50%TiO2/6%WO3 졸 용액에서의 톨루엔 처리에 대한 아세톤의 광활성 증가효과

• 영문명: Photolysis Improvement of Toluene in 50%TiO2/6%WO3 Sol Solutions Sensitized by Acetone
• 발행기관: 한국환경보건학회
• 저자명: 신혜승(Hye Seung Shin) 김재현(Jae Hyoun Kim)
• 간행물 정보: 『1. 한국환경보건학회지』제38권 제3호, 261~268쪽, 전체 8쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2012.06.30

영문 초록

Objectives: The photocatalytic degradation of toluene in a batch mode photoreactor for the purpose of the hazardous waste treatment was investigated. Methods: Kinetic experiments using a low pressure mercury lamp (Lambda Scientific Pty Ltd, 50 Watt) emitting both UV and visible light were performed at 31oC over toluene concentrations ranging from 10 to 50 mg/l in water with 50%TiO2/6%WO3 (TW) concentration of 1 g/l at a pH of 6. Results: Kinetic studies showed that 50%TiO2/6%WO3 (TW) photocatalyst was highly active in toluene degradation; we observed that 99% of the pollutant was degraded after six hours under visible irradiation; furthermore, we observed that adsorption onto TW catalyst was responsible for the decrease of toluene with pseudo-first order kinetics. It was also found that oxygen as a radical source in the sol medium played a significant role in affecting the photodegradation of toluene, especially with a two-fold elevation. This increase was achieved by a more than four-fold elevation of the photodegradation of toluene in the presence of acetone than without, presumably via an energy transfer mechanism. Conclusions: We concluded that photodegradation in acetone and oxygen molecules along with TW was an effective method for the removal of toluene from wastewater.

키워드

photodegradation 50%TiO2/6%WO3 acetone toluene pseudo-first order kinetic