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• 영문명: Defluoridation of Wastewater by Adsorption on Bituminous Coal Fly Ash
• 발행기관: 한국환경보건학회
• 저자명: 이성대 박석환 정문식
• 간행물 정보: 『1. 한국환경보건학회지』제19권 제1호, 51~56쪽, 전체 6쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 1993.03.30

영문 초록

This study was performed to find the ability of bituminous coal fly ash to remove fluoride from water and wastewater at different fluoride concentration, reaction temperature, reaction time and pH. The removal of fluoride is favorable at low concentration, high temperature and acidic pH. With the increase in the initial fluoride concentration, the amount adsorbed increased. Adsorption process was exothermic at pH 2.0. Physisorption process was predominant over pH 2.3, while Chemisorption was under pH 2.3. Fluoride uptake by fly ash was conducted the adherence of fluoride on the active surface sites of adsorbent and its intraparticle diffusion within adsorbent. The values of rate constants of adsorption were 3.028X 10$^{-3}$, 4.715X 10$^{-3}$, 2.88X 10$^{-3}$ (min) and intraparticle diffusion were 1.434X10$^{-3}$, 3.012X10$^{-3}$, 5.635X10$^{-3}$ at each temperatures.