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|標題: ||Degradations of acetaminophen via a K2S2O8-doped TiO2 photocatalyst under visible light irradiation|
|作者: ||Lin, Justin Chun-Te|
de Luna, Mark Daniel G.
Aranzamendez, Graziel L.
|貢獻者: ||Feng Chia Univ, Dept Environm Engn & Sci|
Univ Philippines Diliman, Dept Chem Engn
Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
|關鍵字: ||Potassium persulfate|
Visible light active catalyst
Photocatalytic degradation parameters
|上傳時間: ||2018-01-18 11:38:00 (UTC+8)|
|出版者: ||Pergamon-Elsevier Science Ltd|
|摘要: ||Acetaminophen (ACT) is a mild analgesic commonly used for relief of fever, headache and some minor pains. It had been detected in both fixed factory-discharged wastewaters, and diverse sources, e.g. surface waters during festival events. Degradation of such trace emergent pollutants by titanium dioxide (TiO2) photocatalysts is a common approach; however, the band gap that can be utilized in the UV range is limited. In order to extend downward the energy required to excite the photocatalytic material, doping with potassium peroxodisulfate (K2S2O8) by a sol-gel method was done in this work. The visible-light active photocatalyst was tested on the degradation of ACT under four parameters including: initial ACT concentration, catalyst dose, initial pH, and system temperature. Optimal conditions, which achieved 100% ACT degradation, were obtained by using 0.1 mM ACT initial concentration, catalyst dose of 1 g L-1, initial pH of 9.0 and system temperature of 22 degrees C at the end of 9-h irradiation. Meanwhile, three types of degradation kinetic models (i.e. zero, pseudo first and second order) were tested. The feasible model followed a pseudo-first order model with the computed constant (k(app)) of 7.29 x 10(-3) min(-1). The present study provides a better photocatalytic degradation route by K2S2O8-modified TiO2 in comparison with pristine TiO2, in wastewater treatment dealing with ACT and other persistent organic pollutants. (C) 2016 Elsevier Ltd. All rights reserved.|
|關聯: ||Chemosphere, v.155, pp.388-394|
|Appears in Collections:||[環境資源管理系(所)] 期刊論文|
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