Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/27914
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    標題: Removal of monoethanolamine and phosphate from thin-film transistor liquid crystal display (TFT-LCD) wastewater by the fluidized-bed Fenton process
    作者: Su, Chia-Chi
    Chen, Chia-Min
    Anotai, Jin
    Lu, Ming-Chun
    貢獻者: 環境資源管理系
    關鍵字: Fluidized-Bed Reactor
    Fenton Process
    日期: 2013-04
    上傳時間: 2014-05-26 10:48:49 (UTC+8)
    出版者: Elsevier Science Sa
    摘要: Synthetic wastewater containing monoethanolamine (MEA) and phosphate, which was generated during the cleaning and etching processes for thin-film transistor liquid crystal displays (TFT-LCDs) was treated using a novel process. Degradation of MEA was studied and compared using the Fenton and fluidized-bed Fenton processes. Comparison results show that the Fe2+ concentration was an important factor for MEA and chemical oxygen demand (COD) removal in the fluidized-bed Fenton process. The degradation of MEA followed pseudo-first-order reaction kinetics. The MEA, COD and total organic carbon (TOC) removal efficiencies by the fluidized-bed Fenton process after 60 min were 15-26% higher than those by the Fenton process. The phosphate removal rate followed a first-order reaction. Phosphate removal was optimized by selecting sand grains sized (0.24-0.5 mm) and a molar ratio of Fe2+/P of 1.3 at pH 7. In the two stages, optimized conditions were Fe2+/P = 1.3 at pH 7 using 100 g SiO2 for phosphate removal, and 3 mM Fe2+ and 50 mM H2O2 at pH 3 for MEA removal; phosphate removal efficiency was 45% and MEA removal efficiency was 76%. (C) 2012 Published by Elsevier B.V.
    關聯: Chemical Engineering Journal, v.222, pp.128-135
    显示于类别:[環境資源管理系(所)] 期刊論文


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