Utilization of the Bottom Ash from Municipal-Solid-Waste Incinerator (MSWI) as Adsorbent for Removal of Methylene Blue

• Main Authors: Liu Shih-Yun, 劉詩云
• Other Authors: 廖文彬
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/01617070105739674914

碩士 === 國立中興大學 === 環境工程學系所 === 97 === In this work, MSWI bottom ash (BA) was evaluated for its ability to removal of Methylene Blue (MB) . The H-BA, N-BA and W-BA were made by treating BA with 0.5 M HNO3 , 0.5 M NaOH and pure water, respectively. Sorption isotherm of MB onto the H-BA, N-BA, W-BA and BA was determined at different temperature(15℃, 25℃ and 35℃) with the initial concentrations of MB in the range of 0-20 mg/L. The equilibrium data were analyzed using the Freundlich, Langmuir, Temkin, B.E.T., Dubinin-Radushkevich (D-R), Halsey and Harkin–Jura isotherm models. The removal rates of MB are 100％ and 97％ by H-BA, when the initial concentrations of MB are 5.5 and 20 mg/L, respectively. The equilibrium data can be described well by the Langmuir isotherm models. Sorption kinetic of MB onto the H-BA, N-BA, W-BA and BA was investigated under time period of 1620 mins. The H-BA has a faster removal rate than other BA.The kinetic data were analyzed in terms of the Webber’s intraparticle diffusion, Lagergeren, Ho and McKay, Elovich , zero-order, 1-order and 2-order kinetic models. The Ho and McKay kinetic model best describs the sorption process for H-BA. Keywords: MSWI bottom ash, Acid, Methylene Blue (MB), Dye removal, Kinetic process, Adsorption isotherm