject Catalytic removal of p-nitrophenol by water treated coal fly ash
Authors 박재형, 배성준*
건국대학교 환경공학과, Korea
Abstract A huge amount of fly ash (FA, around 9 million tons per year) has been produced from coal-fired thermal power plants in Korea. To recycle the FA and apply to environmental remediation technologies, we investigated the feasibility of FA as an use of environmental catalysts in this study. A significant reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP) was observed by ultra-pure Water treated FA (WFA) in the presence of NaBH4, while raw fly ash (RFA) showed a relatively low catalytic activity. We also observed totally different behaviors between FA and WFA, resulting in inhibition effect on the p-NP reduction by increase of FA contents as compared to that of WFA (enhancement effect). To elucidate the reaction mechanism, we synthesized artificial FAs by mixing major components of FA and performed the p-NP reduction, showing that Al2O3, SiO2, CaO and MgO revealed no significant catalytic activity, but Fe2O3 did. In addition, a various parametric tests has been performed to investigate the effect of environmental factors on the catalytic reduction of p-NP in the presence of NaBH4, Finally, five times recycling test showed a good reusability of WFA, indicating the potential use of WFA for the treatment of wastewater containing reductively degradable pollutants.
E-mail bsj1003@konkuk.ac.kr